Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1401157 | European Polymer Journal | 2007 | 9 Pages |
Abstract
Strategies for preparing graft copolymers from brominated poly(isobutylene-co-isoprene) (BIIR) are demonstrated. Selective dehydrohalogenation of the allylic bromide functionality within BIIR to give an exo-conjugated diene is described, along with subsequent cycloadditions of maleic anhydride (MAn) and its mono-ester and di-ester derivatives. Alcoholysis of the bicyclic anhydride product of BIIR dehydrobromination/MAn cycloaddition is used to produce an IIR-g-PE copolymer in low yield. An alternate approach involving bromide displacement from BIIR by the salts of maleate half-esters is shown to be an efficient means of generating isobutylene-rich copolymers containing polyethylene, polyethylene oxide and polycaprolactone grafts.
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Authors
J. Keith McLean, Sergio A. Guillen-Castellanos, J. Scott Parent, Ralph A. Whitney, Rui Resendes,