复合絮凝剂制备低生热天然橡胶的研究
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摘要
采用逆絮凝工艺,絮凝剂选用复合絮凝剂(氯化钙/氯化钠并用)制备天然橡胶(NR),研究氯化钠用量对NR胶料性能的影响,并与参比样(烟胶片和云标胶)进行对比。结果表明:当复合絮凝剂氯化钙/氯化钠体积比为1∶1时,絮胶效果良好,当氯化钠质量分数为0.03时,NR胶料的转矩差较大,硫化胶的物理性能较优,损耗因子较小,滚动阻力和生热最低,灰分含量较小。
Using calcium chloride/sodium chloride as the composite flocculant,the NR was prepared by reversed coagulation process,and the effect of the addition level of sodium chloride on the properties of NR was investigated,and compared with those of reference sample(RSS and SCR from Yunnan).The results showed that,when the volume ratio of calcium chloride/sodium chloride was 1∶1,the flocculation effect was better.When the mass fraction of sodium chloride was 0.03,the NR compound possessed larger torque increase,preferable physical properties,smaller tanδ,and lower rolling resistance,smaller heat build-up and lower ash content.
Using calcium chloride/sodium chloride as the composite flocculant,the NR was prepared by reversed coagulation process,and the effect of the addition level of sodium chloride on the properties of NR was investigated,and compared with those of reference sample(RSS and SCR from Yunnan).The results showed that,when the volume ratio of calcium chloride/sodium chloride was 1∶1,the flocculation effect was better.When the mass fraction of sodium chloride was 0.03,the NR compound possessed larger torque increase,preferable physical properties,smaller tanδ,and lower rolling resistance,smaller heat build-up and lower ash content.
引文
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[10]Taikum O,Luginsland H D.Silane-Rubber Coupling in Sulfur,Peroxide and Metal Oxide Curing Systems[J].Rubber World,2004,230(5):30-39.
[2]何仕新,戚盛杰,程永祜,等.用凝聚法制备粉末丁腈橡胶[J].合成橡胶工业,1997,20(6):331-334.
[3]张安强,王炼石,林雅铃,等.酸化絮凝包覆法制备硫调节型粉末氯丁橡胶[J].弹性体,2004,14(5):6-10.
[4]张安强,王炼石.逆凝聚包覆法制备硫黄调节型粉末氯丁橡胶粒径分布[J].橡胶工业,2004,51(11):645-650.
[5]Zhang A Q,Wang L S,Lin Y L.Preparation of Sulfur-Modified Powdered Polychloroprene Rubber by Inverse Coagulation[J].Journal of Applied Polymer Science,2005,98(5):2109-2115.
[6]John C K.Studies on Some Gelling Properties of Hevea Latex Serum[J].Journal of the Rubber Research Institute of Malaya,1973,23(4):317-322.
[7]John C K.Biological Coagulation of Hevea Latex Using Waste Carbohydrate Substrates[J].Journal of the Rubber Research Institute of Malaya,1966,19(5):286-289.
[8]朱艳彬,马放,杨基先,等.絮凝剂复配与复合型絮凝剂研究[J].哈尔滨工业大学学报,2010,42(8):1254-1258.
[9]何忠建,方海旋,符新.表面活性剂和氯化钙作凝固剂凝固天然胶乳的研究[J].化学工程师,2008,22(3):62-64.
[10]Taikum O,Luginsland H D.Silane-Rubber Coupling in Sulfur,Peroxide and Metal Oxide Curing Systems[J].Rubber World,2004,230(5):30-39.