超高分子量淀粉接枝丙烯酰胺-丙烯酸共聚物的合成  

GRAFT COPOLYMERIZATION ONTO STARCH WITH AM-AC IN INVERSE EMULSION

作　　者：杨锦宗[1] 曹亚峰[1] 刘兆丽[2] 马希晨[2] 

机构地区：[1]精细化工国家重点实验室大连理工大学化工学院精细化工系,辽宁大连126012 [2]大连轻工业学院化工系,辽宁大连116034

出　　处：《高分子材料科学与工程》2004年第5期89-92,共4页Polymer Materials Science & Engineering

摘　　要：以淀粉为基材、丙烯酰胺(AM)、丙烯酸(AC)为聚合单体,采用氧化还原引发体系,通过反相乳液聚合技术,合成接枝聚合物。以非离子表面活性剂为乳化剂,讨论了合成工艺条件对产品性能的影响。结果表明,m[(NH4)2S2O3]∶m[(NH2)2CO]=2.5∶1.8为引发体系,m(Span20)∶m(OP4)=40∶60为乳化剂,m(淀粉)∶m(单体)=1∶1.5时,接枝率可达148%,特性粘数可达1520mL/g。A graft copolymer was synthesized by graft copolymerization of starch with acrylamide(AM) and acrylic acid(AC). The graft copolymerization was carried out using redox initiator in inverse emulsion in the systems of Span, Tween, OP and their mixture respectively as emulsifirs. This article discussed the effect of initiation system and emulsifying kind and graft copolymerization temperature and monomer proportion on monomer conversion and graft copolymerization and specific viscidity. Result shows that the mixture of Span20 and OP4 as emulsifiers, when concentration of mixture emulisifier is (6%), the mixture of (NH_4)_2S_2O_8 and (NH_2)_2CO as initiator, mass ratio of starch ∶ monomer was 1∶ (1.5), the grafting ratio is (148%) and specific viscidity is 1520 mL/g.

关 键 词：超高分子量淀粉 接枝共聚 丙烯酰胺-丙烯酸共聚物 反相乳液聚合 非离子表面活性荆 特性粘数 阴离子化度 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]