Have you ever wondered why the plastic bag that you left on the porch during winter cracks or breaks more easily than when you left it during summer time but a piece of wood which was left just like the plastic bag has no effect whatsoever? This is because of a phenomenon, which only happens to polymers, known as the glass transition. For each polymer, there is a certain temperature at which the amorphous polymers undergo a second order phase transition from a rubbery and viscous amorphous solid to a brittle and glassy amorphous solid called the glass transition temperature, Tg.1 When the polymer, or in this case, the plastic bag, is cooled below their glass transition temperature, it becomes hard and brittle like a glass but when it is used above their glass transition temperatures, it might have a different effect than when used at room temperature or below the glass transition temperature as normally, different types of polymers like clothes, food packaging, insulations for wires, etc. are either used above their glass transition temperatures or …show more content…
Glass transition is not the same as melting. Melting (or freezing, or boiling or condensation) undergoes a change in heat capacity and a latent heat is involved or in another term, melting is a first order transition that only occurs in crystalline polymers. However, for glass transition, it is a second-order transition that only occurs in the amorphous polymers and does not involve latent heat since amorphous polymers have a relatively weak intermolecular forces that bond them together and can be broken once heat is applied whereas crystalline polymers have a strong primary (cross-linking) covalent bonds. Glass transition temperature and melting temperature can occur in the same process because in a semi-crystalline polymers, both amorphous and crystalline regions exist where the amorphous polymers undergo only the glass transition and the crystalline polymers undergo only
In the memoir The Glass Castle by Jeannette Walls, the author's earliest memory is her injury at the age of three, and in this memory she is all but unhappy. Jeannette's childhood was full of inconveniences. The Walls family had a hard time conforming to society and shaping their future life for success. Rex and Rose Mary had different morals than others when it came to raising their children: Brain, Lori, Maureen and of course Jeannette. During her childhood, Jeannette was dealt with hardships, but showed maturity and independence throughout it.
“Life with your father was never boring.” – Rose Mary Walls. Rose Mary Walls, Jeannette Walls’s mother and Rex Walls’s spouse, reminisces life with Rex, which included migrating very frequently, refusing to conform, and advocating self-sufficiency. In Jeannette Walls’s The Glass Castle, Walls reveals that there are turbulence and order in life, the influence of family, and how she develops as she grows up through Walls’s recollection of her life, from living in a nomadic household, where her parents neglect their children, to living in a squalid hovel with no plumbing, and finally living in New York City, where she works as a journalist.
GLASS written by ellen hopkins intermenes the real life struggles that teenagers face everyday, from love to drugs to destructive relationships. Ellen really hits home showing the life of a once 4.0 honors student Kristina; whose life easily got turned upside down from one toxic summer at her fathers that will show the darkest side possible of life. An estimated 12 percent of children in the United States live with a parent who is dependent on or abuses alcohol or other drugs. Based on data from 2002 through 2007, it was to be reported that 8.3 million children under the age of 18 lived with at least one substance-dependent or substance-abusing parent according to Substance Abuse and Mental Health Services Administration (Paragraph 4). The bond between a child and their parents is so pure yet
My family isn 't like the Walls family because my parents would never treat my sister and I like their parents treated them, my family and I have a decent living situation, and we would never hurt any animal. From the beginning, Rex and Rose Mary treated their kids wrong and didn 't take responsibility as parents. Every child deserves a loving home and should never have to worry if they are going to eat that night. West Virginia also seemed a lot different then because the laws are more strict now. The way the Walls are, they would get in trouble for the way they treated their kids, animals, and even their living space. "Mom always said people worry too much about their children. Suffering when you 're young is good for you, she said. It immunized
When Holden enters the museum he notices all the glasses cases and he comes to a moment of realization. The structures inside the glass case represent what he wants from his life. He doesn't want time progress he would just like to be frozen in time living in his best moments. If he could, he wouldn't be so depressed and his life would be flawless. He might be wanting to put a moment when he was younger and he was happy with his family and want to keep it in there. This was when his brother was still alive and he hadn't learned the term phony. He wouldn't want that to progress, but he notices that as time goes by his dream will never be accomplished.
The Glass Castle was overall very strange. Written by Jeannette Walls in her point of view, this book is her memoir that she wrote to share her story with the rest of the world. It won the 2005 Elle Readers’ Prize and the 2006 American Library Association Alex Award. The title comes from an unkempt promise from Jeannette’s father, but rather than seeing it as a letdown, Jeannette remembers it as a hope that things will get better, a trait she must have received from her mother. While The Glass Castle focuses mainly on her immediate family, she later wrote another book, Half Broke Horses, about her grandmother, Lily Casey Smith.
In today’s society not many people realize that they are thankful to wake up and live another day. Just imagine being lost at night in an area you are completely unfamiliar with. Imagine it being cold, and you having no clothing. You don’t have any money and you are starving. Now, all your ears hear are the screams of the one’s around you being killed. To add to the torture, you are unable to control your next move, nor the next. There is constant death, starvation, and suffering happening all around you, but you cannot do anything to help the situation besides fending for yourself to survive. This is the devastating and cruel world that Chanrithy Him’s When Broken Glass Floats introduces to its readers.
