摘要
将溶液聚合合成的α-甲基苯乙烯(AMS)和甲基丙烯酸缩水甘油酯(GMA)的低相对分子质量共聚物(计为PAG)作为大分子引发剂,分别研究了PAG引发单体甲基丙烯酸甲酯(MMA)和苯乙烯(St)的本体聚合反应,采用GPC和FTIR等手段对聚合产物进行了表征.研究结果表明,在加热到一定温度时,PAG具有引发作用,可以引发MMA和St进行本体聚合反应;聚合产物具有再引发功能,且其分子量与聚合物产率和聚合反应时间之间均有较好的线性关系.
The initiation of a novel macroinitiator is presented. The oligomers of α-methyl styrene （AMS） and glycidyl methacrylate （GMA） （designated as PAG） were used as macroinitiator in the bulk polymerization of methyl methacrylate （MMA） and styrene （St）. The polymerization of MMA was carried out at 90℃ and that of St at 100℃, respectively. The resulting copolymers were characterized by Fourier transform infrared spectroscopy （FFIR） and gel permeation chromatography （GPC）. The results indicated that the copolymers can be prepared by simply heating PAG in the presence of the second monomer, without any other initiator. During the process of polymerization of MMA, the higher AMS content in PAG led to higher monomer conversion, which suggested that the polymerization reaction was initiated by PAG. Under the certain reaction time, copolymers can be obtained from the reaction system of St and PAG, but there had nothing in the system of pure St. Also, the copolymers gained by polymerization of MMA initiated with PAG have the reinitiating reactivity, and the curve of molecular weight with reaction time （ Mn- t） has a well linear relation, as well as that of molecular weight with yield of copolymers （Mn-Y% ）. Based on the research results, the possible reaction mechanism has been put forward. This simple method is expected to be applied to some other monomers, and it might be suitable even for industrial applications.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2009年第6期576-580,共5页
Acta Polymerica Sinica
