chap10 - Chap 10 Polymers 1 polymers from Greek...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Chap 10 Polymers 1. polymers- from Greek meaning " poly" many and " meros " meaning many parts. A-A-A-A-A-A-A- made from smaller molecules called monomers. How to write polymers- -(CH 2 -CH 2 ) n - means that this is the repeating monomer. Ex. 10.2 CH 2 =CHF is the monomer. The polymer is 2. Thermoplastic and thermosetting polymers. a. Thermoplastic polymer- can be softened by heat and pressure and then reshaped. Linear or branched polymers can slide past each other. b. thermosetting polymers- harden permanently when formed. Due to cross linking of the polymer. 3. Glass transition temp. T g Above this tempo the polymer is rubbery and below is tough like glass, stiff and brittle. For tires we want low T g . 3. Crystalline and amorphous polymers- a) Crystalline polymers- molecules line up neatly to form long fibers of high tensile strength. Make good synthetic fibers. b) amorphous- composed of randomly orientated molecules that get tangled up. Make elastomers. C H 2 C F C H 2 C F C H 2 C F H H H
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Spandex is a mixture of both. Spandex for ski pants and exercise clothing, blocks of one polymer with other blocks. 4. Composites- high strength fibers (of glass, graphite, or ceramics) held together by a polymeric matrix, usually a thermosetting condensation polymer 3. Natural polymers- get overhaed of table 10.1 a. Starch- made up
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern