期刊
POLYMERS
卷 13, 期 20, 页码 -出版社
MDPI
DOI: 10.3390/polym13203479
关键词
Eucommia rubber; ZDMA; shape memory; composite
资金
- National Natural Science Foundation of China [51303092, 51573194]
- Major scientific and technological innovation projects in Shandong Province, China [2019JZZY020223]
- Natural Science foundation of Shandong province, China [ZR2019MEM016, ZR2019MEM028, ZR2020ME009]
Shape memory Eucommia rubber composites were processed with both carbon-carbon and ionic cross-linking networks, demonstrating excellent mechanical and shape memory properties under analytical techniques. DCP and ZDMA played crucial roles in enhancing the performance of the composites.
We processed a series of shape memory Eucommia rubber (ER) composites with both carbon-carbon and ionic cross-linking networks via a chemical cross-linking method. The influence of the carbon-carbon cross-linking and ion cross-linking degree of ER composites on curing, mechanical, thermal, and shape memory properties were studied by DSC, DMA, and other analytical techniques. Dicumyl peroxide (DCP) and zinc dimethacrylate (ZDMA) played a key role in preparing ER composites with a double cross-linking structure, where DCP initiated polymerization of ZDMA, and grafted ZDMA onto polymer molecular chains and cross-linked rubber molecular chains. Meanwhile, ZDMA combined with rubber macromolecules to build ionic cross-linking bonds in composites under the action of DCP and reinforced the ER composites. The result showed that the coexistence of these two cross-linking networks provide a sufficient restoring force for deformation of shape memory composites. The addition of ZDMA not only improved the mechanical properties of materials, but also significantly enhanced shape memory performance of composites. In particular, Eucommia rubber composites exhibited outstanding mechanical properties and shape memory performance when DCP content was 0.2 phr.
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