马来酸酐-丙烯酸共聚物的合成

Synthesis of Maleic Anhydride-acrylic Acid Copolymer

以马来酸酐和丙烯酸为单体,过硫酸钠为引发剂,亚硫酸氢钠为还原剂,采用水溶液聚合法,合成了用作洗衣粉代磷助剂的马来酸酐-丙烯酸共聚物[m(马来酸酐)∶m(丙烯酸)=1∶2].引发剂和还原剂分别为单体质量的4.0%和1.9%,聚合反应温度90℃,保温1h.产物为粘度较低的透明液体,分散性好,色泽浅,螯合力为518mgCaCO3/g.

With sodium persulfate as the initiator and sodium hydrosulfite as the reducer, maleic anhydride and acrylic acid were copolymerized in an aqueous solution to synthesize the tittle copolymer, which can be used as STPP substitute in laundry powder. The weight ratio of maleic anhydride to acrylic acid was 1∶2. The weight percentages of the initiator and the reducer to the monomers were respectively 4.0% and 1.9%. The polymerization was carried out at 90 ℃ for 1 h. The production was a transparent liquid with a low viscosity and at light colour. It has good dispersivity and the chelating power was 518 mg CaCO3/g.