摘要
通过机械共混法制备了丁腈橡胶/有机蒙脱土(NBR/OMMT)纳米复合材料。利用X射线衍射(XRD)、透射电镜(TEM)对复合材料的结构进行表征。研究了OMMT用量对复合材料硫化性能、交联密度的影响。结果表明,少量的OMMT(5份)缩短了正硫化时间(t90),提高了交联密度。随着OMMT用量的增加(5～20份),t90逐渐延长,交联密度逐渐减小。对照炭黑的增强机理,对OMMT对橡胶的增强机理进行了初步探讨。从力学性能的变化趋势可以看出,随着OMMT用量的增加,拉伸强度提高。由此可知,OMMT对橡胶的增强机理是OMMT片层对橡胶大分子链的吸附作用。同时还研究了复合材料的热空气老化性能和热稳定性能。
Nitrile butadiene rubber/organic montmorillonite（NBR/OMMT） nanocomposites were prepared by mechanical blending.The structure of nanocomposites was characterized by XRD（X-ray Diffraction） and TEM（Transmission Electron Microscope）.The effect of OMMT amount on vulcanization properties and the crosslink density were studied.The results showed that the optimum cure time（t90） of the nanocomposite containing 5 phr OMMT shortened and the crosslink density increased compared with the pure NBR.While with the increasing of OMMT amount（5~20 phr）,t90 extended generally and the crosslink density decreased.The reinforcing mechanism of OMMT to the NBR rubber was discussed.With the increasing of the OMMT amount,the tensile strength of NBR/OMMT nanocomposites was improved.the reinforcing mechanism of OMMT was due to the adsorption of OMMT nanolayers to the rubber macromolecules.The hot air aging property and thermal stability of nanocomposites were also studied.
出处
《特种橡胶制品》
2011年第5期8-12,17,共6页
Special Purpose Rubber Products
基金
浙江丰虹新材料股份有限公司资助(FH1010)
