【作者】 郑华； 张勇； 彭宗林； 张隐西；

【Author】 Hua Zheng Yong Zhang Zonglin Peng Yinxi Zhang*(Research of Institute of Polymer Materials, Shanghai Jiao Tong University, Shanghai 200240)

【机构】 上海交通大学高分子材料研究所；

【摘要】 采用熔融插层的方法制备了三元乙丙橡胶(EPDM)/蒙脱土纳米复合材料。X-射线衍射和透射电镜的结果表明,该材料的结构为插层型纳米分散结构。研究了蒙脱土用量对该复合材料的力学性能、光学性能和热学性能的影响。实验结果表明,该纳米复合材料具有优良的力学性能。当蒙脱土的用量为15份时,该材料的拉伸强度和断裂伸长率分别为19.8 MPa和540%。由过氧化物硫化剂2,5-二甲基-2,5-二叔丁基过氧己烷制备的EPDM/蒙脱土纳米复合材料是半透明的,蒙脱土用量对材料的透光率影响较小,同时,蒙脱土用量几乎不影响材料的硫化性能。此外,材料的玻璃化转变温度和热分解温度也由于蒙脱土在基体中的纳米分散和基体与填料相互作用的增加而明显升高。更多还原

【Abstract】 Ethylene-propylene-diene rubber (EPDM)/organic montmorillonite (OMMT) nanocomposites were prepared through a melt-mixing process in an internal mixer. The nanoscale dispersion of OMMT in the EPDM matrix was verified by X-ray diffraction(XRD) and transmission electron microscopy(TEM), relating to an exfoliated morphology. The effects of OMMT content on the mechanical properties, optical properties and thermal properties of the EPDM/OMMT nanocomposites were studied. The experimental results showed that OMMT had good reinforcement on the EPDM vulcanizates. The tensile strength and tear stress of the EPDM/OMMT nanocomposites significantly increased with increasing OMMT content. When OMMT content was 15 phr,the tensile strength and elongation at break reached 22 MPa and 540%, respectively. The EPDM/OMMT nanocomposites cured by 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexane were semi-transparent and OMMT content had little influence on the curing behavior of the nanocomposites. The increases in the glass transition temperature and thermal decomposition temperature were observed in the nanocomposites and were supposed to be related with the nanoscale dispersion of the OMMT and the strong interaction between EPDM and OMMT.更多还原