摘要
采用乳液聚合技术合成的丙烯腈-丁二烯-苯乙烯共聚物（ABS）和马来酸酐（MAn）接枝的ABS接枝共聚物（ABS-g-MAH）作为聚酰胺6（PA6）的增韧剂。红外光谱（FTIR）研究表明MAH在接枝共聚物中以接枝共聚和游离共聚两种方式存在；流变性能结果显示，随着MAH用量的增加，PA6／ABS-g-MAH共混体系扭矩逐渐上升；透射电镜（TEM）观察发现，ABS在PA6中发生明显的聚集，相区尺寸很大，随着MAH的引入，ABS相形态得到改善，当MAH含量高于1％时，ABS在PA6中均匀分散，表明基体与分散相的相容性得以提高；与PA6／ABS相比，PA6／ARS-MAH的脆一韧转变温度向低温方向移动，冲击韧性提高；扫描电镜（SEM）结果表明，PA6／ABS-g-MAH共混体系的形变机理是PA6基体的剪切屈服和ABS-g-MAH橡胶粒子的空洞化。
Acrylonitrile-butadiene-styrene copolymer（ABS） was reacted with maleic anhydride （MAH） to form ABS-g-MAH. FTIR showed that some of styrene-acrylonitrile-MAH（SAM） copolymer grafted onto the polybutadiene particles and the other ungrafted SAM existed as free copolymers. Both ABS and ABS-g-MAH were employed separately as a toughener of PA6. Reological tests displayed that the torque values and temperature of PA6/ABS-g-MAH melts increased with increasing MAH contents. TEM observation showed ABS formed big domains in PA6 whereas ABS-g-MAH achieved a good dispersion. Compared with PA6/ABS blends, the brittle-ductile transition temperature of PA6/ABS-MAH blends shifted to lower temperatures and the toughness was higher. SEM showed shear yielding of PA6 matrix and cavitation of rubber phase were the major deformation mechanisms of PA6/ABS-g-MAH blends.
出处
《中国塑料》
CAS
CSCD
北大核心
2007年第3期20-25,共6页
China Plastics
基金
吉林省科技发展计划项目（20060501）资助
关键词
聚酰胺6
马来酸酐接枝丙烯腈-丁二烯-苯乙烯共聚物
乳液聚合
增韧
形变机理
polyamide 6
maleic anhydride grafted acrylonitrile-butadiene-styrene copolymer
emulsion polymerization
toughening
deformation mechanism
