2004年8月
Formation of a soluble hyperbranched polymer via initiator-fragment incorporation radical copolymerization of divinyl adipate and isobutyl vinyl ether
POLYMER INTERNATIONAL
- ,
- ,
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- 巻
- 53
- 号
- 8
- 開始ページ
- 1138
- 終了ページ
- 1144
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1002/pi.1515
- 出版者・発行元
- JOHN WILEY & SONS LTD
The copolymerization of divinyl adipate (DVA) with isobutyl vinyl ether (IBVE) was conducted at 70 and 80 degreesC in benzene using azobisisobutyronitrile (AIBN), at a concentration as high as 0.50 mol l(-1) as the initiator, where the concentrations of DVA. and IBVE were 0.40 and 0.60 mol l(-1), respectively. The copolymerization proceeded homogeneously, without any gelation, to yield soluble copolymers in spite of the high molar ratio of DVA as an excellent cross-linker for IBVE. The copolymer yield increased with time, and the number-average molecular weight (M-n = 0.9-2.4 x 10(4) g mol(-1)) from gel permeation chromatography (GPC) and molecular weight distribution (M-w/M-n = 1.5-7.6) of the resulting copolymer increased with copolymer yield. The cyanopropyl group, as a fragment of AIBN, was incorporated as a main constituent in the copolymer, the fraction of which increased from ca 10 to ca 20 % with copolymer yield, hence indicating that the copolymerization is an initiator-fragment incorporation radical polymerization. The copolymers also contained IBVE units (10-30 %) and DVA units with intact double bond (8-36 %) and without double bond (45 %). The intrinsic viscosity of the copolymer was very low (0.1 dl g(-1)) at 30 degreesC in tetrahydrofuran. The results from GPC-multi-angle laser light scattering (MALLS), transmission electron microscopy (TEM) and MALLS revealed that individual copolymer molecules were formed as hyperbranched nanoparticles. (C) 2004 Society of Chemical Industry.
- リンク情報
- ID情報
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- DOI : 10.1002/pi.1515
- ISSN : 0959-8103
- CiNii Articles ID : 80016814661
- Web of Science ID : WOS:000222857200019