Macromers homopolymerization

An additional observation concerning MACROMER is that it will not homopolymerize, and thus did not have to be stabilized. 

Ring opening, cationic homopolymerization of these macromers using Et2 a branches. 

Macromer may be homopolymerized, even though their molecular weights are... 

Figure 7 indicates that the rate of the individual conversion of the macromer is much slower than that of ethylene oxide, suggesting that in the early stages of copolymerization some amount of ethylene oxide homopolymer is produced and may be found in the product This can be explained by the fact that molecular weight of the macromer is thousands of times larger than that of ethylene oxide and the mobility of the macromer is therefore much smaller than that of ethylene oxide. Also, the steric hindrance is much larger in the macromer than in ethylene oxide. After most of the ethylene oxide is consumed, the phenyl content of the product increases gradually with copolymerization time. Since the macromer does not homopolymerize easily due to... 

Methacrylate-substituted POSS macromers have been made that contain one polymerizable functional group. These macromers have been both homopolymerized and copolymerized (Fig. 8a). Propyl methacrylate-substituted POSS monomers 9 and 10, containing seven nonreactive cyclohexyl and cyclopentyl groups, respectively, are examples. SolubiUty differences between the MA-POSS monomers 9 and 10 were observed in THF, toluene, and benzene. The cyclohexyl-substituted MA-POSS 9 has approximately twice the solubility of the cyclopentyl-substituted MA-POSS 10. Furthermore, monomer 9 displayed a broad two-step thermal transition beginning at 187°C, which involves melting, thermal polymerization and decomposition, whereas 10 gave a similar thermal transition beginning at 192°C. X-ray... 

Percec, V., Rinaldi, P.L., and Auman, B.C., Comb-Like Polymers and Graft Copolymers from Macromers 2. Syntesis, Characterization and Homopolymerization of a Styrene Macromer of Poly(2,6-Dimethyl-J,4-Phenylene Oxide). Polymer Bulletin, 1983. 10 p. 397-403. 

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