摘要
采用机械共混和模压成型工艺制备了天然橡胶(NR)/氯化丁基橡胶(CIIR)复合材料,并对其硫化性能、机械性能、单轴拉伸取向性能、应变诱导结晶(SIC)、阻尼行为等进行了分析。透射电子显微镜(TEM)的结果显示,CIIR组分在共混物中呈现海岛结构分布,且边界清晰。随着CIIR占比增大,拉伸应力应变性能与纯NR相一致,但拉伸强度比纯NR下降明显;通过红外二向色性法分析发现,共混物的取向行为主要源于NR组分;同步辐射广角X射线衍射(WAXD)的测试结果表明,共混物中CIIR占比越高,SIC行为越弱;通过机械共混的方式,可以制备得到两者特性结合的NR/CIIR共混物,30 Hz条件下损耗因子从NR纯胶的0.1,增加至NR/CIIR 50/50(质量比)的0.18,上升幅度达80%,为隔震支座用橡胶材料的制备提供新思路。
Natural rubber(NR)/chlorinated butyl rubber(CIIR)composites have been prepared by mechanical blending and molding.The vulcanization properties,mechanical properties,uniaxial tensile orientation proper-ties,strain-induced crystallization(SIC)and damping behavior of the composites were analyzed.Transmission electron microscopy(TEM)showed that CIIR components had an island structure distribution in the blends,and the boundaries were clear.With the increasing CIIR content,the compressive stress-strain properties were similar to those of pure NR,but the tensile strength decreased significantly compared with pure NR.Infrared dichroism analysis showed that the orientation behavior is mainly due to the NR component.Synchrotron radiation wide-angle X-ray diffraction(WAXD)analysis showed that the higher the proportion of CIIR,the weaker the SIC behavior.NR/CIIR blends with the characteristics of both precursors can be prepared by mechanical blending.The loss factor at 30 Hz increases from 0.1 for NR pure rubber to 0.18 for a 50/50 NR/CIIR blend,with an increase of 80%.This work provides new ideas for the preparation of rubber composite materials for shock insulation.
作者
王瑞欣
黄从岗
杨瑞宁
王刚鹏
WANG RuiXin;HUANG CongGang;YANG RuiNing;WANG GangPeng(China Aerospace Manufacturing Technology Research Institute,Beijing 100024;Beijing Xinxiang Polymer Materials Co.,Ltd.,Beijing 101500;Zhongke Fangcun Zhiwei Technology Co.,Ltd.,Nanjing 211135,China)
出处
《北京化工大学学报(自然科学版)》
北大核心
2025年第1期57-65,共9页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
