✦ LIBER ✦

High pressure radical polymerization of ethylene with nitrogen

✍ Scribed by D. Constantin; J.P. Machon

Book ID: 103071886
Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 342 KB
Volume: 14
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(78)90017-4

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✦ Synopsis

The radical polymerization of ethylene has been performed in the presence of nitrogen. The structural characteristics of polymers prepared with 0-25 weight % of nitrogen at 1,200 atm were determined by usual solution methods (viscometry, GPC) and by infrared spectroscopy. The experimental results show that, when the demixing in two phases appears, long chain branching decreases and unsaturation increases.

R6sum6--La polym6risation radicalaire de 1'6thyl6ne est conduite en pr6sence d'azote. Les carac-t6ristiques de structure des 6chantillons de polym6re pr6par6s avec des teneurs d'azote comprises entre 0 et 25% en poids par rapport ~ l'6thyl6ne sont examin6es par les techniques usuelles d'analyse en solution (viscosim6trie, chromatographie par perm6ation de gel) et par spectroscopie infra-rouge. Les r6sultats obtenus montrent que le branchement long des macromoi6cules form6es diminue et que le nombre des insaturations augmente lorsqu'il y a demixtion de phases.

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