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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. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit

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

3. Formation of side chains along the backbone; presence of branches disrupts the interactions beween adjacent chains; lowering the tensile strength - melting point - stiffness - crystallinity - and density

4. Softening agents

5. Polymer that is made up a single repeat unit

6. Covalent bonding of the polymer backbone and side groups

7. Low- molecular- weight building blocks repeated in the polymer chain

8. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed

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

10. Simple polymeric material produced as pellets in large quantities

11. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)

12. Polymers comprised of two or more different monomers that attach to the chain in long runs of one type of monomer - followed by another monomer AAAAAAAAAAAAABBBBBBBBBBBBBBBBBBAAAAAAAA

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

14. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.

15. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel

16. Additives whose primary purpose is to reduce the final cost of the product

17. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets

18. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air

19. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer

20. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals

21. Smallest repeating unit in a polymer. aka repeat unit

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

23. Process used to make thermoset fibers by performing the polymerization reacting in a solbent as the material flows through a spinneret and into a quenching bath

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

25. 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

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