聚(苯乙烯-甲基丙烯酸烷基酯)高吸油树脂的合成及表征

采用悬浮聚合法制备了聚(苯乙烯-甲基丙烯酸烷基酯)高吸油树脂,考察了甲基丙烯酸烷基酯种类、单体配比、引发剂用量、交联剂用量和分散剂用量对高吸油树脂吸油率的影响。实验结果表明,当m(甲基丙烯酸十二酯)∶m(苯乙烯)=4∶3、引发剂过氧化二苯甲酰用量(占单体混和物的质量分数)为0.8%、交联剂二乙烯基苯用量(占单体混和物的质量分数)为0.8%、分散剂聚乙烯醇用量(占单体混和物的质量分数)为3%时,所合成的聚(苯乙烯-甲基丙烯酸十二酯)高吸油树脂对甲苯和三氯甲烷的吸油率分别为13.9,24.6g/g。并用傅里叶变换红外光谱、扫描电镜、热重和示差扫描量热法对高吸油树脂的结构和性能进行了表征。表征结果显示,制得的产物为苯乙烯与甲基丙烯酸烷基酯的共聚物,其使用温度可达130℃。

Synthesis and Characterization of Poly(Styrene-Methacrylate)Highly Oil Absorptive Resin

Cross-linked styrene-methacrylate highly oil absorptive resin was synthesized by suspension polymerization.The influences of alkyl methacrylate type,mass ratio of monomers,initiator dosage,crosslinking agent dosage,disperser dosage on resin properties were investigated.Suitable process conditions were:mass ratio of dodecyl methacrylate to styrene 4 ∶3,initiator benzoyl peroxide 0.8%(mass fraction in monomer mixture),crosslinker divinylbenzene 0.8%(mass fraction in monomer mixture),disperser polyvinyl alcohol 3%(mass fraction in monomer mixture),and oil absorptive power of obtained resin is about 13.9g/g for methylbenzene and 24.6g/g for chloroform.Structure and properties of the resin were investigated by means of IR,SEM,TG and DSC.FTIR and SEM determinations show that the resin is styrene-dodecyl methacrylate copolymer.TG and DSC measurements show that the resin can be used at 130℃.