CAJ | 학술논문

本文研究了乙烯-苯乙烯共聚物的苯乙烯阴离子接枝共聚合反应.讨论了反应温度、单体苯乙烯加入量、ES共聚物的分子相对质量以及ES共聚物中苯乙烯链节含量等因素对接枝共聚物ES-g-PS侧链链长的影响.40°C时,单体苯乙烯从6.0mL增加到24.0mL, ES-g-PS共聚物的侧链链长从4增长到20.温度大于40°C时,ES-g-PS共聚物的侧链链长变化不大(LS=4);温度为18°C时,加入6.0mL单体苯乙烯,侧链链长却达到18.ES共聚物的分子相对质量相近时,共聚物中苯乙烯链节含量(Fs)增加, ES-g-PS共聚物的侧链链长有所增长.DSC测定结果表明,在ES-g-PS接枝共聚物中PE和PS链段彼此微相分离.
본문연구료을희-분을희공취물적분을희음리자접지공취합반응.토론료반응온도、단체분을희가입량、ES공취물적분자상대질량이급ES공취물중분을희련절함량등인소대접지공취물ES-g-PS측련련장적영향.40°C시,단체분을희종6.0mL증가도24.0mL, ES-g-PS공취물적측련련장종4증장도20.온도대우40°C시,ES-g-PS공취물적측련련장변화불대(LS=4);온도위18°C시,가입6.0mL단체분을희,측련련장각체도18.ES공취물적분자상대질량상근시,공취물중분을희련절함량(Fs)증가, ES-g-PS공취물적측련련장유소증장.DSC측정결과표명,재ES-g-PS접지공취물중PE화PS련단피차미상분리.
As second part of our continuous efforts to develop functionalization of polyolefin, this paper describes a method to prepare graft copolymer from poly(ethylene-co-styrene), e.g. ES copolymer, with a relatively well-controlled mechanism. The chemistry involves the metallization of styrene units in ES copolymer and the subsequent anionic "living" graft copolymerization with styrene to produce effectively the polystyrene side trains with well-defined structure. The graft length of ES-g-PS is basically proportional to the quantity of styrene used in the graft copolymerization, and influenced by molecular weight, styrene composition in ES copolymer and the reaction temperature as well. The side train length of ES-g-PS can be controlled by the content of styrene as monomeer and the temperature. DSC studies reveal that the individual PE and PS segments in the graft copolymer are micro-phases separated.