Nonideal Formation of Network Polymers
Final rept. Jan 1988-Jan 1992
MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMICAL ENGINEERING AND MATERIALS SCIENCE
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The majority of networks are formed from small monomers, typically with molecular weights less than 500, and often close to 100. In these polymerizations functional groups are close together, and hence may influence one another in a number of ways groups on the same monomer may not be equally reactive their reactivity may change as nearest neighbors react and wasted cycles may form. -Conversely network formation may alter the polymerization, for example through phase separation or through a glass transition leading to incomplete conversion. Network formation from small monomers under such nonideal conditions was the focus of our research, which covered the effects of the following nonidealities first-shell substitution effect cyclization instep and chainwise systems chainwise mechanisms during network formation free-radical, anionic, and secondary site generation diffusion and filler and the interactions of filler vith polymer. network Polymers, cyanates, vinyl-divinyl networks, cycle.
- Polymer Chemistry