N取代丙烯酰胺的等离子体引发聚合及聚合物性能研究  

The Plasma Initiated Polymerization of N-Substituted Acrylamides and Properties of Polymers

作　　者：朱健[1] 朱秀林[1] 程振平[1] 路建美[1] 张正彪[1] 

机构地区：[1]苏州大学理学院化学化工系,苏州215006

出　　处：《应用化学》2002年第1期53-57,共5页Chinese Journal of Applied Chemistry

基　　金：江苏省自然科学基金资助项目 ( BK2 0 0 114 1)

摘　　要：通过等离子体引发溶液聚合的方法制备了 N ,N -二甲基丙烯酰胺 ( DMAA)和 N ,N -二乙基丙烯酰胺 ( DEAA)聚合物 PDMAA和 PDEAA.实验结果表明 ,对 DMAA及 DEAA,转化率随后聚合时间、放电时间延长而增大 ,单体质量分数以 5 0 %为佳 ;对 DEAA转化率随放电功率的增大而增加 ,而对 DMAA转化率以 1 5 0 W为佳 .对 PDMAA的吸水率 ,后聚合时间以 4 h为佳 ,放电时间延长吸水率下降 ,而放电功率对吸水率的影响不大 ;对 PDEAA的吸水率 ,后聚合时间以 8d为佳 ,放电时间延长、放电功率增加吸水率下降 .同时对所得的聚合物的吸水率和温度的关系作了考察 ,结果发现 PDMAA具有最高临界共溶温度区域为 2 0～30℃ ,而 PDEAA则具有最低临界共溶温度为 31℃ ,而且它们的最高吸水率达一百多倍 ,是传统方法制备的同类聚合物的吸水率的 4～ 1 0倍 .Poly(N,N-dimethylacrylamide)(PDMAA) and poly(N,N-diethylacrlyamide)(PDEAA) were obtained from the monomers of N,N-dimethylacrylamide(DMAA) and N,N-diethylacrlyamide(DEAA) in aqueous by plasma-initiated polymerization at low temperature. The results showed that the conversion of two monomers increased with post-polymerization time and discharge duration, the conversion of DEAA increased with discharge power, but the power had little influence on the conversion of DMAA, and the optimum mass fraction of the two monomers were 50%. The effect of post-polymerization time, discharge power, discharge duration and mass fraction of monomer on water-absorbing power of polymers were also investigated and found that the optimum post-polymerization time was about 4 h (for PDMAA) and 8 d (for PDEAA) respectively, the absorbencies of both PDMAA and PDEAA decreased with the increasing of discharge duration, and the absorbency of PDEAA decreased with the increasing of discharge power, but it had little influence on the absorbency of PDMAA. The thermal sensitivities of the polymers were studied and found that PDMAA showed a higher critical solution temperature(HCST) within the scope of 20~30 ℃, while PDEAA showed a lower critical solution temperature(LCST) at 31 ℃. The highest water-absorbing power of the polymers reached more than 100 g/g, which was 4~10 times that of the polymer synthesized by conventional method.

关 键 词：N取代丙烯酰胺 等离子体引发聚合 温敏树脂 聚酰胺 性能 吸水率 

分 类 号：O633.22[理学—高分子化学] TQ323.6[理学—化学]