MISC

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
  • T Sato
  • ,
  • Y Arima
  • ,
  • M Seno
  • ,
  • T Hirano

53
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
DOI
https://doi.org/10.1002/pi.1515
CiNii Articles
http://ci.nii.ac.jp/naid/80016814661
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000222857200019&DestApp=WOS_CPL
ID情報
  • DOI : 10.1002/pi.1515
  • ISSN : 0959-8103
  • CiNii Articles ID : 80016814661
  • Web of Science ID : WOS:000222857200019

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