화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.14, No.6, 720-725, November, 2008
DOI10.1016/j.jiec.2008.06.002  Export Citation
Synthesis of conjugated spirocyclic polymers: Cyclopolymerization of 1,1-dipropargyl-1-silacycloalkanes by transition metal catalysts
In-Sook Lee, Young-Woo Kwak†, Hak-Dong Lee, and Yeong-Soon Gal1
  • Department of Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea
  • 1Polymer Chemistry Laboratory, College of Engineering, Kyungil University, Hayang 712-701, Kyungsangbuk-Do, Republic of Korea
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Cyclopolymerization of 1,1-dipropargyl-1-silacyclobutane and 1,1-dipropargyl-1-silacyclopentane was examined by various transition metal catalysts. WCl6 was found to be very effective for this cyclopolymerization to give high yields of polymers. The polymer structures were characterized to have the conjugated polymer backbone with silacycloalkane moieties. The resulting poly(1,1-dipropargyl-1-silacyclobutane) was insoluble in any organic solvents, whereas the poly(1,1-dipropargyl-1-silacyclopentane) was partially soluble. The conjugated spirocyclic polymers were mostly yellow or light-brown powders, depending on the catalyst systems used. The thermal and oxidative stabilities of the polymer were also studied and discussed.
Keywords:Cyclopolymerization;Catalysts;Conjugated spirocyclic polymer;Polyacetylenes;Silacycloalkanes
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