Premixtures of low molecular weight polypropylene carbonate (PPC),maleic anhydride(MA) and carbon black N550 were prepared.The effects of the amount of the PPC premix and alkaline silica on the vulcanization characteristics,mechanical properties,aging resistance,medium resistance and compression performance of the NBR/HNBR oil-resistant rubber tube were studied.it demonstrated that the PPC premix had the effect of hardening and strengthening.It can improve the hardness,tensile strength,tearing property and aging resistance of the rubber,reducing the volume oil absorption rate.When the dosage of PPC premix was 22phr,the tensile strength,hardness and tear strength of the rubber were 19.10MPa,78 and 34.06N/mm respectively.The change rate of tensile strength and elongation were 7.1% and ～14.5% respectively after aging,the change rate of tensile strength,elongation and volume were 5.9%,-7.8%,-0.13% after medium resistan.The comprehensive performances of the rubber were obviously better than those of N550 filled rubber.
Zhao Guiying, Wang Zhongguang, Weng Guowen, Zhang Xiaoping, Xu Yunhui
. Study on preparation and performance of NBR/HNBR oil-resistant rubber hose inner compound[J]. New Chemical Materials, 2020
, 48(12)
: 261
-264
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.12.060
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