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SYNTHESIS OF natural rubber-g-MALEIC ANHYDRIDE AND ITS USE AS A COMPATIBILIZER IN natural rubber/short nylon fiber composite.

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Chinese Journal of Polymer Science 2013年第8期31卷 1127-1138页

作者：董智贤 Ming-xian Liu 贾德民 Yan-hao Zhou College of Materials Science and Engineering South China University of Technology School of Materials and Energy Guangdong University of Technology Guangzhou Higher Education Mega Center

natural rubber grafted maleic anhydride （NR-g-MAH） was synthesized by mixing maleic anhydride （MAH） and natural rubber （NR） in solid state in a torque rheometer using dicurnyl peroxide （DCP） as initiator. Then the self-prepared NR-g-MAH was used as a compatibilizer in the natural rubber/short nylon fiber composite.. Both the fimctionalization of NR with MAH and the reaction between the modified rubber and the nylon fiber were confirmed by Fourier transform infrared spectroscopy （FTIR）. composite. with different nylon short fiber loadings （0, 5, 10, 15 and 20 phr） were compounded on a two-roll mill, and the effects of the NR-g-MAH on the tensile and thermal properties, fiber-rubber interaction, as well as the morphology of the natural rubber/short nylon fiber composite. were investigated. At equal fiber loading, the NR-g-MAH compatibilized NR/short nylon fiber composite. showed improved tensile properties, especially the tensile modulus at 100% strain which was about 1.5 times that of the corresponding un-compatibilized ones. The equilibrium swelling tests proved that the incorporation of NR-g-MAH increased the interaction between the nylon fibers and the NR matrix. The crosslink density measured with NMR techniques showed that the NR-g-MAH compatiblized composite. had lower total crosslink density. The glass transition temperatures of the compatibilized composite. were about 1 K higher than that of the corresponding un-compabilized ones. Morphology analysis of the NR/short nylon fiber composite. confirmed NR-g-MAH improved interfacial bonding between the NR matrix and the nylon fibers. All these results signified that the NR-g-MAH could act as a good compatilizer of NR/short nylon fiber composite. and had a potential for wide use considering its easy to be prepared and compounded with the composite..

关键词： natural rubber Maleic anhydride Graft natural rubber/short nylon fiber composite.

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