Polymeric Mesoions: Novel Synthetic Methods, Photochemistry, and Characterization in the Solid State by Dielectric and Waveguide-Mode Spectroscopy
作者:Alexander Theis、Bernhard Menges、Silvia Mittler、Michal Mierzwa、Tadeusz Pakula、Helmut Ritter
DOI:10.1021/ma0347013
日期:2003.10.1
compared to those of liquid-crystalline mesoionic copolymers. The influence on the dielectric properties upon irradiation with UV light, which causes the photoconversion of the mesoionic groups to bis(β-lactame) structures, was determined. The glass-transition temperatures determined by dielectric spectroscopy were compared to those obtained by DSC. It could be observed by waveguide-mode spectroscopy that
制备并表征其中将可聚合的甲基丙烯酸基团连接至中离子功能的丙二酸组分上的光敏中离子聚合物。进行介电测量,并将结果与液晶中离子共聚物的结果进行比较。确定了紫外线辐射对介电性能的影响,该影响导致中离子基团向双(β-内酰胺)结构的光转化。将通过介电光谱法测定的玻璃化转变温度与通过DSC获得的玻璃化转变温度进行比较。可以通过波导模式光谱观察到,辐照中离子甲基丙烯酸酯对旋涂的聚合物膜的膜厚度和折射率产生显着影响。