天津科技大学学报2026，Vol.41Issue(2)：60-66,7.DOI:10.13364/j.issn.1672-6510.20250037
桥联茂金属催化乙烯/1-辛烯共聚合
Bridged Metallocene Complexes for Ethylene/1-Octene Copolymerization
摘要
Abstract
In the current study,five bridged metallocene catalysts were designed and synthesized,and their structures were characterized by H nuclear magnetic resonance spectra(1H NMR)analysis.The effects of reaction temperature,reaction time,ethylene pressure,1-octene concentration,boron cocatalyst concentration,and TIBA concentration on the copolymer-ization of ethylene and 1-octene were investigated.The polymerization products were comprehensively analyzed and charac-terized using high-temperature gel permeation chromatography(GPC),differential scanning calorimetry(DSC),and nuclear magnetic resonance spectroscopy(NMR).The results indicated that the catalysts exhibited excellent thermal stability at ele-vated temperatures and superior copolymerization performance.Specifically,the catalytic activity reached 2.36×107 g/(mol·h)at 100℃,while the copolymer density was 0.875 2 g/cm3.With the increase in reaction temperature or the concen-tration of 1-octene,the catalytic activity first increased and then decreased.Meanwhile,the density of the polymerization products decreased.关键词
茂金属催化剂/聚烯烃弹性体/乙烯/1-辛烯/共聚合Key words
metallocene catalysts/polyolefin elastomers/ethylene/1-octene/copolymerization分类
化学化工引用本文复制引用
杨华蓥,牟祥升,李俊辰,邵若星,姜涛..桥联茂金属催化乙烯/1-辛烯共聚合[J].天津科技大学学报,2026,41(2):60-66,7.基金项目
国家自然科学基金项目(22071178) （22071178）
中国石油科技计划项目(2020B2512) （2020B2512）
