液体天然橡胶对湿法混炼制备NR/白炭黑复合材料的增容机理研究  

Study on compatibilizing mechanism of liquid natural rubber for natural rubber/silica composites prepared by wet mixing

作　　者：何凡[1,2] 吴雨阳[1,2] 袁天元 廖双泉[1,2] 

机构地区：[1]海南大学材料与化工学院,海口570228 [2]海南大学热带岛屿资源先进材料教育部重点实验室,海口570228

出　　处：《功能材料》2017年第4期4149-4153,4158,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51363006);公益性行业(农业)科研专项经费资助项目(201403066);海南省重大科技计划资助项目(ZDKJ2016020-02)

摘　　要：采用液体天然橡胶(liquid natural rubber)为增容剂,基于湿法混炼工艺制备天然橡胶/白炭黑(W(NR/SiO_2))复合材料。利用FT-IR、SEM、万能拉力机分别对复合材料的微观结构、拉伸断裂形貌及力学性能进行分析,通过Mooney-Rivilin方程和界面相互作用方程对橡胶-填料界面相互作用定量计算,并探讨了LNR的增容机理。结果表明,使用LNR增容后,NR与白炭黑两相界面变得模糊,断面表现为韧性断裂;硫化胶力学性能在LNR改性后得到改善,白炭黑用量为60phr时表现最为明显,拉伸强度提高了25.73%;不同方程计算结果表明,白炭黑用量一定情况下,使用LNR增容后复合材料两相界面相互作用增强。LNR具有良好的增容效果,复合材料良好的相容性是LNR与NR和白炭黑两相同时发生作用形成增容界面的结果。Natural rubber/silica composites（NR/SiO2 ） was prepared by wet mixing technology with liquid natu ral rubber （LNR） as compatibilizer. Micro-Structure, tensile fracture surface, mechanical properties and filler- rubber interaction were studied by scanning electron microscopy, FT-IR spectroscopy and universal tensile ma chine. The rubber-filler interaction was evaluated by Mooney-Rivilin equation and interracial interaction equation quantitatively. The compatibilizing mechanism of LNR for W（NR/SiO2） composites was also investigated. The results showed that the SiO2 particles are tightly encompassed by NR in the presence of LNR and fracture sur- faces appeared toughness fracture; good mechanical properties was observed, the tensile strength increase by 25.73% when silica was 60 phr; the equations showed that filler rubber interaction have great enhancements un- der certain amount of silica. It is reveal that LNR has better compatibility, which is attributed to LNR reaction with both NR and SiO2 to form compatibilizing interface.

关 键 词：天然橡胶 白炭黑 复合材料 液体天然橡胶 增容 

分 类 号：TQ332.5[化学工程—橡胶工业]