文献类型：期刊文献

英文题名：CRYSTAF analysis of polyethylene synthesized with phillips catalyst

作者：Xia, Wei[1,2]; Taniike, Toshiaki[1]; Terano, Minoru[1]; Fujitani, Tadahiro[2]; Liu, Boping[3]; Soares, Jo?o B. P.[4]

机构：[1] School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan; [2] Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology [AIST], Tsukuba West 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan; [3] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Mei Long Road 130, Shanghai, 200237, China; [4] Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada

年份：2009

卷号：285

期号：1

起止页码：74

外文期刊名：Macromolecular Symposia

收录：EI(收录号：20100112609729)

语种：英文

外文关键词：Catalysts - Ethylene - Chains - Polyethylenes

摘要：Crystallization analysis fractionation (CRYSTAF) was used for the first time to investigate the solution crystallization behavior of ethylene homopolymers and copolymers made with Phillips CrOx/SiO2 catalyst. Interestingly, the crystallization peak temperatures (Tp) of copolymers of ethylene and cyclopentene increased with increasing cyclopentene molar fraction in the copolymer. Comparing two factors (short chain branches (SCBs) and cyclopentene incorporation), decreasing SCB frequency is proposed as the dominant factor to explain the increase of crystallization peak temperatures with increasing cyclopentene incorporation. In addition, SCB frequency and molecular weight might be the two significant factors determining the crystallization temperature of polyethylene made with Phillips CrO x/SiO2 catalyst with different cocatalysts (triethylaluminum and diethylaluminum ethoxide). ? 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.