P(AN-MA-AMPS)共聚物的制备及其溶液的流变性能研究

Preparation and rheological properties of P(AN-MA-AMPS)copolymer

以丙烯腈(AN)、丙烯酸甲酯(MA)和2-丙烯酰胺-2-甲基丙烯磺酸(AMPS)为反应单体,以偶氮二异丁腈(AIBN)为引发剂,通过溶液聚合制备三元共聚物P(AN-MA-AMPS);在AN/MA/AMPS质量比为97.51.51.0的聚合体系下,研究反应条件对单体转化率、产物相对分子质量的影响;配制不同浓度的P(AN-MA-AMPS)溶液,研究P(AN-MA-AMPS)溶液的流变性能。结果表明:共聚反应的单体转化率随反应时间、反应温度、单体浓度和引发剂用量的提高均相应提高;P(AN-MA-AMPS)的相对分子质量随反应时间的增加而提高,随单体浓度的增加先升后降,随反应温度和引发剂用量的提高而下降;较佳的共聚反应条件为总单体质量分数22%、引发剂质量分数0.6%、反应温度60℃、反应时间12 h;P(AN-MA-AMPS)溶液的表观黏度、储能模量和损耗模量均随温度升高而降低,随溶液固含量增加而增大。

A ternary copolymer of poly(acrylonitrile-methyl acrylate-2-acrylamido-2-methylpropane sulfonic acid)(P(AN-MA-AMPS))was prepared using AN,MA and AMPS as reaction monomers and azodiisobutyronitrile(AIBN)as an initiator by solution polymerization.The effects of reaction conditions on the monomer conversion rate and relative molecular mass of the products were studied for the polymerization system with an AN/MA/AMPS mass ratio of 97.51.51.0.The rheological properties of P(AN-MA-AMPS)solutions were studied at different P(AN-MA-AMPS)concentrations.The results showed that the monomer conversion rate of copolymerization reaction increased with the increase of reaction time,reaction temperature,monomer concentration and initiator dosage;the relative molecular mass of P(AN-MA-AMPS)increased with the increase of reaction time,first increased and then decreased with the increase of monomer concentration,and decreased with the increase of reaction temperature and initiator dosage;the optimal copolymerization reaction conditions were a total monomer mass fraction of 22%,an initiator mass fraction of 0.6%,a reaction temperature of 60℃,and a reaction time of 12 h;and the apparent viscosity,storage modulus and loss modulus of P(AN-MA-AMPS)solution decreased with the increase of temperature and increased with the increase of solid content of the solution.