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以α-甲基苯乙烯(AMS)、马来酸酐(MANH)为共聚单体,偶氮二异丁腈(AIBN)为引发剂,采用自稳定沉淀聚合法合成了α-甲基苯乙烯和马来酸酐的共聚物,再将其皂化后得到具有引发和乳化双重作用的共聚物.该共聚物可以作为大分子引发剂再引发甲基丙烯酸甲酯(MMA)进行无皂乳液聚合.采用扫描电镜、红外光谱仪、乌氏黏度计等仪器对AMS-MANH共聚物以及乳液聚合产物进行了表征.结果表明,乳液聚合产物是以PMMA为主长链,AMS和MANH低聚物为短链的嵌段共聚物.单体最高转化率可达到85%,特性黏数在80 mL/g左右.乳胶粒子粒径在150～200 nm之间.聚合速率随着引发剂浓度的增加而增大,聚合物的特性黏数随着转化率的提高基本呈线性增大.
A-methylstyrene (AMS), maleic anhydride (MANH) as comonomer, azobisisobutyronitrile (AIBN) as initiator, the use of self-stable precipitation polymerization synthesis of α-methylstyrene and Maleic anhydride, which was then saponified to obtain a copolymer with dual dual functions of priming and emulsification.The copolymer could be used as a macroinitiator to re-initiate the soap-free emulsion polymerization of methyl methacrylate (MMA) AMS-MANH copolymer and emulsion polymerization products were characterized by means of electron microscope, infrared spectroscopy and Ubbelohde viscometer.The results showed that the emulsion polymerization products were short-chain embedded with PMMA as the main chain and AMS and MANH as the short chain The maximum conversion of monomer was 85%, the intrinsic viscosity was about 80 mL / g, the particle size of latex particles was between 150 and 200 nm, the polymerization rate increased with the increase of initiator concentration, The intrinsic viscosity of the material increases linearly with the increase of conversion rate.