METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*

TIAN Jun; 王佰全; WANG Baiquan; CHEN Shoushan; LIU Yu; HUANG Baotong

Your Location：

Home >

Browse articles >

METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*

Papers | Updated：2021-06-21

- METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*
- METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*
- 高分子科学（英文版） 1998年16卷第4期页码：370-376
- Affiliations：
- Author bio：
- Funds：
- DOI：
  中图分类号：
- 纸质出版：1998-12-20
- Accepted：
Scan QR Code
TIAN Jun, 王佰全, WANG Baiquan, 等. METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*[J]. 高分子科学（英文版）, 1998,16(4):370-376.

TIAN Jun, WANG Baiquan, CHEN Shoushan, et al. METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*[J]. 1998, 16(4): 370-376.
TIAN Jun, 王佰全, WANG Baiquan, 等. METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*[J]. 高分子科学（英文版）, 1998,16(4):370-376. DOI：

TIAN Jun, WANG Baiquan, CHEN Shoushan, et al. METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*[J]. 1998, 16(4): 370-376. DOI：

摘要

Seven new binuclear titanocenes with different linking bridges

unsubsti-tuted or substituted on the Cp rings

were synthesized and tested for their effect on ethylenepolymerization in the presence of MAO. The polyethylenes thus obtained had broad MWDor even bimodal GPC curves

as compared with that from two reference mononuclear ti-tanocenes. This is explained by the difference in degree of steric hindrance around the activecenter sites imposed by the bulky substituted ligands assuming different configurations in the rotation of the catalyst molecules.Lower polymerization temperatures alleviate the effect of these configuration differnces

as reflected in change in MW and Mw/Mn.This effect is not caused by decomposition or disproportionation of the binuclear titanocenes as evidenced by the stability of the catalyst.

Abstract

Seven new binuclear titanocenes with different linking bridges

unsubsti-tuted or substituted on the Cp rings

were synthesized and tested for their effect on ethylenepolymerization in the presence of MAO. The polyethylenes thus obtained had broad MWDor even bimodal GPC curves

as reflected in change in MW and Mw/Mn.This effect is not caused by decomposition or disproportionation of the binuclear titanocenes as evidenced by the stability of the catalyst.

关键词

Keywords

references

浏览量

Downloads

CSCD

文章被引用时，请邮件提醒。

Submit

工具集

关联资源

Tunable Circularly Polarized Luminescence of Helical Poly(phenylacetylene)s via Side-chain-to-Backbone Förster Resonance Energy Transfer

Multiple-Responsive Chiral Hydrogels from Helical Dendronized Poly(phenylacetylene)s

Improvements of Hydrophobicity and Toughness of Epoxy Coatings Modified with Hydroxyl-terminated Fluororubber

Durable Anti-fogging and Abrasion-resistant Coatings Based on Polyoxometalates-Hydrophilic Resin Composites with Enhanced Cohesion and Adhesion

End-group and Side-chain Dual-engineering of Selenium-fused Acceptors for 20.08% Efficiency Polymer Solar Cells with Low Energy Loss