ch 27 polymers
DESCRIPTION
Ch 27 Polymers. 1. Show the mechanism for the following chain-growth polymerizations with the given monomers: Radical polymerization, monomer: CH 2 CHCl Cationic polymerization, monomer: CH 2 CHOCH 3 Anionoic polymerization, monomer: CH 2 CHPh Ring-opening polymerization, monomer:. - PowerPoint PPT PresentationTRANSCRIPT
Ch 27 Polymers
1. Show the mechanism for the following chain-growth polymerizations with the given monomers:
a.Radical polymerization, monomer: CH2CHCl
b.Cationic polymerization, monomer: CH2CHOCH3
c.Anionoic polymerization, monomer: CH2CHPh
d.Ring-opening polymerization, monomer: O
Ch 27 Polymers2. List the following monomers in order of decreasing ability to undergo:
a.Cationic polymerization
a.Anionic polymerization
CH2 CHOCH3 CH2 CCH3
CH3
CH2 CH C
O
OCH3
CH2 CHCl CH2 CHCH3 CH2 CHCN
Ch 27 Polymers3. The following is a chain-growth polymer made from a single monomer type.
a.Why are there variations in the polymer chain?
b.Draw the monomer.
Ch 27 Polymers4. Explain how the following may influence polymer properties:
a.Chain transfer
b.Branching
c.Cross-linking
Ch 27 Polymers5. Natural rubber is a polymer of isoprene.
a.Draw the structure.
b.What is vulcanization?
Ch 27 Polymers6. Define copolymer and give examples of four types.
7. What is a plasticizer?
Ch 27 Polymers8. Give the structure of the condensation polymer resulting from the following monomers:
a.
b.
c.
O
Cl
O
Cl + NH2(CH2)6NH2
O
O
O+
HOH2C
HOH2C
N NC C
O O + HOCH2CH2OH
Ch 27 Polymers9. What monomer(s) would be used to make the following polymers?
a. d.
b.
c.
CH CH2
OC
O
CH3
CH CH2
OC
O
CH3
CH CH2
OC
O
CH3
CC NHCH2CH2NH-
O O
Cl n
O O
n