METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*

TIAN Jun; 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*
- Vol. 16, Issue 4, Pages: 370-376(1998)
- Affiliations：
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：20 December 1998
- Accepted：
Scan QR Code
TIAN Jun, WANG Baiquan, CHEN Shoushan, et al. METALLOCENE POLYETHYLENES WITH BROAD OR BIMODAL MOLECULAR WEIGHT DISTRIBUTION*[J]. 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

Views

Downloads

CSCD

Alert me when the article has been cited

Submit

Tools

Publicity Resources

Experimental Investigation of Graphene and TiO2 Reinforced Poly(vinyl alcohol)-based Fiber Metal Laminates

Preparation and Chiral Recognition Ability of Crystalline Cellulose Phenylcarbamate

From Molecular Defect to Macroscopic Performance: Manipulating Dichroism and Mechanics in Iodine-doped Poly(vinyl alcohol) via Ethylene Incorporation

Special Topic: Chirality in Polymers

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

Related Author

No data

Related Institution

No data

⁰