摘要
与主链含有聚丁二烯双键结构的ABS树脂相比,采用主链不含双键结构的聚烯烃弹性体EPDM、EPM和PEB与St、AN和/或MMA混合单体的接枝共聚物EPDM-g-SAN、EPDM-g-MAN、EPM-g-MAN和PEB-g-MAN作为增韧剂,分别与SAN树脂熔融共混制备了EPDM-g-SAN/SAN树脂、EPDM-g-MAN/SAN树脂、EPM-g-MAN/SAN树脂和PEB-g-MAN/SAN树脂,并对其耐热氧老化性能和耐人工气候老化性能进行了研究。结果表明,老化1 000 h后,ABS树脂的缺口冲击强度保持率急剧下降至41.0%,且变色等级为严重变色,而EPDM-g-SAN/SAN树脂、EPDM-g-MAN/SAN树脂、EPM-g-MAN/SAN树脂和PEB-g-MAN/SAN树脂的缺口冲击强度保持率分别达到72.0%、83.6%、85.4%和90.3%,且变色等级仅为明显变色,说明EPDM-g-SAN/SAN树脂、EPDM-g-MAN/SAN树脂、EPM-g-MAN/SAN树脂和PEB-g-MAN/SAN树脂的耐老化性能显著优于ABS树脂。
In comparison with ABS resin with double bonds on the backbones of polybutadiene, EPDM-g-SAN/SAN resin, EPDM-g-MAN/SAN resin, EPM-g-MAN/SAN resin and PEB-g-MAN/SAN resin were separately prepared by melt blending SAN resin with EPDM-g-SAN, EPDM-g-MAN, EPM-g-MAN and PEB-g-MAN, which were respectively synthesized by grafting eopolymerization of St, AN and/or MMA mixed monomers from EPDM, EPM and PEB polyolefin elastomers without double bonds on their backbones. The thermal oxidative aging resistance and weathering resistance properties of all the blends aforementioned were studied. It turned out that after 1 000 h aging test, ABS resin was badly discolored and its notched impact strength retention sharply decreased to 41.0%. By contrast, EPDM-g-SAN/SAN resin, EPDM-g-MAN/SAN resin, EPM-g-MAN/SAN resin and PEB-g-MAN/SAN resin were all obviously discolored and their notched impact strength retentions only decreased to 72.0% , 83.6% , 85.4% and 90.3% respectively. As a result, the aging resistance properties of EPDM-g- SAN/SAN resin, EPDM-g-MAN/SAN resin, EPM-g-MAN/SAN resin and PEB-g-MAN/SAN resin were significantly better than those of ABS resin.
出处
《塑料》
CAS
CSCD
北大核心
2018年第1期69-71,共3页
Plastics
