超支化聚合物增强剂的合成与表征

Synthesis and Characterization of the Hyperbranched Polymer Strengthening Agent

以顺丁烯二酸酐和二乙醇胺为原料,利用准一步法熔融聚合得到含碳碳双键的端羟基超支化聚合物AB2型单体,再以过硫酸铵为引发剂,与丙烯酸、二甲基二烯丙基氯化铵进行共聚合成了一种作为纸张增强剂的超支化聚合物。其中超支化聚合物单体、丙烯酸和二甲基二烯丙基氯化铵物质的量之比为2∶1∶1,过硫酸铵占单体总质量的1.0%,聚合温度为80～85℃,反应时间3 h,单体转化率98.6%,产品重均相对分子质量为51 300。

The hyperbranched unsaturated polymer monomer was synthesized using maleic anhydride and diethanolamine as start- ing materials. This monomer was then polymerized with acrylic acid and diallyl dimethyl ammonium chloride, by using ammonium persulfate as initiators to produce a paper strengthening agent. It was found that the polymerization performing at the molar ratio of 2 ： 1 ： 1 of the hyperbranched unsaturated polymer monomer, acrylic acid and diallyl dimethyl ammonium chloride, 3 % weight content of ammonium persulfate, temperature ranging from 80-85℃, and reaction time for 3 h, can achieve 98.6 % monomer conversion. The polymer had relative molecular mass of 51 300.