摘要
通过扭矩测定,傅里叶变换红外光谱、差示扫描量热法分析等方法研究了苯乙烯-丙烯腈共聚物(SAN)与聚烯烃弹性体(POE)大分子间的Friedel-Crafts烷基化反应。结果表明:适量无水AlCl3可以引发SAN与POE发生Friedel-Crafts烷基化反应,生成的POE-g-SAN接枝共聚物起到了原位增容POE/SAN共混物的作用,提高了其力学性能;当m(POE)/m(SAN)为60.0∶40.0,反应温度为180℃,AlCl3用量为0.4 phr时,POE/POE-g-SAN/SAN共混物性能较好;进一步提高AlCl3用量,SAN分子结构中侧链氰基与铝离子络合作用增强,导致SAN分散相聚集,POE/POE-g-SAN/SAN共混物刚性下降。
： The Friedel-Crafts alkylation reaction between styrene-aerylonitrile copolymer （SAN） and poly- olefin elastomer （POE） was studied by means of torque analysis, Fourier transform infrared spectroscopy （ FTIR ）, differential scanning calorimetry （DSC）, etc. The results show that the graft copolymer （POE-g-SAN） can be in-situ formed in POE/SAN blends via a Friedel-Crafts alkylation reaction with appropriate amount of A1CI3. The graft copolymer behaves as an in-situ compatibilizer of POE/SAN blends and improves the mechanical properties of the blends. The properties of POE/SAN blends get better when the mass ratio of POE to SAN is 60.0 ： 40.0, the reaction temperature is 180 ~C and the content of A1C13 is 0.4 phr. If the dosage of AIC13 is increased further, the complexing abilities between the cyanogroup of side chains of SAN and aluminum cations are enhanced; con- sequently, the rigidity of the blends declines due to the aggregation of SAN dispersed phase.
出处
《合成树脂及塑料》
CAS
北大核心
2013年第3期12-15,38,共5页
China Synthetic Resin and Plastics
关键词
聚烯烃弹性体
苯乙烯-丙烯腈共聚物
烷基化反应
原位增容
polyolefin elastomer
styrene-acrylonitrile copolymer
Friedel-Crafts alkylation reaction
in situ compatibilization
