High Temperature Thermoplastics

When we talk about polymers, the most common distinctions we come across are Thermosets and Thermoplastics. Thermosets have the property of being able to be shaped only once while thermoplastics can be reheated and remolded to several attempts. Thermoplastics further can be divided into commodity thermoplastics, engineering thermoplastics (ETP) and high-performance thermoplastics (HPTP). High-performance thermoplastics, also known as high-temperature thermoplastics, have melting points between 6500 and 7250 F which is up to 100% more than standard engineering thermoplastics. High-temperature thermoplastics are known to retain their physical properties at higher temperatures and exhibit thermal stability even in the longer run. These thermoplastics, therefore, have higher heat deflection temperatures, glass transition temperatures, and continuous use temperature. Because of its extraordinary properties, high-temperature thermoplastics can be used for a diverse set of industries such as electrical, medical devices, automotive, aerospace, telecommunications, environmental monitoring, and many other specialized applications. Advantages of High-Temperature Thermoplastics Enhanced Mechanical PropertiesHigh-temperature thermoplastics show a high level of toughness, strength, stiffness, resistance to fatigue and ductility. Resistance to DamagesHT thermoplastics show increased resistance to chemicals, solvents, radiation and heat, and do not disintegrate or lose its form upon exposure. RecyclableSince high-temperature thermoplastics have the ability to be remolded several times, they can be easily recycled and still display the same dimensional integrity and strength as before. Types of High-Performance Thermoplastics Polyamideimides (PAIs)High-performance polyamides (HPPAs)Polyimides (PIs)PolyketonesPolysulfone derivatives-aPolycyclohexane dimethyl-terephthalates (PCTs)FluoropolymersPolyetherimides (PEIs)Polybenzimidazoles (PBIs)Polybutylene terephthalates (PBTs)Polyphenylene sulfidesSyndiotactic polystyrene Noteworthy High-Temperature Thermoplastics Polyetheretherketone (PEEK)PEEK is a crystalline polymer that has good thermal stability because of its high melting point (300 C). It is inert to common organic and inorganic liquids and thus has high chemical resistance. In order to enhance mechanical and thermal properties, PEEK is created with fiberglass or carbon reinforcements. It has high strength and good fiber adhesion, so does not wear and tear easily. PEEK also enjoys the advantage of being non-flammable, good dielectric properties, and exceptionally resistant to gamma radiation but at a higher cost. Polyphenylene Sulfide (PPS)PPS is a crystalline material that is known for its striking physical properties. Apart from being highly temperature resistant, PPS is resistant to chemicals such as organic solvents and inorganic salts and can be used as a corrosion resistant coating. The brittleness of PPS can be overcome by adding fillers and reinforcements which also have a positive impact on PPS’s strength, dimensional stability, and electrical properties. Polyether Imide (PEI)PEI is an amorphous polymer that exhibits high-temperature resistance, creep resistance, impacts strength and rigidity. PEI is extensively used in the medical and electrical industries because of its nonflammability, radiation resistance, hydrolytic stability and ease of processing. Polyetherimide (PEI) is an ideal material for a variety of medical and food contact applications and is even approved by the FDA for food contact. KaptonKapton is a polyimide polymer that is able to withstand a wide range of temperatures. It is known for its exceptional electrical, thermal, chemical and mechanical properties, making it applicable for use in a variety of industries such as automotive, consumer electronics, solar photovoltaic, wind energy and aerospace. Because of its high durability, it can withstand demanding environments. Future of High Temp Thermoplastics There have been advancements with regards to high-performance polymers previously and it would continue to be so because of the range of applications that can be carried out. Since these thermoplastics have high glass transition temperatures, good adhesion, oxidative and thermal stability along with toughness, their use is expected to increase by many industries. Additionally, as these high-performance thermoplastics are more commonly manufactured with continuous fiber reinforcement, their use and  acceptance  will continue.

