Chemistry Reference
In-Depth Information
Section 4.4
1. What are the two types of initiations in anionic polymerization?
2. Describe and illustrate by chemical equations the initiation mechanism m a homogeneous
polymerization by addition of an butyllithium to an olefin in a polar solvent What is the effect
of heteroatoms. such as oxygen present in the monomers? illustrate.
3. Describe and illustrate one electron transfer initiations of anionic polymerization and give several
examples.
4. Describe initiations and propagation by Alfin catalysts.
5. Discuss electoinitiation of anionic polymerization.
6. How does the propagation reaction in anionic polymerization differ in the presence of polar and
non-polar solvents?
7. How do structures of monomers influence propagation rates in anionic polymerizations?
Illustrate.
8. Discuss steric control
m
homogeneous anionic polymerization of methyl methacrylate in non-
polar solvents.
9. Discuss steric control in homogeneous anionic polymerization of isoprene on none-polar solvents.
10. Discuss steric control in homogeneous anionic polymerizations in polar solvents.
11. Discuss and illustrate hydrogen transfer polymerization of acrylamide.
12. How do termination reactions take place in anionic chain-growth polymerization?
13. Discuss living anionic polymerizations.
14. How are living monodisperse methyl methacrylate polymers prepared with the aid of enolate
aluminum porphyrin intermediates? Explain and illustrate.
Section 4.5
1. What metals form catalysts in Ziegler-Natta coordinated anionic polymerization.
2. Illustrate the reactions that takes place between aluminum alkyls and transition metal
compounds, like titanium chloride, in formations of Ziegler-Natta catalysis.
3. Describe the bimetallic polymerization mechanism of G. Natta.
4. Describe the Cossee and Arlman mono metallic mechanism.
5. Describe steric control in heterogeneous coordinated anionic polymerizations.
6. What are the homogeneous Ziegler-Natta catalysts?
7. Discuss steric control with homogenous catalysts.
8. Describe the currently used industrial Ziegler-Natta catalysts on support and soluble ones.
9. Discuss effects of Lewis bases on Ziegler-Natta typo coordinated anionic polymerizations.
10. What is the termination reaction in coordinated anionic polymerizations. Illustrate.
11. Describe the transition metal oxide on support catalysts, how they are prepared and used.
12. Describe the metallocene catalysts.
13. How does isomerization polymerization take place by coordinated anionic mechanism?
Section 4.6
1. Describe cationic polymerization of aldehydes.
2. Describe anionic polymerizations of aldehydes
