新型茂金属聚烯烃弹性体Vistamaxx的溶液13C NMR 研究

摘要/Abstract

摘要：

Vistamaxx特种弹性体是一种新型的茂金属催化丙烯-乙烯共聚物，通过对其在溶液中¹³C NMR谱的归属和计算得到3种不同牌号的Vistamaxx弹性体的共聚物组成、单体和序列分布、亚甲基数均序列链长及分布等信息，并分别采用Bernoullian和一级Markovian统计模型对共聚物的三单元组序列分布进行处理，依据组成分布函数条件概率公式得到乙烯单元和丙烯单元的组成分布曲线. 

关键词: ¹³C NMR, 单体和序列分布, 亚甲基数均序列链长, Bernoullian统计模型, 质量分布函数, Vistamaxx特种弹性体

Abstract:

The composition and structure of three new polyolefin specialty elastomers, which were propylene-ethylene copolymers, were studied by ¹³C NMR. It was found that propylene and ethylene underwent atactic polymerization in the elastomers and the weight percentage of ethylene monomer was lower than 20 wt%. The monomer and sequence distributions and methylene number average sequence length were quantitatively determined. The observed triad distribution agreed with the results predicted with Bernoullian statistical model. The average chain segment length and distribution were calculated according to Bernoullian statistical model and copolymer compositions.

Key words: ¹³C NMR, monomer and sequence distribution, methylene number average sequence length, Bernoullian statistical model, weight distribution function, Vistamaxx specialty elastomer

中图分类号:

O482.53

赵辉鹏. 新型茂金属聚烯烃弹性体Vistamaxx的溶液¹³C NMR 研究[J]. 波谱学杂志, 2010, 27(2): 194-205.

ZHAO Hui-Peng. A ¹³C NMR Study of New Metallocene Polyolefin Vistamaxx Elastomer[J]. Chinese Journal of Magnetic Resonance, 2010, 27(2): 194-205.

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新型茂金属聚烯烃弹性体Vistamaxx的溶液¹³C NMR 研究

A ¹³C NMR Study of New Metallocene Polyolefin Vistamaxx Elastomer

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