摘要
本文以硝酸铈铵为引发剂,研究了单体浓度、引发剂用量、反应温度和反应时间对淀粉与甲基丙烯酸甲酯(MMA)接枝共聚反应特征参数的影响。当引发剂浓度为4.5×10(-3)M/L,MMA浓度为0.225M/L,在30℃反应3.5h时,单体转化率C%=90.5%,接枝率G%=62%,接枝效率GE%=70%,接枝支链的粘均分子量M=×10(-3)。接枝共聚物及其与聚氯乙烯(PVC)共混物浇铸成膜后,用黑曲霉在无机盐营养培养基中降解40天,失重率分别为32%和23%,表明淀粉/MMA接枝共聚物可作为生物降解塑料使用。
Graft copolymer of corn starch and methyl methacrylate(MMA) was synthesed with ceric ammonium nitrate as initiator.The effect of monomer concentration,initiator concentration, reaction temperature and reaction time on monomer conversion (C%), grafting efficiency(GE%)and grafting(G%) has been also studied. The C%, GE% and G% approached the maximum of 90% ,70% and 62% as the monomer concentration and initiator concentration were raised to 0. 225 M·L(-1)and 4. 5×10(-3)M·L(-1) at 30℃ for 3.5 h respectively.The graft copolymer and its blending product with polyethylene chloride(PVC) show excellent susceptibility to fungal growth.Graft copolymer sample losing more than 32% of its weight after 40 day of incubation with Aspergillus niger and the blending product sample losing 2 3%. The result of biodegradation show that the copolymer and the blending may have application as a biodegradable plastic.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1994年第1期33-37,共5页
Polymer Materials Science & Engineering
关键词
共聚
淀粉
生物降解
甲基
s:corn starch,methyl methacrylate, ceric ammonium nitrate,biodegradability,graft copolymeriztion.