NDLI: New insights in the peroxide crosslinking mechanism of polyethylene

Content Provider	IEEE Xplore Digital Library
Author	Smedberg, A. Gustafsson, B. Hjertberg, T.
Copyright Year	2000
Description	Author affiliation: Borealis AB, Stenungsund, Sweden (Smedberg, A.)
Abstract	In general the peroxide crosslinking mechanism of polyethylene is believed to be quite simple. However, different structural parameters may have a great influence. In this work the effect of pendant vinyl groups and long chain branching are discussed. The network formed is denser than what can be expected which is explained by the presence of trapped entanglements, i.e. physical crosslinking points. It turned out that the trapped entanglements constitute the major part of all the crosslinking points formed, about 60%. A higher 'quality' network is formed in the vinyl containing material due to the extra number of crosslinking points generated by the reaction of the vinyl groups. That network gives also a smaller deviation from a linear response when tested with different loads as the physical crosslinking points present are more permanent, i.e. there is less chain slippage under load. In contrast, an increased number of long chain branches gives more intramolecular crosslinking points, resulting in a less efficient network.
Starting Page	243
Ending Page	246
File Size	270899
Page Count	4
File Format	PDF
ISBN	0780354591
DOI	10.1109/ICPADM.2000.875677
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-06-21
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polyethylene Testing Temperature distribution Polymer films Time measurement Hydrogen Atomic measurements Polymer gels Pressure measurement Rubber
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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