SiO2含量和共混方法对NR／PP共混型热塑性弹性体的影响  

Nano-Silica Filled Natural Rubber/Isotactic Polypropylene Thermoplastic Vulcanizates

作　　者：王蕊[1,2] 黄茂芳[1] 吕明哲[1] 高天明[1] 

机构地区：[1]中国热带农业科学院农产品加工研究所,农业部热带作物产品加工重点开放实验室,广东湛江524001 [2]中国热带农业科学院橡胶研究所,海南儋州571737

出　　处：《高分子材料科学与工程》2012年第6期76-79,共4页Polymer Materials Science & Engineering

基　　金：海南省自然科学基金资助项目(509011);中国热带农业科学院橡胶研究所基本科研业务费专项资金项目(1630022011030)

摘　　要：采用两种共混方法制备天然橡胶(NR)/聚丙烯(PP)/纳米二氧化硅(SiO2)热塑性弹性体,采用透射电镜(TEM)、动态热机械(DMA)分析、橡胶加工分析仪(RPA)和力学性能测试研究了共混方法和SiO2的填充量对NR/PP/SiO2热塑性弹性体力学性能、形态结构和流变行为的影响。研究结果表明,当纳米SiO2的填充量较低(<3phr),共混方法对SiO2的分散影响较大,当SiO2主要分散在PP基体相中时,其对热塑性弹性体的补强作用明显;随着纳米SiO2的填充量的增加(≥3phr)时,SiO2趋向于分散在NR相中,共混方法对SiO2的分散影响不大。Two processing methods were employed to prepare natural rubber（NR）/polypropylene（PP）/nano-silica（SiO2） ternary thermoplastic vulcanizates（TPVs）.Mechanical properties test,transmission electron microscope（TEM）,dynamic mechanical analysis（DMA） and rubber processing analyser（RPA） were used to study the effect of the processing method and SiO2 content on the structure and performance of the NR/PP/SiO2 TPVs.It was found that the processing method had influence on the distribution of SiO2 particles at lower SiO2 loading（〈3 phr）,and SiO2 particles can effectively reinforce the TPV sample when SiO2 particles were mainly dispersed in PP phase.However,when the SiO2 loading increased to 3 phr,SiO2 particles were mainly dispersed in NR phase and the processing method had little influence on the phase morphology.

关 键 词：天然橡胶 聚丙烯 热塑性弹性体 纳米二氧化硅 共混方法 

分 类 号：TQ334.9[化学工程—橡胶工业]