Maro Publications

Tie Molecules ©

From 01/05/2014 to xx/xx/xxxx

Notes

Patent Abstracts

Patent Titles

Maro Encyclopedia

Morphology

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

Patent Titles

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

Patent Abstracts

U.S. Patent 8,598,270 (December 3, 2013),  “Multi-Arm Star Ethylene Polymers and Process for Making,” Andy H. Tsou, Shuji Luo, and Johannes M. Soulages (ExxonMobil Research and Engineering Company, Annandale, New Jersey, USA).

In semi-crystalline polyolefins, crystallites form aggregates resulting in structures such as spherulites or fibrils. Long chain branches can tie crystals together improving stiffness and strength by becoming part of the crystals.  Long chains, however, make processing more difficult because of their viscosity.  One type of copolymer for enhancing toughness by means of tie molecules without compromising processability is a multi-arm, star copolymer.  Tsou, Luo, and Soulages developed star ethylene copolymer for connecting crystals. The core is an ethylene/maleic anhydride copolymer.  The arms are added by solid state grafting vinyl-terminated polyethylene chains to the core.  The molecular weight of the linear branches are 3,000 to 400,000 with a branching index close to 1.0.  Vinyl terminated polyethylene chains are produced by metal catalyzed coordination polymerization.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

Notes

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Interested!!
Bookmark this page to follow future developments!.
(RDC 7/16/2012)

 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

***********************************

Copyright 2013 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
**************************************