通过电子束辐照研究了乙烯-甲基丙烯酸甲酯共聚物（EMMA）与三元乙丙橡胶（EPDM）不同共混比例材料的力学性能、硬度、交联度、结晶及形状记忆等,考察了辐照剂量和共混组分比例对材料性能的影响。结果表明,辐照提高了共混体系的力学性...通过电子束辐照研究了乙烯-甲基丙烯酸甲酯共聚物（EMMA）与三元乙丙橡胶（EPDM）不同共混比例材料的力学性能、硬度、交联度、结晶及形状记忆等,考察了辐照剂量和共混组分比例对材料性能的影响。结果表明,辐照提高了共混体系的力学性能和硬度,同时降低了结晶性能,这主要是由于辐照诱发了交联反应,使材料内部产生了交联结构。辐照交联为EMMA/EPDM共混物热收缩材料提供了形状回复的驱动力,但降低了形状固定率,通过控制交联度和结晶相所占比例,能够得到综合性能好的热收缩材料。当EMMA/EPDM（质量比）达到或高于3/7、辐照剂量控制在40~80 k Gy时,能够制备出满足基本要求的热收缩材料。展开更多
N-[4-(aminosulfonyl)phenyl]acrylamide (ASPAA) was synthesized through the reaction of acryloyl chloride with sulfanilamide,and copolymerized with acrylonitrile (AN) and methyl methacrylate (MMA),respectivety,in DMF so...N-[4-(aminosulfonyl)phenyl]acrylamide (ASPAA) was synthesized through the reaction of acryloyl chloride with sulfanilamide,and copolymerized with acrylonitrile (AN) and methyl methacrylate (MMA),respectivety,in DMF solvent using benzoyl peroxide as initiator at(70±0.5)℃.The copolymer composition was determined by using elemental analysis and the reactivity ratios of ASPAA/AN and ASPAA/MMA copolymerization systems were calculated by employing the Fineman-Ross and the Kelen-Tudos methods.The values of r 1 and r 2 obtained by the two methods fitted well with each other, i.e.r 1(ASPAA)=1.43,r 2(AN)=0.44 by Fineman-Ross method and r 1(ASPAA)=1.39,r 2(AN)=0.43 by Kelen-Tudos method for ASPAA/AN copolymerization system,and r 1(ASPAA)=0.88,r 2(MMA)=1.42 by Fineman-Ross method and r 1(ASPAA)=0.83,r 2(AN)=1.35 by Kelen-Tudos method for ASPAA/MMA copolymerization system.展开更多
文摘通过电子束辐照研究了乙烯-甲基丙烯酸甲酯共聚物（EMMA）与三元乙丙橡胶（EPDM）不同共混比例材料的力学性能、硬度、交联度、结晶及形状记忆等,考察了辐照剂量和共混组分比例对材料性能的影响。结果表明,辐照提高了共混体系的力学性能和硬度,同时降低了结晶性能,这主要是由于辐照诱发了交联反应,使材料内部产生了交联结构。辐照交联为EMMA/EPDM共混物热收缩材料提供了形状回复的驱动力,但降低了形状固定率,通过控制交联度和结晶相所占比例,能够得到综合性能好的热收缩材料。当EMMA/EPDM（质量比）达到或高于3/7、辐照剂量控制在40~80 k Gy时,能够制备出满足基本要求的热收缩材料。
文摘N-[4-(aminosulfonyl)phenyl]acrylamide (ASPAA) was synthesized through the reaction of acryloyl chloride with sulfanilamide,and copolymerized with acrylonitrile (AN) and methyl methacrylate (MMA),respectivety,in DMF solvent using benzoyl peroxide as initiator at(70±0.5)℃.The copolymer composition was determined by using elemental analysis and the reactivity ratios of ASPAA/AN and ASPAA/MMA copolymerization systems were calculated by employing the Fineman-Ross and the Kelen-Tudos methods.The values of r 1 and r 2 obtained by the two methods fitted well with each other, i.e.r 1(ASPAA)=1.43,r 2(AN)=0.44 by Fineman-Ross method and r 1(ASPAA)=1.39,r 2(AN)=0.43 by Kelen-Tudos method for ASPAA/AN copolymerization system,and r 1(ASPAA)=0.88,r 2(MMA)=1.42 by Fineman-Ross method and r 1(ASPAA)=0.83,r 2(AN)=1.35 by Kelen-Tudos method for ASPAA/MMA copolymerization system.
