新型磺化共聚物的合成及其溶液性能

Synthesis and Solution Properties of a Sulfonated Allyl Biphenyl Ether-Acrylamide-Acrylic Acid Terpolymer

以烯丙基-联苯基醚(ABE)为疏水单体、十二烷基硫酸钠为表面活性剂、偶氮二异丁腈为引发剂,采用乳液自由基聚合法合成了ABE-丙烯酰胺(AM)-丙烯酸(AA)三元共聚物,并以浓硫酸和发烟硫酸为磺化剂对ABE-AM-AA三元共聚物进行磺化改性得到了新型磺化共聚物。采用FTIR和1H NMR方法对磺化共聚物进行了结构表征,并采用TG方法分析了它的热稳定性。表征结果显示,磺化共聚物中含有ABE、AM和磺酸基结构单元;磺酸基的引入对磺化共聚物的热稳定性影响较小。考察了磺化共聚物的溶解性及其溶液性能。实验结果表明,当磺化度为0.56时,磺化共聚物的增黏效果较好;ABE单体的引入使磺化共聚物的溶液具有明显的临界缔合特征和良好的耐温抗盐性能。

A novel allyl biphenyl ether（ABE）-acrylamide（AM）-acrylic acid（AA） terpolymer was synthesized by emulsion polymerization with ABE as the hydrophobic monomer, lauryl sodium sulfate as the surfactant and azodiisobutyronitrile as the initiator. Water-soluble sulfonated terpolymers with different sulfonated degree were synthesized with concentrated sulfuric acid and oleum as the sulfonating agents. The terpolymer and sulfonated terpolymers were characterized by means of FTIR, IH NMR and TG. The results show that the sulfonated terpolymers contain the units of ABE, AM and sulfonic groups. The influence of the sulfonic groups on the thermal stability of the sulfonated terpolymers is little. The solubility of both the terpolymer and the sulfonated terpolymers, and the properties of their solutions were studied. The results indicate that the sulfonated terpolymer with the sulphonated degree of 0.56 possesses a good tackability. The sulfonated terpolymer has obvious critical association feature and exhibits better temperature-tolerance and salt-resistance due to the introduction of ABE.