摘要
采用水溶液共聚法合成了丙烯酸-丁烯醛共聚物,使用IR1、3C-NM R及DSC表征了共聚物的结构。用称量法测定共聚合反应的转化率和反应速率,乌氏黏度计测定共聚物的特性黏数[η],并用其相对表征共聚物分子量大小。重点研究了共聚合条件对共聚合反应的转化率、反应速率及所得共聚物分子量的影响。实验结果表明,引发剂用量、单体浓度及聚合温度对共聚合反应和共聚物的分子量均有很大影响;丁烯醛对共聚合反应有抑制作用。
Acrylic acid-crotonaldehyde copolymer has been synthesized by the copolymerization of acrylic acid with crotonaldehyde in water using K2S2O8 as initiator and its structure was characterized by DSC, IR and ^13C-NMR. The conversion and rapid of copolymerization was deterimined by weight method. The intrinsic viscosity of the copolymers from which the molecular weight of copolymers can be estimated relatively was determined by using an Ubbelohde viscometer. The influence of reaction conditions was investigated respectively. The results show that initiator concentration, monomer concentration and reaction temperature have great effect on the conversion of copolymerization and the intrinsic viscosity [η] of acrylic acid-crotonaldehyde copolymer; the best reaction temperature is 50 ℃～60 ℃. It is found that the effect of crotonaldehyde on the copolymerization is inhibition; with the increase of crotonaldehyde ratio, the conversion and rapid of copolymeriztion decrease.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第6期113-117,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金(编号20304016)
中国科学院"西部之光"人材培养基金(98-17)资助项目
关键词
丙烯酸-丁烯醛共聚物
合成
表征
acrylic acid-crotonaldehyde copolymer
synthesis
characterization
