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Preparation and Properties of Interpenetrating Polymer Network Films from Prevulcanized Natural Rubber Latex/Chitosan Blends

文献类型： 外文期刊

作者： Lu, Guang 1 ; Yu, Heping 1 ; Zeng, Zongqiang 1 ; Luo, Yongyue 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Agr Minist Key Lab Trop Crops Proc, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China

关键词： Natural rubber latex;prevulcanization;chitosan;blend;interpenetrating polymer network;films;mechanical properties;swelling behavior

期刊名称：ADVANCES IN CHEMICAL ENGINEERING, PTS 1-3

ISSN： 1022-6680

年卷期： 2012 年 396-398 卷

页码：

收录情况： SCI

摘要： The acidfied sulfur-prevulcanized natural rubber (NR) latex was mixed with 1 similar to 20 parts per hundred rubber (phr) of a 2wt% solution of chitosan (CS) in 1wt% acetic acid, then cast to preapare a series of NR/CS semi-interpenetrating polymer network (semi-IPN) films; the NR/CS semi-IPN films were further treated with 0.5wt% glutaraldehyde (GA) solution for respectively 1, 3 and 6h to obtain NR/CS IPN films. The mechanical properties and swelling behavours in various media of water, toluene and reference ohs of IRM901 and IRM 903 of these films were studied and compared with those pure sulfur-prevulcanized natural rubber latex (SNRL) film. Results showed that, NR/CS IPN films with better mechanical properties could be obained by treating the 24h-leached NR/CS semi-IPN films than by treating directly the unleached ones with 0.5wt% GA solution; the tear strength, 300% modulus, Shore A hardness, hydrophilicity and resistance to non-polar solvents and oil of the SNRL films increased with the incorporation of CS, while the NR/CS IPN films exhibited better than the NR/CS semi-IPN films, especially in tear strength enhancement; the tensile strength and elongation at break of NR/CS semi-IPN and IPN films gradually decreased with the increase in CS content. However, most of the elasticity of pure NR vulcanizate could be reserved, when the CS content was not greater than 15 phr.

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