利用玻璃化温度梯度制备天然橡胶类高阻尼弹性体材料  

Preparation of NR Type High Damping Elastomer by Using T_(g) Gradient

作　　者：黄瑞丽[1] 郭丙力 卢珣[1] 方红 HUANG Ruili;GUO Bingli;LU Xun;FANG Hong(South China University of Technology,Guangzhou 510640,China;Dongguan Goldensun Abrasives Co.,Ltd,Dongguan 523820,China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]东莞金太阳研磨股份有限公司,广东东莞523820

出　　处：《橡胶工业》2023年第2期83-90,共8页China Rubber Industry

基　　金：国家自然科学基金资助项目(51873065)。

摘　　要：利用天然橡胶(NR)与环氧化天然橡胶(ENR)良好的相容性,以及不同环氧化程度的ENR的玻璃化温度(T_(g))梯度差异,选用NR和3种不同环氧化程度的ENR(ENR-25,环氧化程度为25%;ERN-40,环氧化程度为40%;ENR-50,环氧化程度为50%)制得NR/ENR-25/ENR-40/ENR-50四元并用阻尼材料,研究由于NR和各ENR的T_(g)和用量差异产生的阻尼加和效应对并用胶在室温及以上温度的阻尼温域的拓宽情况。结果表明,当NR/ENR-25/ENR-40/ENR-50并用比为55/5/15/25,同时添加40份炭黑N330时,四元并用胶具有较好的综合性能,其有效阻尼温域(损耗因子大于0.3)为66℃(-15.3~50.7℃),拉伸强度可达17.2 MPa,拉断伸长率为571%。Based on the good compatibility between natural rubber(NR)and epoxidized natural rubber(ENR),and the gradient difference of glass transition temperature(T_(g))of ENR with different epoxidation degrees,NR and three ENRs(ENR-25,ENR-40 and ENR-50,with a epoxidation degree of 25%,40%,and 50%,respectively)were selected to prepare a high damping quaternary blends.The damping addition effect caused by the difference of T_(g) and the amount of NR and ENRs on the broadening of the damping temperature range of the compound at room temperature and above was studied.The results showed that,when the blending ratio of NR/ENR-25/ENR-40/ENR-50 was 55/5/15/25 and 40 phr carbon black N330 was added,the quaternary blend had better overall performance,and its effective damping temperature range(loss factor greater than 0.3)was 66℃(-15.3~50.7℃),the tensile strength reached 17.2 MPa,and the elongation at break was 571%.

关 键 词：天然橡胶 环氧化天然橡胶 并用胶 玻璃化温度 梯度 阻尼弹性体 

分 类 号：TQ332.6[化学工程—橡胶工业] TQ336.42