Chemistry Reference
In-Depth Information
Section 3.10
1. What is thermal polymerization? Show by chemical equations the postulated mechanism of
formation of initiating radicals in styrene thermal polymerization.
Section 3.11
1. Show the proposed charge-transfer mechanism for copolymerization of styrene with maleic
anhydride and dioxene with maleic anhydride.
2. What determines the stability of charge-transfer complexes? Explain and give examples.
Section 3.12
1. How do some polar monomers complex with Lewis acids? How does that affect polymerization of
these monomers? Copolymerization?
Section 3.13
1. How can canal complexes be used for steric control
in free-radical polymerization? Give
examples.
Section 3.14
1. How do controlled/“living” polymerizations differ from typical living polymerizations?
2. List the different types of controlled/“living” free-radical polymerizations that you can think of.
What are the three classes of homogeneous controlled/“living” polymerizations as described by
Matyjaszewski? Illustrate.
3. Describe cobalt mediated polymerizations. Illustrate.
4. Describe and illustrate atom transfer polymerizations controlled by copper/bipyridine complex
and by carbon tetrachloride, dichloro(triphenyl-phosphine)-ruthenium(II), and methylaluminum
bis(2,6-di-
tert
-butyl-phenoxide). Explain what (
ARGENT
)
ATRP
and (SET-
LRP
) mean. Illustrate
the proposed Percec mechanism and the Matyjaszewski mechanisms.
5. Describe nitroxyl radical mediated polymerizations. Illustrate TEMPO controlled polymerization
of styrene. What is meant by in situ NMP?
6. Explain and illustrate a reversible addition-fragmentation chain transfer polymerization (RAFT).
7. Write the Matyjaszewski proposed kinetic equation of ATP polymerization.