Comparison between The Iliad and The Women of Troy Essay

The Iliad by Homer and the Women of Troy by Euripides are both Greek works of literature that look at the Trojan War from different perspectives. Book 6 of the Iliad illustrates that the ultimate glory is to fight for the city with no regard to the impact on the family. The Women of Troy focuses on the negatives that war causes, especially towards the soldier’s wives and children. Whereas the Iliad focuses on the battle itself and centers on the warriors, the Women of Troy focuses on the wrath the war brings upon the families left behind. The central theme in both the works is the Trojan War and they both offer perspectives of the duty of a person, the role of predetermined fate, and the role of women. Homer’s Iliad focuses†¦show more content†¦In contrast, the Women of Troy focuses mainly on the negatives of war especially as they affect the dependents of the soldiers. The emphasis is on the wrath the war brings on the dependents of the defeated army. The focus of the Women of Troy is the suffering of these helpless human beings who are enslaved, raped or assigned to be concubines. The Women of Troy illustrates how the women are treated just like objects once their city fell and their army lost. The women are â€Å"assigned by lottery as slaves to various Greeks –Arcadians, Thessalians, or Athenians† Even the priestess Cassandra who had taken an oath of life long virginity is forced to be King Agamemnon’s concubine. Another prominent woman, princess Polyxena is beheaded and the queen Hecabe is assigned to be a slave of Odysseus. The subjects of the Women of Troy are not the war heroes but their helpless wives; the primary focus is no t on the celebration of the glorious fight of individual soldiers but on the utter desperation of their wives and children. Hecabe’s words in the Women of Troy captures this helplessness when she says, â€Å"My virgin daughters †¦ Given to our enemies† as well as â€Å"In my old age shall go to Hellas as a slave†. The role of women in society is another area in which these two Greek works offer different perspectives. In theShow MoreRelatedThe Role Of Women And Their Influence On The War1446 Words   |  6 Pagesanother vital component in The Iliad is the role of women and their influence on the war and their association with different characters. Scholar Mary R. Lefkowitz, disputes that ladies had some freedom and were under the supervisions of man. The scholar inscribes: In the Homeric epics, women seem to have little independence; they were always under the guardianship of a man, whether a husband, father, or even a son. Wives must live in their husband’s cities; women like Chryseis or Briseis, who haveRead MoreThe Role Of Women And Their Effect On The War1458 Words   |  6 PagesNevertheless, another important element in The Iliad is the role of women and their effect on the war and their relationship with other characters. Scholar Mary R. Lefkowitz, argues that women had some independence and were under the supervisions of man. The scholar writes: In the Homeric epics women seem to have little independence; they were always under the guardianship of a man, whether a husband, father, or even a son. Wives must live in their husband’s cities; women like Chryseis or Briseis, who have beenRead MoreAnalysis Of Homer s The Iliad 966 Words   |  4 Pagestale, The Iliad. With action packed battles, heroes and mighty gods, these tales that are so incredibly detailed that the reader can picture the battles like they were happening right in front of them. The Iliad’s legends are so infamous that even after hundreds of years they are still being told in the 21st century. Between the fighting and the glory however, there are scenes with the hero’s wives and families pleading with their loved ones to cut these stories short. If the hero of Troy, Hector,Read MoreTroy By Wolfgang Petersen And Homer s Historic Epic Iliad1828 Words   |  8 PagesThe 2004 film Troy by Wolfgang Petersen and Homer’s historic epic Il iad both center on the Trojan War between the Achaeans and the Trojans, but with two distinct differences in coverage. During Homer’s era, these heroes, the great Achilles and Hector, were known to all, but in modern times they are not as prevalent and thus both artists needed to adapt their approach to this tale. Homer’s Iliad delves into the ninth year of strife with Achilles and Agamemnon‘s quarrel in full effect and the GreeksRead MoreTroy Versus Homers Illiad2234 Words   |  9 PagesTROY VS HOMERS ILIAD (A comparison between the two with a mix of movie reviewing) by Amber Shepherd When comparing the movie Troy, directed by Wolfgang Petterson, and The Iliad, written by Greek poet Homer we can clearly see that although