STRUCTURE AND CHARACTERIZATION OF POLY(1-BUTENE) FROM POLYMERIZATION WITH METALLOCENCE CATALYST

HUANG Qigu; ZHU Fangming; WU Qing; LIN Shangan

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STRUCTURE AND CHARACTERIZATION OF POLY(1-BUTENE) FROM POLYMERIZATION WITH METALLOCENCE CATALYST

Research Article | 更新时间：2021-03-19

- STRUCTURE AND CHARACTERIZATION OF POLY(1-BUTENE) FROM POLYMERIZATION WITH METALLOCENCE CATALYST
- Acta Polymerica Sinica Issue 1, Pages: 48-51(2001)
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- Published：20 February 2001，
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HUANG Qigu, ZHU Fangming, WU Qing, LIN Shangan. STRUCTURE AND CHARACTERIZATION OF POLY(1-BUTENE) FROM POLYMERIZATION WITH METALLOCENCE CATALYST. [J]. Acta Polymerica Sinica (1):48-51(2001)
DOI：

HUANG Qigu, ZHU Fangming, WU Qing, LIN Shangan. STRUCTURE AND CHARACTERIZATION OF POLY(1-BUTENE) FROM POLYMERIZATION WITH METALLOCENCE CATALYST. [J]. Acta Polymerica Sinica (1):48-51(2001) DOI：

摘要

以η5-五甲基茂基三苄氧基钛(Cp*Ti(OBz)3 和改性甲基铝氧烷 (mMAO)为催化剂

合成立体嵌段聚1-丁烯

分子量高

分子量分布窄(Mw/Mn=1.1～1.2).聚合产物经沸乙醚、沸庚烷连续抽提分离

聚合物在两种溶剂中都能部分溶解 .各级份经13C-NMR

WAXD

DSC和GPC等手段分析

结果表明乙醚可溶级份是无规聚1-丁烯

庚烷可溶级份是立体嵌段聚1-丁烯

庚烷不溶级份是等规聚1-丁烯 .聚合温度较低 (0℃和30℃ )时

聚合物有结晶性

结晶度达30%以上

DSC分析有两个吸热峰;聚合温度较高(40℃)时

聚合物无结晶尖锐X射线衍射峰

也无熔融吸热峰.

Abstract

A stereo block poly(1-butene) was synthesized with η5-pentamethylcyclopentadienyltribenzyl-oxidetitanium(Cp*Ti(OBz)3) and modified methylaluminoxane(MAO) as catalyst.The original polymer was extracted successively by boiling ether and heptane

and each fraction was characterized by 13C-NMR

WAXD and DSC. It was found that ether soluble fraction was atactic poly(1 butene)

heptane solube fraction was stereo block poly(1-butene)

and heptane insoluble fraction was isotactic one. The isotacticity

glass transition temperature and crystallinity of the polymers soluble in boiling heptane were increased with decreasing polymerization temperature.At lower polymerization temperature (30℃ and 0℃)

the polymers with the degree of crystallinity over 30% had two melting peake which were 43℃/55℃ and 85℃/88℃

respectively.But at higher temperature (40℃) noncrystalline polymer obtained from heptane-solube fraction was characterized by WAXD and DSC.The relationship between the propagation mechanism and the microstructure of the prepared products was studied by 13C-NMR. It was indicated that the 1

2-insertion was easier than 2

1-insertion.

关键词

聚1-丁烯微观结构性能表征

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Centre for Polymers from Renewable Resources, South China University of Technology

CSIRO, Materials Science and Engineering

College of Food Science, South China Agricultural University

扬州大学化学化工学院

扬州大学测试中心

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