Cross-linking of rubber in the presence of multi-functional cross-linking aids via thermoreversible Diels-Alder chemistry

L.M. Polgar, G. Fortunato, R. Araya-Hermosilla, M. van Duin, A. Pucci, F. Picchioni

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

Furan-functionalized polyketone (PK-FU) was added to a furan-functionalized ethylene-propylene rubber (EPM-FU). The mixture was subsequently cross-linked with a bismaleimide through Diels-Alder chemistry in order to improve the mechanical properties of the rubber. Infrared spectroscopy showed the reversible interaction between both polymers and the bismaleimide cross-linker. Likewise, mechanical measurements indicated the re-workability of the mixtures with no evident differences in storage modulus and mechanical properties after several heating cycles. The cross-link density and mechanical properties, such as hardness, tensile properties and compression set, could be modulated by changing the degree of furan functionalization of PK-FU and the PK-FU loading in the blends. It is concluded that PK-FU has some characteristics of an inert filler, but mainly acts as a multi-functional cross-linking aid, enabling larger amounts of bismaleimide to cross-link EPM-FU.

Original languageEnglish
Pages (from-to)208-219
Number of pages12
JournalEuropean Polymer Journal
Volume82
DOIs
Publication statusPublished - 1 Sep 2016
Externally publishedYes

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