Journal
POLYMER TESTING
Volume 81, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2019.106169
Keywords
Rubber blends; Graphene; Vulcanization kinetics
Funding
- National Natural Science Foundation of China [U1134005]
- Natural Science Foundation of Guangdong Province [U1134005]
- Key Technology Research Projects of Strategic Emerging Industries of Guangdong [2012A090100017]
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Rubber blends are widely used for combining the advantages of individual rubber component. However, to date, how to determine and distinguish the vulcanization kinetics for each single rubber phase in rubber blends during the co-vulcanization process are still a challenge. Herein, high resolution pyrolysis gas chromatography-mass spectrometry (PyGC-MS) was employed for the first time to investigate the vulcanization kinetics of natural rubber (NR) and styrene-butadiene rubber (SBR) in their blends filled with graphene. It is shown that the crosslinking rate of NR chains (k(NR)) was much lower than that of SBR chains (k(SBR)) in the unfilled blends and blends with untreated graphene. Interestingly, the gap between k(SBR) and k(NR) was narrowed effectively in the blends with vulcanization accelerator grafted graphene, showing a better co-vulcanization of NR and SBR. In addition, the vulcanization accelerator grafted graphene was uniformly dispersed in rubber matrix and endowed rubber blends with higher mechanical strength and thermal conductivity did the untreated graphene.
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