加工工艺对天然橡胶分子结构和性能的影响  

Effect of Processing Techniques on Molecular Structure and Properties of NR

作　　者：崔纪元 王洪振[1] 李法德 渠庆龙 丁树强 唐海龙 辛振祥[1,2] CUI Jiyuan;WANG Hongzhen;LI Fade;QU Qinglong;DING Shuqiang;TANG Hailong;XIN Zhenxiang(Qingdao University of Science and Technology,Qingdao 266042,China;Zhongce Rubber(Tianjin)Tire Co.,Ltd,Tianjin 300452,China;Hainan Natural Rubber Industry Group Co.,Ltd,Haikou 570105,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042 [2]中策橡胶(天津)有限公司,天津300452 [3]海南天然橡胶产业集团股份有限公司,海南海口570105

出　　处：《橡胶工业》2024年第8期610-615,共6页China Rubber Industry

基　　金：国家重点研发计划项目(2022YFD2301204);山东省自然科学基金资助项目(ZR2020MB041)。

摘　　要：研究加工工艺对天然橡胶(NR)分子结构和性能的影响。采用2种新的加工工艺制备NR,即采用酶辅助微生物凝固+造粒+低温干燥工艺制备NR(HJ)和采用酶辅助微生物凝固+造粒+双螺杆机挤出干燥工艺制备NR(JC)。试验表明,与传统加工工艺NR(SCRWF和SCR20)相比,HJ的杂质质量分数和灰分质量分数最小,氮质量分数最大,HJ胶料的塑性保持率最大,HJ硫化胶的炭黑分散性最佳,拉伸强度最大,耐热空气老化性能最好,HJ的橡胶分子结构和性能优于SCRWF和SCR20。The effect of processing techniques on the molecular structure and properties of natural rubber(NR)was studied.Two new processing techniques were used to prepare NR,namely,enzyme-assisted microbial coagulation+granulation+low temperature drying for NR(HJ)and enzyme-assisted microbial coagulation+granulation+twin screw extrusion drying for NR(JC).The test results showed that,compared with NR based on conventional processing(SCRWF and SCR20),the impurity mass fraction and ash mass fraction of HJ were the smallest,while the nitrogen mass fraction was the largest.The plasticity retention index of HJ compounds was the largest.HJ vulcanizate had the optimum carbon black dispersion,the largest tensile strength,and the best resistance to hot air aging.The rubber molecular structure and properties of HJ were better than those of SCRWF and SCR20.

关 键 词：天然橡胶 加工工艺 分子结构 硫化特性 物理性能 耐热空气老化性能 

分 类 号：TQ330.52[化学工程—橡胶工业] TQ332.1