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Effects of different drying methods on the microstructure and thermal oxidative aging resistance of natural rubber

文献类型： 外文期刊

作者： Mei, Chen 1 ; Yong-Zhou, Wang 1 ; Guang, Lu 1 ; Xiao-Ping, Wang 2 ;

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

2.S China Univ Technol, Dept Polymer Mat Sci & Engn, Inst Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China

关键词： natural rubber;drying;microwave;hot air;SEM;property

期刊名称：JOURNAL OF APPLIED POLYMER SCIENCE （ 影响因子：3.125； 五年影响因子：2.754 ）

ISSN： 0021-8995

年卷期： 2012 年 126 卷 6 期

页码：

收录情况： SCI

摘要： In this work, the wet natural rubber granules were dried by hot air and by microwave at 115 degrees C, respectively; the morphological structures of dried natural rubber granules were studied by using a scanning electronic microscope, whereas the thermal oxidative properties of dried natural rubber granules were investigated by comparison of variation in properties before and after aging, and the changes in the thermal oxidative decompose temperatures. The results showed that it needed 13.47 min for microwave drying and 210.00 min for hot air drying to reduce the moisture content of wet natural rubber to the required value. The granules of natural rubber dried by microwave were of rough surfaces and the cutting traces produced during the processing of wet natural rubber remained on the natural rubber surface; whereas, the natural rubber granules dried by hot air were of smooth surfaces, and the cutting traces produced during the processing of wet granules disappeared. The thermal oxidative resistance of vulcanized natural rubber dried by microwave improved significantly. The initial plasticity (P0), plasticity retention index, and thermo-oxidative decomposition temperature of natural rubber dried by microwave were higher than those of natural rubber dried by hot air. (c) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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