標題: Copolymerization of norbornene with ethylene: a high-resolution liquid NMR, DSC and solid state NMR study
作者: Huang, WJ
Chang, FC
Chu, PPJ
應用化學系
Department of Applied Chemistry
關鍵字: cycle olefin copolymer (COC);monomer reactivity ratio;solid state NMR;spin-lattice relaxation time (T-1p(C))
公開日期: 1-Mar-2000
摘要: In this paper, we report the monomer reactivity on the copolymerization of norbornene and ethylene. The reactivity ratios for ethylene (M-1) and norbornene (M-2) are 18.5 and 0.035, respectively. Different copolymerization conditions can produce COC with different microstructures. A C-13 NMR shift assignment in pentad sequences in copolymers has been obtained. More isolated polynorbornene or a micro-block length can be obtained using a low Zr/Al catalyst/co-catalyst ratio and at a lower NB/ethylene feed ratio. The T-1p(C) decay curve shows two component decays in all resonance peaks. These two component decays come from different norbornene microstructures, while the block and alternative have similar T-1p(C) values.
URI: http://hdl.handle.net/11536/30662
ISSN: 1022-9760
期刊: JOURNAL OF POLYMER RESEARCH-TAIWAN
Volume: 7
Issue: 1
起始頁: 51
結束頁: 56
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