大孔高交联苯乙烯-双烯-A共聚物的合成及孔结构的研究

利用新型交联剂──双甲基丙烯酰氧苯基丙烷(双烯-A)与苯乙烯悬浮共聚合,以甲苯、异戊醇作致孔剂,合成了一系列大孔高交联共聚物。考察了双烯-A用量、甲苯/异戊醇配比、引发剂用量及分散剂用量对共聚物孔结构的影响,通过红外光谱、表现密度、全自动物理吸附仪及扫描电镜对干燥的共聚物小球进行了表征。结果表明,随交联利双烯-A含量的增加,苯乙烯-双烯-A共聚物的表面孔结构明显增大。共聚物的比表面积、孔容及孔径均随致孔剂中不良溶剂异戊醇含量的增加而明显增大。

Synthesis and the Porous Structure Studies of the Macroporous High Crosslinking styrene-divinyl-A Copolymers

Styrene-2,2-bismethacryloyloxyphenyl propane(divinyl-A) copolymers have been prepared by suspension copolymerization in the presence of toluene and using isoamyl alcohol as the diluents in the present paper.2,2-Bismethacryloyloxyphenyl propane (divinvl-A) as a novel crosslinking agent is first used in the synthesis of styrene type copolymer.A series of the macroporous and high crosslinking copolymers have been synthesized under different reaction conditions. The effects of the content of divinyl-A, type and content of these diluents,the amounts of initiator and PVA on the development of porosity of the copolymers are discussed. The characterization of the copolymers was carried out through the determination of apparenl density, specific area, pore volume and pore size.The appearance of the copolymer beads was examined by using scanning electron microscopy. It was found that the porosity of styrene-divinyl-A copoymers increased with the increase of the amount of divinyl-A. And the specific area, pore volume and pore size increased with the inerease of amount of unsuitable solvent (isoamyl alcohol) content in diluent mixture.