摘要
用悬浮接枝共聚法合成乙烯-1-丁烯共聚物(PEB)与甲基丙烯酸甲酯(MMA)-丙烯腈(AN)接枝共聚物(PEB-g-MAN)。红外光谱(FT-IR)分析证实MMA-AN已经接枝在PEB分子链上。用PEB-g-MAN与苯乙烯-丙烯腈共聚物(SAN树脂)共混制备耐老化黄变性能优异的高抗冲塑料ABMS,研究AN在MMA-AN总投料量中的质量百分比fAN对ABMS冲击韧性和热稳定性的影响。结果表明:fAN为25%时,ABMS(PEB质量含量为25%)的韧性最好,缺口冲击强度达63.3 kJ/m2,且此时ABMS的热稳定性也最佳。SEM、DMA和TG的分析表明:fAN为25%时,ABMS的增韧机理为剪切屈服,PEB-g-MAN与SAN相容性最佳,ABMS的热稳定性最好。
PEB-g-MAN,synthesized by suspension grafting copolymerization of methyl methacrylate and acrylonitrile onto Poly（ethene-co-l-butene） （PEB）,was blended with styrene-acrylonitrile copolymer （SAN） to prepare a high impact plastics ABMS, The ABMS had excellent resistance to weatherability,yellow discoloration and ageing property. The graft copolymer was characterized by FTIR spectroscopy and the result showed that MMA-AN was grafted onto the PEB chains. When fAN （fAN was equal to AN/MMA-AN） was 25wt% ,ABMS had the highest Izod impact strength （63.3 kJ/m2, the content of PEB in ABMS was 25wt% ） and the best thermal stability. Also, DMA analysis of the blends showed that PEB-g-MAN and SAN were more compatible at this ratio than other ratio. SEM analysis of the blends showed that the toughening mechanism of ABMS was shear yielding.
出处
《塑料》
CAS
CSCD
北大核心
2010年第5期58-61,共4页
Plastics
