CAJ | 학술논문

通过直接酯化法和乳液聚合法分别合成了甲基丙烯酸十二酯单体及聚合物,测定了聚合物的特性粘数和粘均分子量.通过正交试验合成了具有较高粘均分子量(Mη＞107)的产物.分别测定了单体及聚合物的红外光谱.研究发现随着引发剂浓度的降低,还原剂的增加,乳化剂的增加,可提高产物的粘均分子量;反应时间的延长可同时提高产物的粘均分子量和产率.研究同时发现加入另一种乳化剂Triton X-100可稳定乳液,产物的粘均分子量从1.17×107提高到1.75×107.
통과직접지화법화유액취합법분별합성료갑기병희산십이지단체급취합물,측정료취합물적특성점수화점균분자량.통과정교시험합성료구유교고점균분자량(Mη＞107)적산물.분별측정료단체급취합물적홍외광보.연구발현수착인발제농도적강저,환원제적증가,유화제적증가,가제고산물적점균분자량;반응시간적연장가동시제고산물적점균분자량화산솔.연구동시발현가입령일충유화제Triton X-100가은정유액,산물적점균분자량종1.17×107제고도1.75×107.
Dodecyl methacrylate was synthesized as the intermediate monomer for the preparation of Poly (dodecyl methacrylate)s and poly (dodecyl methacrylate)s were synthesized with emulsion polymerization techniques. Intrinsic viscosities were measured and viscosity average molecular weights were calculated. And then the polymers of dodecyl methacrylate with ultra-high molecular weight (Mη＞ 107) were synthesized through orthogonal experiments. IR Spectra of Dodecyl Methacrylate monomer and polymer were examined. The factors which influence the molecular weight were studied.The studies show that Mη increases with the initiator concentration decreasing, the reducer concentration increases and the emulsifier concentration increasing. Mη and the conversion increase with the reaction time prolonged. The studies also show that addition of another emulsifier (Triton X-100) can stabilize the emulsion and the Mηof products is enhanced from 1.17 × 107 to 1.75 × 107.