CURING KINETICS AND PROPERTIES OF NATURAL RUBBER COAGULATED USING MICROWAVE RADIATION

文献类型： 外文期刊

第一作者： Liao, Lu-Sheng

作者： Liao, Lu-Sheng;Liao, Jian-He;Li, Yi-Min;Chen, Yong-Ping;Zhao, Yan-Fang;He, Can-Zhong;He, Can-Zhong

作者机构：

期刊名称：RUBBER CHEMISTRY AND TECHNOLOGY （ 影响因子：1.868； 五年影响因子：2.117 ）

ISSN： 0035-9475

年卷期： 2014 年 87 卷 1 期

页码：

收录情况： SCI

摘要： Microwave energy at a frequency of 2.45 GHz was used to coagulate natural rubber (NR) latex. Testing on technological properties indicates that microwave coagulation is a useful means of obtaining standard NR, meeting the requirements for technically specified rubber (TSR) 5, and Fourier transform infrared (FTIR) analysis indicates that NR coagulated using microwave radiation (NR-m) has higher levels of nitrogeneous compounds than NR coagulated using acid (NR-a). Curing behavior was characterized using a rheometer. Research on kinetics shows that the rate constants of the three periods of NR-m vulcanization (the induction period, the fast-cross-linking period, and the end stage of curing period) are higher than those of NR-a. The fast-cross-linking period of NR-m vulcanization can be divided into two stages (I and II) with two rate constants, K-2 and K-3, whereas for NR-a there is only one rate constant, K-2. With a change in curing temperature, the reaction orders for stages land II vary in the range 0.8-1.0, and K-2 and K-3 increase linearly with the increase in temperature, giving the activation energies E-2= 89.5 kJ/mol and E-3 = 115.3 kJ/mol.

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