Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 43, Issue 2, Pages 429-437Publisher
WILEY
DOI: 10.1002/pola.20509
Keywords
atom transfer radical polymerization (ATRP); divinylbenzene; graft; copolymers; isotactic; poly(propylene) (PP); vinylbenzene groups
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This article discusses a facile and inexpensive reaction process for preparing polypropylene-based graft copolymers containing an isotactic polypropylene (i-PP) main chain and several functional polymer side chains. The chemistry involves an i-PP polymer precursor containing several pendant vinylbenzene groups, which is prepared through the Ziegler-Natta copolymerization of propylene and 1,4-divinylbenzene mediated by an isospecific MgCl2-supported TiCl4 catalyst. The selective monoenchainment of 1,4-divinylbenzene comonomers results in pendant vinylbenzene groups quantitatively transformed into benzyl halides by hydrochlorination. In the presence of CuCl/pentamethyldiethylenetriamine, the in situ formed, multifunctional, polymeric atom transfer radical polymerization initiators carry out graft-from polymerization through controlled radical polymerization. Some i-PP-based graft copolymers, including polypropylene g-methyl methacrylate) and polypropylene-g-styrene), have been prepared with controlled compositions. (C) 2004 Wiley Periodicals, Inc.
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