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研究了甲基丙烯酸—丙烯酸—二乙烯基苯接枝聚丙烯(PP-g-P[MAA-co-AA-co-DVB])、甲基丙烯酸—丙烯酸—双甲基丙烯酸三甘醇酯接枝聚丙烯(PP-g-P[MAA-co-AA-co-TGDMA])和甲基丙烯酸—二乙烯基苯接枝聚丙烯(PP-g-P[MAA-co-DVB])等系列制成的笼形聚羧酸钠在水溶液中的溶胀行为。PP-g-P[MAA-co-AA-co-DVB)/Na笼形树脂的溶胀度与交联密度的平方根成反比。PP-g-P(MAA-co-AA-co-TGDMA)/Na笼形树脂的溶胀度与交联密度关系比较复杂,可能是交联链的构型在一定的交联密度范围内最有利于水分子的吸留,但仍能保持交联网络结构不发生扭转缠结。PP-g-P(MAA-co-DVB)/Na笼形树脂的溶胀度测定结果表明,树脂的溶胀度不但随交联密度发生变化,而且和树脂上羧基的分布密度有关,认为是同荷离子相互排斥所引起的网络扩张的结果。
The graft copolymerization of methacrylic acid-acrylic acid-divinylbenzene grafted polypropylene (PP-gP [MAA-co-AA-co-DVB] Cage poly (propylene) (PP-gP [MAA-co-AA-co-TGDMA]) and methacrylic acid-divinylbenzene grafted polypropylene The swelling behavior of sodium carboxylate in aqueous solution. The degree of swelling of PP-g-P [MAA-co-AA-co-DVB] / Na cage resin is inversely proportional to the square root of the crosslink density. The relationship between swelling degree and crosslinking density of PP-gP (MAA-co-AA-co-TGDMA) / Na cage resin is rather complicated. It may be that the cross-linked chain configuration is most conducive to water Molecular retention, but still can maintain the cross-linked network structure does not occur twisting. The swelling degree of PP-gP (MAA-co-DVB) / Na cage resin showed that the swelling degree of the resin not only changed with the crosslinking density, but also with the distribution density of carboxyl groups on the resin. Exclusion caused by the expansion of the network results.