超细全硫化粉末丁腈橡胶/二元共聚氯醚橡胶共混物的结构与性能  

Morphology and properties of ultra-fine full-vulcanized acrylonitrile-butadiene powdery rubber/epichlorohydrin rubber blends

作　　者：刘俊杰[1] 张立群[1,2] 田明[1] 卢咏来[1] 

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029 [2]北京化工大学教育部纳米材料重点实验室,北京100029

出　　处：《合成橡胶工业》2009年第1期47-52,共6页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(50503003);北京市科技新星计划资助项目(2006A15)

摘　　要：采用熔融共混工艺制备了超细全硫化粉末丁腈橡胶(UFPNBR)/二元共聚氯醚橡胶(ECO)共混物,研究了共混物的相态结构、动态力学性能、物理机械性能及老化性能,并与丁腈橡胶(NBR)/ECO共混物进行了对比。透射电镜观察表明,在UFPNBR/ECO体系中,UFPNBR为分散相,ECO为连续相;而在NBR/ECO体系中,ECO为分散相,NBR为连续相。动态力学性能分析结果显示在共混质量比不超过50/50时,UFPNBR/ECO共混物只存在1个玻璃化转变温度;当共混质量比超过50/50时分散相尺寸较大,出现2个玻璃化转变温度,而NBR/ECO始终存在2个玻璃化转变温度。加入适量的UFPNBR(不超过50份,质量)能降低UFPNBR/ECO共混物的压缩永久变形。与NBR/ECO共混物相比,UFPNBR/ECO共混物的脆性温度较低,耐老化性能更好,但物理机械性能稍差。A novel ultra-fine full-vulcanized acrylonitrile-butadiene powdery rubber （UFPNBR）/epichlorohydrin rubber （ECO） blends were prepared by melt blending. The morphology, dynamic and static mechanical properties and aging properties of the blends were compared with those of acrylonitrilebutadiene rubber （ NBR）/ECO blends. The results of transmission electron microscope observations showed that ECO was continuous phase and UFPNBR was dispersion phase in UFPNBR/ECO system, whereas ECO was dispersion phase and NBR was continuous phase in NBR/ECO system. The results of dynamic mechanical thermal analysis indicated that only one glass transition temperature was observed when the mass ratio of UFPNBR to ECO was not more than 50/50. However, as the mass ratio of UFPNBR to ECO was more than 50/50, for the size of dispersion phase became larger, two glass transition temperatures appeared, but no matter how the mass ratio of NBR to ECO changed, two glass transition temperatures always exhibited for NBR/ECO blend. The results of mechanical properties measurement indicated that com- pression set of the blends could be decreased when appropriate amount of UFPNBR was added. Compared with NBR/ECO blend, the UFPNBR/ECO blend had low friability temperature and better aging resistance, but the mechanical properties were slightly worse than those of NBR/ECO.

关 键 词：超细全硫化粉末丁腈橡胶 二元共聚氯醚橡胶 共混 相态结构 动态力学性能 物理机械性能 

分 类 号：TQ333[化学工程—橡胶工业]