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8141369 
Journal Article 
Effects of Dual Curing System on Cosslinking Behavior and Properties of Polyolefin Elastomer Encapsulation Films 
Chen, L; Liu, J; Yu, Q 
2017 
0 
Gaofenzi Cailiao Kexue yu Gongcheng
ISSN: 1000-7555 
Chengdu University of Science and Technology 
33 
3 
89-94 
Chinese 
A dual curing system for polyolefin elastomer (POE) encapsulation films was made up of a high activity peroxide and a low activity peroxide. DSC and FT-IR were used to analyze decomposition behavior of peroxide system in POE films. Combined with measurements of crosslinking extent of cured films, the effects of the dual curing system on crosslinking behavior of POE and properties of cured films were investigated. It is found that, when peroxide is used solely, crosslinking extents in POE films follow this order: tert-butylperoxy 2-ethylhexyl carbonate (TBEC)/POE>tert-amylperoxy 2-ethylhexyl carbonate (TAEC)/POE>>1,1-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane (BPMC)/POE, and all peroxides are decomposed partially during casting process, leading to formation of microgels in uncured films. The crosslinking extent in the film cured with a dual curing system of TBEC and 2,5-dimethyl-2,5-di(t-butylperoxy)hexane (DBPH) is higher than that in the film cured with TBEC alone, when the mass ratio of TBEC/DBPH is higher. The light transmittance, tensile strength, peel strength and anti-aging property of the films cured with the dual curing system of TBEC and DBPH are all improved, and the formation of microgels in uncured films is suppressed with the dual curing system. However, when the mass ratio of TBEC/DBPH is less than 1.5/0.5, the crosslinking extent and other properties of the cured films drop. © 2017, Editorial Board of Polymer Materials Science & Engineering. All right reserved. 
Crosslinking behavior; Dual curing; Encapsulation film; Peroxide; Polyolefin elastomer