恒黏天然橡胶/白炭黑复合材料的制备及性能  

Preparation and properties of constant adhesion natural rubber/silica composites

作　　者：蒋胜男 余尧 崔凯文 玄璐佳 卢娜[1] 桂红星 王洪振[1,2] JIANG Shengnan;YU Yao;CUI Kaiwen;XUAN Lujia;LU Na;GUI Hongxing;WANG Hongzhen(Key Laboratory of Rubber-Plastic,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China;Key Laboratory of Biology and Genetic Resources of Rubber Tree,Ministry of Agriculture/State Key Laboratory Incubation Base for Cultivation and Physiology of Tropical Crops/Experiment Station of Tropical Crops,Ministry of Agriculture,Danzhou 571737,China)

机构地区：[1]青岛科技大学高分子科学与工程学院橡塑材料与工程教育部重点实验室,山东青岛266042 [2]农业部橡胶树生物学与遗传资源利用重点实验室省部共建国家重点实验室培育基地/海南省热带作物栽培生理学重点实验室农业部儋州热带作物科学观测实验站,海南儋州571737

出　　处：《弹性体》2022年第5期41-48,共8页China Elastomerics

基　　金：国家自然科学基金项目(51703110);多功能阳离子型Janus粒子的批量制备及应用基础研究(ZR2020MB041)。

摘　　要：天然橡胶在贮存运输过程中会发生贮存硬化,进而影响后期加工中填料在橡胶基体中的分散。为解决天然橡胶因“贮存硬化”造成填料分散性下降的问题,本论文选用恒黏剂烷基肼化合物(OP)和恒黏剂盐酸羟胺(HH)对天然胶乳/白炭黑进行改性,制备了恒黏天然橡胶/白炭黑复合材料(CV-NR/SiO_(2)),并探究该复合材料的加工性能及各项物理机械性能。结果表明:恒黏剂OP和HH的加入使CV-NR/SiO_(2)的门尼黏度明显下降,Payne效应减弱;且OP用量为0.1份时,复合材料的抗湿滑性提升,滚动阻力降低;并且经比较,用恒黏剂OP改性后的CV-NR/SiO_(2)具有较好的物理力学性能和耐老化性能。此外,相较于空白样NR/SiO_(2),白炭黑在恒黏橡胶基体中的分布更加均匀,相容性和结合性有所提高。In the process of storage and transportation of natural rubber(NR),a small amount of aldehyde groups on the molecular chain will undergo hydroxylaldehyde condensation reaction,which makes the rubber molecular chain branch and cross-link,thus increasing the Meoney viscosity of the raw rubber(i.e.storage hardening)and affecting the dispersion of silica in the rubber matrix.In order to solve the problem of decreasing dispersity of filler caused by“storage hardening”of natural rubber,a constant viscosity alkyl hydrazine compound(OP)and a constant viscosity hydroxylamine hydrochloride(HH)were selected to modify natural latex/white carbon black to prepare a constant viscosity natural rubber/white carbon black composite(CV-NR/SiO_(2)).The processing,physical and mechanical properties of the composites and the dispersion of silica were investigated.The results show that the Mooney viscosity of CV-NR/SiO_(2) decreases obviously and Payne effect weakens with the addition of OP and HH.When the amount of OP is 0.1 phr,the wet slip resistance of the composite is improved and the rolling resistance is reduced.By comparison,CV-NR/SiO_(2) modified with constant viscosity OP has better physical and mechanical properties and aging resistance.In addition,compared with the blank NR/SiO_(2) sample,the distribution of silica in the constant viscosity rubber matrix is more uniform,and the compatibility and bonding properties are improved.

关 键 词：恒黏天然橡胶 白炭黑 复合材料 分散性 门尼黏度 

分 类 号：TQ332.5[化学工程—橡胶工业]