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  • LiCB(11)(CH(3))(12)-catalyzed radical polymerization of isobutylene: highly branched polyisobutylene and an isobutylene-ethyl acrylate copolymer.

LiCB(11)(CH(3))(12)-catalyzed radical polymerization of isobutylene: highly branched polyisobutylene and an isobutylene-ethyl acrylate copolymer.

Journal of the American Chemical Society (2009-02-14)
Victoria Volkis, Hua Mei, Richard K Shoemaker, Josef Michl
PMID19215097
ABSTRACT

In the presence of LiCB(11)Me(12) catalyst and a nonoxidizing radical initiator, isobutylene undergoes radical chain polymerization in an inert solvent at ambient temperature and pressure to give a new highly branched form of polyisobutylene. Copolymerization with ethyl acrylate is also possible.

MATERIALS
Product Number
Brand
Product Description
295469
Sigma-Aldrich
2-Methylpropene, 99%
181463
Sigma-Aldrich
Polyisobutylene, average Mw ~1,000,000, average Mn ~600,000 by GPC/MALLS, average Mv ~1,200,000
181455
Sigma-Aldrich
Polyisobutylene, average Mw ~500,000, average Mn ~200,000 by GPC/MALLS, average Mv ~420,000