5. Which of the following "isomeric" polymers would you expect to exhibit the greater crystallinity? Explain. Chemical Structure and Polymer Morphology 8. Which of the following "isomeric" polymers would you expect to exhibit the greater crystallinity? Expl (a) CH₂CH₂CH- or CH₂CH OCH.] (b) CH, [ECH). COCH, Jon of CH₂ (c) -CH₂CF₂ or or -CHFCHF- [EICH, EOCH.CHCH,Of CH₂CH₂ 9. When poly(tetramethylene adipate) (a polymer of interest for "crystallinity initially increases surgical sutures) i jected to hydrolytic or enzymatic degradation, the polymer's percent does this suggest about the degradation process? (A.-C. Albertson and O. Ljunquist, J. Macromo Chem.. A23, 393, 1986) 10. One method of determining percent crystallinity in a polymer involves inverse gas chromatograph is, the polymer in question is used as the stationary liquid phase coated on the column packing. Sp

(a)Is this a condensation or addition polymer? Explain how you know. (b) Provide the IUPAC name of the monomer that does not contain the benzene group.

d) Early in the polymerization at lower conversion of the MVK monomer, the polymer chains formed are primarily linear. However, close to the end of the reaction, as most of the monomer is consumed, branched polymers may start to appear. Propose a possible rationale for the formation of branched polymer structures (hint: consider the types of termination reactions that may compete with polymerization when only little monomer is still present). 로 3 3 linear vs. branched

1. What is Tacticity, show syndiotactic, isotactic and atactic polymer. Which is easiest to crystallize and why.