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橡塑技术与装备 CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT
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Modification of low molecular weight PPC and its application
in rubber green research
Wang Zhongguang *, Zhao Guiying, Yang Zhao, Xu Yunhui, Kong Yuan
(Xuzhou College of Industrial Technology, Xuzhou 221140, Jiangsu, China)
Abstract: Low molecular weight polypropylene carbonate (PPC), maleic anhydride (MA) and boehmite
were prepared as premixes. The effects of the amount of PPC premix and silica on the processing properties,
mechanics, aging resistance, medium resistance and compression properties of NBR/AEM oil-resistant
sealants were studied. The results show that the PPC premix has a plasticizing effect, which can shorten the
vulcanization time, improve the fluidity of the rubber compound, and facilitate processing and molding.
PPC premix can also improve the tensile strength, elongation, aging resistance and medium resistance of
the rubber compound, and reduce the volume oil absorption rate and compression set. When the amount
of PPC premix is 21 parts and the amount of silica is 15 parts, the comprehensive performance of the rubber
compound is the best, and it is obviously better than that of the silica filler. The use of low molecular weight
PPC to replace ester plasticizers can provide a useful reference for the research of green rubber.
Key words: polypropylene carbonate; premix; boehmite; ethylene acrylate rubber; properties
(R-03)
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