聚烯烃产品中低聚物的分析

化工进展

聚烯烃产品中低聚物的分析

张欣，孟伟娟，王超，吕占霞，张月红，王健

中国石油化工股份有限公司北京燕山分公司研究院；北京大学化学与分子工程学院

出版日期:2009-09-05 发布日期:2009-09-05

Analysis of oligomers from polyolefins

ZHANG Xin，MENG Weijuan，WANG Chao，LU Zhanxia，ZHANG Yuehong，WANG Jian

Research Institute of Beijing Yanshan Petrochemical Co. Ltd.，SINOPEC；College of Chemistry and Molecular Engineering，Peking University

Online:2009-09-05 Published:2009-09-05

摘要/Abstract

摘要： 通过对CX（淤浆均聚 + 淤浆共聚 + 离心脱除低聚物）工艺产品中离心机脱除低聚物前后聚合物的分子量分布的分析对比，得出离心机可以脱除低聚物，最终产品中低聚物含量降低；通过力学和热稳定性的研究，证明了产品经离心机脱除低聚物后力学及热性能均有所提高；利用核磁分析了烯烃淤浆聚合工艺难以生产高共聚单体含量的聚乙烯牌号的原因。

Abstract: The molecular weight distribution of the polyolefins was analyzed before and after the oligomers removed from the crude product by centrifugation. These polymers were produced by CX process consisting of slurry homo-polymerization, slurry copolymerization and centrifugation，or by gas process including slurry homo-polymerization and gas copolymerization. The effect of the oligomers on the dynamic and thermal properties of the product was studied. The results showed that the oligomers within the product was partially removed by centrifugation. The dynamic and thermal properties of the product were improved, comparison with the crude product. The content of comonomer incorporation within the polyolefin chain was determined by 13C NMR, the result revealed that the oligomers had higher content of comonomer incorporation than the polymer with high molecular weight. A new polymerization process, consisting of slurry homo-polymerization, centrifugation to remove oligomer partially and gas copolymerization, might be proposed.

张欣，孟伟娟，王超，吕占霞，张月红，王健. 聚烯烃产品中低聚物的分析 [J]. 化工进展.

ZHANG Xin，MENG Weijuan，WANG Chao，LU Zhanxia，ZHANG Yuehong，WANG Jian. Analysis of oligomers from polyolefins[J]. Chemical Industry and Engineering Progree.