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Relationship between the cell structure and mechanical properties of chemically crosslinked polyethylene foams

journal contribution
posted on 2012-05-15, 00:00 authored by M Davari, M K Razavi Aghjeh, Seyed Mohsen Seraji
The main objective of this work was to study the effect of the controlling parameters on the morphology and mechanical properties of the peroxide crosslinked low‐density polyethylene foams. The relationship between the morphology and mechanical properties was also considered. Using different Dicumyl peroxide (DCP) and azodicrbonamide (ADCA) concentrations, various foams with different cell structures were prepared. Gel content and density of the foams were measured according to the standard methods. The morphology was examined using SEM technique. The mechanical properties of the foams were evaluated by means of compression and creep recovery tests. The results showed that the gel content and the density are mainly controlled by DCP and ADCA concentration, respectively. The results also showed that the cell size distribution is mainly controlled by DCP concentration. Increasing of DCP increased the gel content and decreased the cell size and cell size distribution. Foam density was mainly controlled by ADCA concentration, whereas the morphology was less affected with ADCA concentration. The foams with small cell size and narrow cell size distribution showed higher mechanical strength and lower plastic strain.

History

Journal

Journal of applied polymer science

Volume

124

Issue

4

Pagination

2789 - 2797

Publisher

Wiley

Location

Chichester, Eng.

ISSN

0021-8995

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2011, Wiley Periodicals, Inc.

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