超支化聚(酰胺-酯)水溶液的特性粘数  

Inherent Viscosity of Hyperbranched Poly(amide-ester) Solution

作　　者：李艳[1] 王素娟[1] 李春子[1] 巴信武[1] 

机构地区：[1]河北大学化学与环境科学学院,保定071002

出　　处：《华东理工大学学报（自然科学版）》2006年第6期728-730,共3页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(20574016);河北省自然科学基金(B2004000093)

摘　　要：以丁二酸酐和二乙醇胺为原料,合成了一种超支化聚（酰胺-酯）,并研究了其水溶液的特性粘数（[η]）与温度的依赖关系.结果表明：[η]随温度升高有异常变化,在69.1～69.8℃,[η]明显降低,在此区间以外,则几乎不受温度影响.在此温度区间[η]突然降低,可能是由于体系中聚合物间和聚合物与水间因氢键形成的物理交联网络在高温下受到破坏而引起的,即体系发生了体积相变现象;DSC测试显示,用冰醋酸改性超支化端基减少端羟基数后,相变温度也相应从改性前的69.1℃降至53.2℃.实验证实上述现象并非由聚合物在水中的水解所造成的.The viscosity behavior of the hyperbranched poly （amide-ester） synthesized by succinic anhydride （AA＇） and diethanolamine （B＇B2）, was investigated in the aqueous solutions by Ubbelohde viscometer. The experimental results show that the intrinsic viscosity （[η]）are changed sharply at 69.1- 69.8 ℃. At the same temperature range, DSC technique is performed to give the endothermal apex, which was corresponded to the intrinsic viscosity number transition. It should be reliable to interpret the results as the interaction of intermolecular hydrogen-bond, which are broken with increasing the temperature. As decreasing the number of hydroxyl groups by the reaction of hyperbranched polymer with glacial acetic acid, the reducing of phase transformation temperature can be found in DSC spectrogram. This phenomenon is not caused by the hyperbranched polymer in aqeous solution, which can also be confirmed by the way of acid base titration.

关 键 词：超支化聚合物 特性粘度 氢键 

分 类 号：O631.4[理学—高分子化学]