Petterson has made an excellent film he has clearly left out certain aspects of the Iliad which really define the story. Both versions portray the Trojan War between Greece and Troy, Achilles killing Hector and King Priam visiting Achilles to ask for the bodyRead MoreHonor And Glory By Homer1574 Words   |  7 Pagestakes the lives of many men. Honor and Glory are what define the hero in the epic poem, The Iliad, written by Homer. Throughout the Iliad, honor and glory is the motivation behind the characters, there are different ways to obtain honor and glory, and the different views of honor throughout the epic poem. The idea of honor and glory are essential to understanding the motivation behind the characters in the Iliad. Glory was gained by the heroic actions and deeds. The best opportunity to gain honor wasRead MoreIliad Paper On Achilles And Agamemnon1182 Words   |  5 PagesIliad paper Achilles and Agamemnon are different and similar at the same time in The Iliad. The Iliad is an epic poem which was written by Homer that talks about the Trojan War between Greek and its allies and the Trojans as the result of Trojan prince Paris seduces the Spartan queen Helen, the wife of Menelaus, who is the brother of Greek king Agamemnon, the war lasts continually for many years. The Iliad not only includes the description of warriors, women, and war, but also emphasize the interferenceRead MoreCritical Analysis Of The Iliad1714 Words   |  7 PagesHomer’s Iliad is an epic tale that spans centuries. The story covers intense battles in which the Greeks take on the Trojans. Homer does a fantastic job of bringing the poem to life and uses the gods to show the scale of the tale. While the poem is well written and grabs the reader’s attention, upon further analysis one can conclude that there is a serious problem concerning the tension between personal desire and rati onal ethical thinking. Throughout the book this conflict appears time and timeRead MoreThe Iliad And The Odyssey1599 Words   |  7 PagesIn The Iliad and The Odyssey, Homer has different portrayals of the roles that women play in each epic. These differences are so striking that some readers have even argued that there is a possibility that a woman could have created The Odyssey, modeled after Homer’s Iliad. In The Iliad we see women represented as war prizes and slaves, vulnerabilities to men, and in positions of limited power. In The Odyssey however, we see women capturing men and keeping them as prizes, rising from a status ofRead MoreExamining Family Relationships in Literature: Examining Antigone, The Odyssey, and The Iliad880 Words   |  4 Pagesparental influence. We’ve seen the defiance of rulers, the mimicking actions of father and son, the comparison of siblings, and the rebellion of a son. Within the play Antigone, we see a relationship that tests the strength of ones personal convictions. We quickly learn that the dominant figure is a catalyst to her flawed characteristics. During this time, the cultural bias insinuated that women were the weaker sex and they were immediately given the title of inferior within any relationship

Russia Superstitions Free Essays

Customs that are more often regarded as superstition Mothers typically do not show their baby to anyone except the father, the midwife and other close relatives for forty days after the baby is born. Many nationalities have a set of rituals for the guests that they have to follow to see the baby for the first time. [1] Before leaving for a long journey travelers, and all those who are seeing them off, must sit for a moment in silence before leaving the house. We will write a custom essay sample on Russia Superstitions or any similar topic only for you Order Now It is often conveniently written off as a time to sit and think of anything one may have forgotten. 2] After someone has left the house on a long journey, their room and/or their things should not be cleaned up until they have arrived, or at least a day has passed if they are guests in a house. [2] Knocking on wood is practiced in Russia as in other countries. However Russians tend to add a symbolic three spits over one’s left shoulder (or simply with the head turned to the left), and Russians will often knock three times as well. Traditionally one was spitting on the devil (who is always on the left). 