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Issue 36, 2020

Thermoreversible cross-linking of ethylene/propylene copolymers based on Diels–Alder chemistry: the cross-linking reaction kinetics

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Abstract

Designing reversibly cross-linked polymer materials is of great importance for repeated processing. In this work, a Diels–Alder (DA) reaction between furan and maleimide was utilized to achieve thermoreversible cross-linking of ethylene/propylene rubber (EPR) by first constructing EPR with furyl pendent groups and then adding bismaleimide molecules as a cross-linking agent. The kinetics of the cross-linking reaction was detected using the rheological test, and the apparent kinetic rate coefficient (kCL) and Arrhenius activation energy (Ea, CL) of the cross-linking reaction were determined. By adjusting the furyl content of EPR and the molecular structure of the bismaleimide, the influence of the furan/maleimide ratio as well as the bismaleimide structure on the Ea, CL value was investigated, which might provide support for the efficient realization of reversible cross-linking in polymers and the repeated processing of materials via DA chemistry.

Graphical abstract: Thermoreversible cross-linking of ethylene/propylene copolymers based on Diels–Alder chemistry: the cross-linking reaction kinetics

Supplementary files

Article information


Submitted
22 Jul 2020
Accepted
13 Aug 2020
First published
13 Aug 2020

Polym. Chem., 2020,11, 5851-5860
Article type
Paper

Thermoreversible cross-linking of ethylene/propylene copolymers based on Diels–Alder chemistry: the cross-linking reaction kinetics

S. Liu, X. Liu, Z. He, L. Liu and H. Niu, Polym. Chem., 2020, 11, 5851 DOI: 10.1039/D0PY01046D

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