3.2 Using acrylic acid as a monomer, CH₂CH(COOH), (or look up the structure on-line), illustrate A. a syndiotactic oligomer with degree of polymerization (n or x) = 4. B. an isotactic oligomer with degree of polymerization = 5. C. a head-to-head addition of acrylic acid groups. Use hydrogen atoms for the end groups.

3.2 Using acrylic acid as a monomer, CH₂CH(COOH), (or look up the structure on-line), illustrate A. a syndiotactic oligomer with degree of polymerization (n or x) = 4. B. an isotactic oligomer with degree of polymerization = 5. C. a head-to-head addition of acrylic acid groups. Use hydrogen atoms for the end groups.

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter14: Chemical Equilibrium

Section: Chapter Questions

Problem 93AP

See similar textbooks

Similar questions

2
Mm.19.
What is the degree of polymerization of each of the following polymers with molar mass 100,000 g/mol ? (a) polyacrylonitrile (b) polycaprolactam (c) poly(trimethylene ethylene-urethane) [Ans. (a) 1887; (b) 885; (c) 532] 1.3
( do complete with explanation plz )
Q.2: Discus the kinetics of addition polymerization reaction.
7)
1. What is Tacticity, show syndiotactic, isotactic and atactic polymer. Which is easiest to crystallize and why.
(5) Determine (if possible) which polymer is more likely to crystallize: a) branched atactic polypropylene vs. linear syndiotactie polypropylene b) network melamine (pg. A36) vs. lightly-crosslinked (5%) polyethylene c) linear polyethylene vs. linear polystyrene d) graft poly(styrene-butadiene) vs. alternating poly(chloroprene-isobutylene) e) heavily-crosslinked polyethylene terephthalate (PET) vs. phenol-formaldehyde
8. When an equilibrium step-growth polymerization is 99% complete, what fraction of the reaction mixture is still monomer (a) on mole basis and (b) on weight basis ?
(4) Polybenzimidazoles are made by a two-stage step-growth melt polymerization: H2N- - NH2 -H20 H2N NH2 -фон What extent of reaction is needed to produce n = 200 in the above formula? Carry four decimal places in your answer.
8. For the following molecule, draw the monomers (3T) *Hint* there are three different monomers a. What byproducts (if any) would form during this polymerization? b. Type of polymerization that occurred: (1T) (1T) N. H2N СООН N. H. CH3 ZI
11c. Nylon 6 and poly(ε-caprolactone) have similar polymer backbone structure with one carbonyl, 5 methylene and a heteroatom, nitrogen or oxygen, respectively. Each is able to undergo crystallization. However, their thermal transition temperature differs significantly. The glass transition temperature (Tg) for Nylon 6 is 52 °C, whereas the Tg for poly(εcaprolactone) is 112 degree lower than Nylon 6 at – 60 °C. Similarly, the melting temperature (Tm) for Nylon 6 is 223 °C, whereas the Tm for poly(εcaprolactone) is 60 °C. Briefly explain the significant differences in the thermal properties of these two polymers.