中国塑料2017，Vol.31Issue(12)：34-38,5.DOI:10.19491/j.issn.1001-9278.2017.12.006
新型茂金属高支化聚乙烯产品的结构及性能研究
Structure and Properties of a New Highly Branched Metallocene Polyethylene
葛腾杰 1李瑞 1王世华 1姜艳峰1
作者信息
- 1. 大庆化工研究中心,黑龙江大庆163714
- 折叠
摘要
Abstract
The branching composition distribution and melting-crystallization properties of very-low-density polyethylene PE-VLD with different chain lengths were investigated by means of 13C-NMR spectroscopy and differential scanning calorimetry.The polymerization characteristics of these PEVLD samples were analyzed on the basis of mean sequence lengths,relative monomer distribution and monomer reactivity ratios,and their crystallization characteristics including lamellar thickness,relative branching degree and crystallinity degree were investigated by SSA thermal classification method.The results indicated that,in the case of PE-VLD with a density of 0.912 g/cm3 and a melt flow rate of 1.0 g/10 min,the sample synthesized by using a butylethylene comonomer exhibited a lower content of copolymerized segment and a lower branching degree than that using a butylene comonomer.However,it had higher crystallinity degree and thicker crystalline lamellas.关键词
极低密度聚乙烯树脂/高支化结构/结晶性能Key words
very-low-density polyethylene/highly branched structure/crystallization behavior分类
化学化工引用本文复制引用
葛腾杰,李瑞,王世华,姜艳峰..新型茂金属高支化聚乙烯产品的结构及性能研究[J].中国塑料,2017,31(12):34-38,5.