3] Breaking a mirror is considered bad luck in Russia, as is looking at one’s reflection in a broken mirror. The effect is also more severe than 7 years of bad luck (as in American culture). [4] On examination day, it is bad luck to make your bed, wear anything new, or cut your fingernails. [3] It is bad luck to use physical hand gestures to demonstrate something negativ e using oneself or someone else as the object. For example, when describing a scar you saw on someone’s face you should not gesture on your own face or someone else’s. If you must, you can demonstrate in mid-air. If one does it without realizing, it can be countered by making a hand motion towards the body part used and then an abrupt motion away (as if to pick up the bad energy and throw it away). [3] If one person accidentally steps on another person’s foot, it is common for the person who was stepped on to lightly step on the foot of the person who stepped first. It is said that they thus avoid a future conflict. [3] Birthday parties should be celebrated on or after one’s birthday, not before. So when one’s birthday falls during the week, it’s best to celebrate the following weekend. And never give someone birthday wishes before their birthday. 3] Talking about future success, especially boasting about it, is considered bad luck. It is considered better to be silent until the success has been achieved or to even sound pessimistic. [3] Returning home for forgotten things is a bad omen. It is better to leave it behind, but if returning is necessary, one should loo k in the mirror before leaving the house again. Otherwise the journey will be bad. [4] Many Russians consider giving sharp objects, like knives or scissors, as gifts, to be taboo. You can avoid this taboo taking symbolic little money, for example one Russian ruble, in exchange as if it is a trade, not a gift. 4] Birds that land on a windowsill should be chased away. If they tap on the window, or fly into it (open or closed) it is considered a very bad omen (often of death). [5] If a chicken crows at you three times before noon, the death of a close family member can be expected within a fortnight. The chicken should be killed, but not eaten, as consuming it will bring about further misfortune. [5] Things bought for a newborn baby (such as clothes, toys, furniture, etc. ) should only be purchased after the baby is born. This is usually done in a big hurry. 1] It is often considered taboo to step over people, or parts of their body, who are on the ground. It is often said that it will prevent the person from growing (if they are not fully grown already). It is better to politely ask the person to move or to find a way around them. If one accidentally steps over a person (or people), it is sometimes standard to step backwards over them. [3] Unmarried people should not sit at the corner of the table. Otherwise they will not marry. This mostly applies to girls, and often only young girls. Sometimes it is said that you will not marry for 7 years, making it all right for young children to sit there. 6] When giving an animal as a gift (a cat, dog, bird, etc. ), the receiver should give the giver a symbolic sum of money, for example one Russian ruble. [5] A purse (or any other money holder) as a gift requires a little money inside. Given empty it causes bad financial luck. [4] A funeral procession brings good luck. But one should never cross its path or it is bad luck. [7] A woman with empty water buckets coming towards you is considered a bad omen. [3] A group of two or more people should not talk on different sides of a tree. They should all keep to one side or the other. [3] Bread should only be cut with a knife, not with your hands. Otherwise, it is said, that your life will be broken. The opposite is held true by some people. [4] Two or more people should never use one towel at the same time to dry their hands or bodies, or it is said to bring conflict. [4] A stranger should not look at a newborn baby before it is a certain age (between two months and one year). If one looks at the baby it is considered bad luck to compliment it. Instead, one could say, â€Å"Oh, what an ugly child! â€Å". [1] It’s good luck to trip on your left foot. [3] One should never hand a knife directly to another person, as it is said that the two will get into a fight. Instead a person should always place the knife down on a surface, and only then can the other person pick it up. In several cases you can give it directly, but only pointing the sharp end to yourself and making the knife’s handle accessible for the opposite person. [4] If one feels that he or she may have been cursed by someone (had the â€Å"evil eye† put on them) or just has the feeling of a hostile presence, it is recommended to remove one’s coat and then put it back on starting with the hand opposing the usually used one. It is also recommended to pin a French Pin inside your clothing to avoid the curse of the evil eye in the first place. 3] One should not to shake hands or give something through a threshold. [3] Whistling in a house would bring misfortune to that household (see origins below). It is considered taboo to give something that is broken or has a defect as a gift. Before one takes an exam, someone else would say, â€Å" ! † which roughly translates to â€Å"neither fur, nor feather! † which means good luck. To this, the one taking the exam would reply, â€Å"? ! † which means, â€Å"Go to the Devil! † or â€Å"To the Devil! † which is a way of securing good luck How to cite Russia Superstitions, Essay examples

Everybody grows up as a kid in different environme Essay Example For Students

Everybody grows up as a kid in different environme Essay nts, but they all are treated the same in terms of their gender. In society today, baby boys are wrapped with blue clothing, and baby girls are wrapped with pink clothing. Boys play with trucks, and girls play with dolls. These are some examples of how our society has carried on a tradition of putting different sexes in gender roles. If people do not follow these roles, they are considered abnormal. These people of diversity then become discriminated against. Todays society is ever changing, and now more than ever there is a great diversity throughout our nation. Gays and lesbians are all examples of some of the sexual diversity in our culture. People are always being harassed or physically abused just because of who they are or what they believe in. Discrimination is a big problem today. Society needs to understand that everybody comes from different backgrounds and has different beliefs. I think a lot of this violence comes from the environment in which they were brought up. I know that a great deal of my morals and ethics come from my parents. They always set a good example when I was a kid, and I learned from that. A person who grows up in a racist home is a lot more likely to be racist themselves when they grow up. I think, as time goes on, many of these attitudes will fade away. Discrimination is a problem that must be faced today, or else these attitudes may never change. We will write a custom essay on Everybody grows up as a kid in different environme specifically for you for only $16.38 $13.9/page Order now Today, there are many men and women who are homosexual. As time goes by, more people seem to choose this type of lifestyle. Just because these people are different than most, society perceives them in a negative light. It is the same as saying I could either become an engineer or be a businessman, but it does not matter what I choose, just like a person can choose to be heterosexual or homosexual. Many people discriminate against homosexuals both physically and emotionally. Some people view homosexuals as being less than human, so they treat them that way. Our society needs to be more open to our countrys large diversity. We all are different in some way, and there is no reason that we should look down on homosexuals. My best friends brother, Kenny, is gay, and he is one of the coolest individuals I know. Whenever I see him, I dont see a gay person, but a really good friend. He was one of the first people to admit he was gay in our high school and received a lot of criticism for it. My friend and I thought he was gay before he admitted it. He just seemed to do things a little differently than other males did. For example, we heard stories of him playing with dolls when he was young, and he never had a girlfriend. His parents are okay with it, and he has several very supportive friends. Along with the support he has from his friends, he has a very strong character. Currently, he has a well paying job and an apartment over looking New York City and the Lincoln Tunnel. He is attending John Jay Graduate School and receiving straight As in forensic science. He has come a long way since high school and I even look up to him in what he has accomplished. He doesnt have a partner but spends most of his time working hard at getting a good education. He is a good example of how I view gay people.I dont care what sexual orientation a person is; I look at them as a person, and if I think they are cool, I will hang out with them. There are many hate crimes today that involve homosexuals. Recently, a twenty-one year old from the University of Wyoming, Matthew Shepard, was severely beaten and then murdered. Two men tied him to a fence then bashed his skull with the butt of a gun. He was in the hospital for several days; then with the trauma of the injuries, he just died. This is very sad in that he was killed for his sexual orientation. He didnt do anything to provoke his killers, which makes it a hate crime. These killers took the life of an individual who meant a lot to many people. Hate crimes are committed to cause fear or injury to people simply because of who they are, not for what they might have done. Hate crimes also make the community in which the crime happened fearful and vulnerable. The whole