Effect of Grafting Treatment on Properties of Aramid Fiber/Carbon Black/ Styrene-Butadiene Rubber Composites

LI Yang, XIAO Zhen, SHI Cai-wen, PAN Xiao-li, WANG Zi-yi

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (03) : 67-71. DOI: 10.15925/j.cnki.issn1005-3360.2024.03.013
Processing and Application

Effect of Grafting Treatment on Properties of Aramid Fiber/Carbon Black/ Styrene-Butadiene Rubber Composites

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Abstract

In this paper, the aramid fiber was modified with polyamic acid (PAA) and glycidyl polyhedral sesquioxane (POSS) by supercritical CO2 assisted solution impregnation method, and then aramid fiber/carbon black/styrene-butadiene rubber composites (AF/CB/SBR=2/50/100) were prepared by modified aramid fiber. The effects of modified aramid fibers on the processing performance of composites were tested and the effects of two surface grafting agents on the performance of AF/CB/SBR composites were investigated. The results showed that the crosslinking density of the composites increased significantly after the modification of POSS and PAA with supercritical CO2, which delayed the vulcanization process and increased the positive vulcanization time. The tensile strength and 100% constant elongation of the composites modified by supercritical CO2-assisted POSS increased by 10.77% and 19.58%, respectively, while the tensile strength and 100% constant elongation of the composites modified by supercritical CO2-assisted PAA increased by 15.13% and 25.77%, respectively. Correspondingly, after the modification of POSS and PAA assisted by supercritical CO2, the interface slip energy values were 5.76 and 6.94, increasing by 17.6% and 41.6%, respectively. In comparison, the aramid fiber modified by macromolecule PAA grafting is more favorable to the improvement of the comprehensive properties of rubber composites.

Key words

Aramid fiber / Graft treatment / Supercritical CO2 / Styrene butadiene rubber / Interfacial adhension

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LI Yang , XIAO Zhen , SHI Cai-wen , et al . Effect of Grafting Treatment on Properties of Aramid Fiber/Carbon Black/ Styrene-Butadiene Rubber Composites. Plastics Science and Technology. 2024, 52(03): 67-71 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.03.013

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