添加剂对聚N,N-二乙基丙烯酰胺温度敏感性的影响  

The influence of additives on thermosensitivity of poly(N,N-diethylacrylamide)

作　　者：卞凤玲[1] 柳明珠[1] 

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2003年第1期54-58,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：兰州大学化学化工学院中青年教师科研启动基金资助项目 .

摘　　要：通过自由基聚合 ,合成了线型聚 N,N-二乙基丙烯酰胺 ( LPDEA)和交联聚 N,N-二乙基丙烯酰胺( CPDEA) .研究了 Na Cl,KCl,Na OH,KOH,十二烷基硫酸钠 ( SDS)水溶液以及 SDS与 Na Cl混合水溶液对LPDEA热转变温度的影响和对 CPDEA溶胀比的影响 .结果表明 Na Cl,KCl,Na OH,KOH的加入会导致LPDEA热转变温度降低和 CPDEA溶胀比减少 ,其中起主导作用的是阴离子 ,而且氢氧根离子比氯离子的影响更显著 ;SDS的加入使得 LPDEA的热转变温度升高 ;同时加入 SDS和 Na Cl后 ,Na Cl和 SDS浓度比在某一特定范围时 ,LPDEA的热转变温度和 CPDEA的溶胀比变化较小 ,若该浓度比大于该范围时 ,Na Cl的影响较显著 ,反之 SDS的影响则较显著 .Linear poly(N,N-diethylacrylamide)(LPDEA) and cross-linked poly(N,N-diethylacrylamide)(CPDEA) were synthesized by radical polymerization. The thermally induced phase transition temperature of LPDEA and swelling ratio of CPDEA in the presence of additives were studied. Our results showed that the addition of NaCl,KCl,NaOH,KOH to the polymer solution resulted in the decrease of the phase transition temperature of LPDEA and the swelling ratio of CPDEA. The anions of the additives predominate over the cations of those in the effect, and the effect of OH- appears stronger than that of Cl-. The addition of sodium dodecyl sulfate(SDS) to the polymer solution, on the contrary, resulted in the increase of phase transition temperature of LPDEA. When SDS and NaCl were added to the polymer solution at the same time, their effects are counteractive, and there exists a range for the concentration ratios of SDS to NaCl within which the phase transition temperature of LPDEA and swelling ratio of CPDEA are only slightly affected by the additives.

关 键 词：聚N N—二乙基丙烯酰胺 温度敏感性 添加剂 溶胀比 热转变温度 水凝胶 

分 类 号：O633.22[理学—高分子化学]