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Modern Material Science And Engineering 2
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Modern Material Science And Engineering 2
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25 Questions

1. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret

2. Pigments or dyes that change the way light is absorbed or reflected by a polymer

3. Carbon atom capable of multiple configurations due to four different substituents

4. Specific arrangements of atoms that cause organic compounds to behave in predictable ways

5. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...

6. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability

7. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer

8. Polymer made up of two of more differenet monomers covalently bonded together

9. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants

10. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties

11. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion

12. Arrangement of the largest substituents where the substituets are offset by 120

13. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.

14. One method of expressing the molecular weight of sample of polymers with averaging based on weight; this method is more useful when large molecules in the sample dominate the behavior

15. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance

16. Polymer that is made up a single repeat unit

17. Additives that cause swelling - which allows the polymer chains to slide past one another more easily - making the polymer softer and more pliable. also used to decrease the viscosity of cement paste to make it easier to flow

18. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination

19. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern

20. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain

21. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants

22. Number of bonds a molecule has formed

23. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color

24. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed

25. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device

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