Ever think you are in control only to find out that you are not and you are in way over your head? Well, that is the life that Kristina Georgia Snow has everyone follow in Glass. Glass is the continuing book of Crank. Crank is about a innocent,17 year old girl named Kristina, who is on her way to graduating early when she has to go spend one month in the summer with her estranged father. While at her fathers house, she tries crank for the first time and falls in love with the monster. The book follows her journey with the monster and the consequences that come with it like hurting her friends and loved ones. The book ends with the teen becoming pregnant due to a product of rape. Glass picks up shortly after Kristina Snow, also known by her "alter ego" Bree, has the baby. She names her baby Hunter Seth.
Rex Walls While growing up in life, children need their parents to teach them and lead them on the path to a successful future. In the Glass Castle Rex Walls, Jeannette’s father, neglects to take care of his duties as a father figure in Jeannette’s life. In the same way, he teaches her to be strong and independent at a very young age. As we read through the story, we see the special relationship that Jeannette shares with her father. Even though he, in many instances, failed to protect his children, refused to take responsibility for them, and even stole from them, Jeannette still loved him until his death for two reasons: one, for his ability to make her feel special, and two, because he is a never-ending source of inspiration.
To understand the state of glass we must first have an understanding of the different states of matter. All matter is composed into states, and may move through these four existing states. The solid state is where the atoms of a substance are closely pact together with the only movement being the vibration of the atoms. The liquid state is where atoms are placed together in no order with a definite volume, but may move past each other giving it no definite shape. According to Science Magazine’s article in 1926 , glass exhibits traits from both of these states. It is similar to a liquid in that its atoms are randomly arranged, yet it has the fixed rigid bonding of a solid as well as the same high heat capacity(Science). This article in Science Magazine is a bit dated though and science changes drastically through years, especial...
Jeannette Walls did not have your average childhood. She grew up poor and neglected and faced many hardships as a child. Many of the problems she faced as a child were caused by her parents. Her mother, Rose Mary, clearly suffers from narcissistic personality disorder which affects not only Jeannette but the entire family. It is evident throughout the entire story that Rose Mary clearly puts her wants and needs ahead of her childrens showing her narcissistic tendencies.
Throughout the Glass Castle there is a constant shift in Jeanettes tone through her use of diction. Her memoir is centered around her memories with her family, but mainly her father Rex Walls. Although it is obvious through the eyes of the reader that Rex is an unfit parent and takes no responsibility for his children, in her childhood years Jeanette continually portrays Rex as an intelligent and loving father, describing her younger memories with admiration in her tone. The capitalization of “Dad” reflects Jeannette’s overall admiration for her father and his exemplary valor. “Dad always fought harder, flew faster, and gambled smarter than everyone else in his stories”(Walls 24). Jeanette also uses simple diction to describe her father, by starting sentences with, “Dad said,” over and over. By choosing to use basic language instead of stronger verbs, she captures her experience in a pure and honest tone.
Fire. Neglect. Sexual Molestation. No one child should have to face what Jeannette Walls had to endure as a young child. However, Walls clearly shows this chaos and the dysfunctional issues that she had to overcome while she was growing up. Within her memoir, The Glass Castle, Walls incorporates little things that were important in her life in order to help the reader understand her story even more. These little things amount to important symbolisms and metaphors that help to give the story a deeper meaning and to truly understand Jeannette and her family’s life.
Generally when some one writes a play they try to elude some deeper meaning or insight in it. Meaning about one's self or about life as a whole. Tennessee Williams' "The Glass Menagerie" is no exception the insight Williams portrays is about himself. Being that this play establishes itself as a memory play Williams is giving the audience a look at his own life, but being that the play is memory some things are exaggerated and these exaggerations describe the extremity of how Williams felt during these moments (Kirszner and Mandell 1807). The play centers itself on three characters. These three characters are: Amanda Wingfield, the mother and a women of a great confusing nature; Laura Wingfield, one who is slightly crippled and lets that make her extremely self conscious; and Tom Wingfield, one who feels trapped and is looking for a way out (Kirszner and Mandell 1805-06). Williams' characters are all lost in a dreamy state of illusion or escape wishing for something that they don't have. As the play goes from start to finish, as the events take place and the play progresses each of the characters undergoes a process, a change, or better yet a transition. At the beginning of each characters role they are all in a state of mind which causes them to slightly confuse what is real with what is not, by failing to realize or refusing to see what is illusioned truth and what is whole truth. By the end of the play each character moves out of this state of dreamy not quite factual reality, and is better able to see and face facts as to the way things are, however not all the characters have completely emerged from illusion, but all have moved from the world of dreams to truth by a whole or lesser degree.
The explicit presentation of the mathematics involved in the Arrhenius equation (Michels, Tsong, and Smith 1983) rendered the parameters involved in glass hydration understandable. However, the actual implementation of the physical processes described in the mathematical equations into a model replicating the natural environment is a complicated problem hard to solve (Stevenson 1998).