community must then become more aware of strangers and walking at night.One thing about hate crimes is that they not only affect the victim, but also the family and friends. The loss of a family member causes much grief, especially a person who had a long future ahead of him. Also, they affect the group of people to which the crime was directed. For instance, Shepard was gay and now Wyomings gay community must watch their backs every time they walk out of the house. .uf956712623dc7d49c0cd50e5f854d267 , .uf956712623dc7d49c0cd50e5f854d267 .postImageUrl , .uf956712623dc7d49c0cd50e5f854d267 .centered-text-area { min-height: 80px; position: relative; } .uf956712623dc7d49c0cd50e5f854d267 , .uf956712623dc7d49c0cd50e5f854d267:hover , .uf956712623dc7d49c0cd50e5f854d267:visited , .uf956712623dc7d49c0cd50e5f854d267:active { border:0!important; } .uf956712623dc7d49c0cd50e5f854d267 .clearfix:after { content: ""; display: table; clear: both; } .uf956712623dc7d49c0cd50e5f854d267 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .uf956712623dc7d49c0cd50e5f854d267:active , .uf956712623dc7d49c0cd50e5f854d267:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .uf956712623dc7d49c0cd50e5f854d267 .centered-text-area { width: 100%; position: relative ; } .uf956712623dc7d49c0cd50e5f854d267 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .uf956712623dc7d49c0cd50e5f854d267 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .uf956712623dc7d49c0cd50e5f854d267 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .uf956712623dc7d49c0cd50e5f854d267:hover .ctaButton { background-color: #34495E!important; } .uf956712623dc7d49c0cd50e5f854d267 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .uf956712623dc7d49c0cd50e5f854d267 .uf956712623dc7d49c0cd50e5f854d267-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .uf956712623dc7d49c0cd50e5f854d267:after { content: ""; display: block; clear: both; } READ: Endangered Species EssayWe should make new laws that will make the penalties for such crimes a lot harsher. This may decrease the amount of these crimes committed each year. If we continue with the current laws, how can we expect a change in the attitude of some Americans? Obviously, the laws of today are not adequate enough to force these crimes to fade away. Maybe the only way to solve this problem is an eye for an eye. With a hate crime like Matthew Shepards, the killer or killers should die as well. Just as the killers might have hated homosexuals, society hates killers. So we may want to consider putting to use the death penalty in these cases. These crimes dont only happen to male homosexuals. Homosexuality in women has many similarities and differences. They share an interest in the same sex and stick out as being gay in our society. Using the word gay or fagot also offends both sexes. Besides these similarities, there are also some differences. Hate crimes seem to happen more to gay men than gay women. I rarely see a news headline of a women getting beaten just because she is gay. Though, thats not always the case. A couple of years ago, there was an abduction of two lesbian activists. Roxanne Ellis and Michelle Abdill were found murdered in a pick-up truck. They were tied up side by side and shot in head. This sparked a Gay and Lesbian Task Force to write a letter to Janet Reno to stiffen hate crime laws. In the letter, it says that Our concern is that however the facts in this case turn out, hate crimes against gays, lesbians, bisexuals, and transgender persons continue to be an epidemic in this country. In the atmosph ere of hatred and gay baiting which are expected to be brought up in next years anti-gay ballot, it is clear that such crimes will increase.(http://www.ngltf.org/press/oregon.reno.12.12.95.html) This is why something must be done soon. This task force as well as others are working hard to make the laws tougher on these gay bashers. If these groups werent around, these crimes of hate would still be a problem in the future. A gay person has the same right to live a free life without worry of being beaten or killed over their sexual preference. Discrimination takes place everyday. I hear it in the cafeteria, see it in the movies, and watch it on television. I think this helps develop many of the negative attitudes in people today. Groups of friends use gay as a derogatory term to offend others. This is not right; it is offensive to others not even being made fun of. This term can be associated with others such as nigger or kyke. These are very offensive, not only to one but to many peo ple. What do you think our world would be like if we let hate crimes continue and dont try and change the attitudes of our society?Does our environment while growing up effect our attitudes as we grow older?