Chemistry Reference
In-Depth Information
Section 9.6
1. What is meant by microporous and macroreticular supports.
2. Discuss some applications of polymeric reagents. Show examples.
3. How are enzymes immobilized? Discuss, showing chemical reactions.
4. Discuss nonenzymatic catalysts.
Section 9.7
1. What is the mechanism of free-radical graft copolymer formation by chain-transferring technique.
Explain by examples and discuss advantages and disadvantages.
2. Discuss free-radical grafting reactions to polymers with double bonds. Give examples and show
reactions.
3. How can macromonomers be used to form graft copolymers? Give several examples.
4. How can polymerizations be initiated from the backbones of the polymers? Explain and give
examples.
5. Discuss photochemical preparation of graft copolymers.
6. How is high-energy radiation used to form graft copolymers?
7. Discuss formations of graft copolymers by ionic chain-growth and step-growth polymerizations.
Section 9.8
1. Discuss advantages of block copolymers over polymer blends.
2. How can block copolyesters be formed? Explain with chemical equations.
3. How can block copolyamides be formed? Explain as in Question 2.
4. How can polyurethane-polyamide and polyamide-polyester block copolymers be formed? Explain
and show chemical reactions.
5. What are polyurethane ionomers? How are they prepared?
6. Describe the technique for preparation of block copolymers of poly(
-olefins).
7. How do block copolymers form in simultaneous free radical and ionic chain-growth polymerizations?
Explain and give examples.
8. Discuss formations of block copolymers by homogeneous ionic copolymerization.
9. How can block copolymers form by mechanochemical techniques?
a
Section 9.9
1. What is meant by polymer degradation and what are the various causes?
Section 9.10
1. What is the common technique for studying thermal degradation of polymers?
2. Explain the two thermal degradation processes in chain-growth polymers?
