无水AlCl_3催化苯乙烯-丙烯腈共聚物/三元乙丙橡胶就地相容化  

In-Situ Compatiblization of SAN/EPDM Blends Catalyzed by Anhydrous Aluminium

作　　者：徐建平[1] 董银春 郜志刚[1] 龚方红[1] 刘春林[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213100

出　　处：《高分子材料科学与工程》2015年第8期123-127,共5页Polymer Materials Science & Engineering

基　　金：江苏省产学研基金资助项目(BY2013024--08)

摘　　要：采用扭矩分析、凝胶含量和力学性能测定、共混物热分析、界面形态观察等方法考察了无水Al Cl3催化剂用量对苯乙烯-丙烯腈共聚物(SAN)和三元乙丙橡胶(EPDM)大分子间Friedel-Crafts烷基化反应的影响,并与不同量过氧化物催化进行比较。结果表明,在m(SAN)/m(EPDM)为60.0∶40.0共混物中加入0.4%无水Al Cl3有利于生成较多的EPDMg-SAN接枝共聚物,SAN接枝率为2.1%,与简单共混物相比,增容体系力学性能得到明显提高,拉伸强度从17.5 MPa提高至23.5 MPa,断裂伸长率从2.1%提高至6.7%;进一步提高Al Cl3用量,SAN中侧链氰基和铝离子络合作用增强,导致共混物的MFR、SAN接枝率、力学性能下降,SAN玻璃化转变温度提高;SAN相对分子质量随着Al Cl3用量增加略有下降。以无水Al Cl3为催化剂,SAN接枝率及共混物力学性能明显优于过氧化物催化剂。Using torque analysis,determination of gel content and mechanical properties,thermal analysis,the interface morphology observation and other methods,effects of the amount of anhydrous aluminum chloride（ Al Cl3） on Friedel-Crafts alkylation reaction between poly（ ethylene-propylene-diene monomer）（ EPDM） andstyrene-acrylonitrile copolymer（ SAN） were investigated. The results show that adding 0. 4% Al Cl3 to m（ SAN） / m（ EPDM）（ 60. 0∶ 40. 0）blends helps to produce more EPDM-g-SAN copolymer,and the grafting-ratio of SAN is 2. 1%. The mechanical properties of the compatibilized blends are improved notably compared to those of the mechanical blends,for example,the tensile strength is increased from 17. 5 MPa to 23. 5 MPa and its elongation at break is increased from 2. 1% to 6. 7%. If the dosage of Al Cl3 is increased further,the complexing abilities between the cyanogroup of side chains of SAN and aluminum cations are enhanced,and result in decreasing of MFRs,mechanical properties of the SAN / EPDM blends and grafting-ratios of SAN,increasing of the glass transition temperatures of SAN. The molecule weight of SAN in the blends declines very slightly when the dosage of Al Cl3 is increased further. With anhydrous aluminum chloride（ Al Cl3） as catalyst,the SAN grafting-ratio and mechanical properties of SAN / EPDM blends are obviously better than using the peroxide catalyst.

关 键 词：苯乙烯-丙烯腈共聚物 三元乙丙橡胶 原位增容 FRIEDEL-CRAFTS烷基化反应 

分 类 号：TQ333.4[化学工程—橡胶工业]