A hyper branched 10-butylphenothiazine with in-situ thermally curable methacrylate (1,3,5-tris-[$\$10-Butyl-3-(4-(2-methyl-acryloyloxy)-phenyl)-7-yl-10H-phenothiazine$\}$]-benzene, (tris-PTMA)) was synthesized successfully. From the TGA thermogram of tris-PTMA was thermally stable up to $336^\circ}C$. In the first heating scan of DSC thermogram, tris-PTMA showed glass transition temperature (Tg) at $140^\circ}C$ and broad endothermic process in the region of $144-179^\circ}C$, which is thermally curing temperature. In the second heating process, $T_g$ exhibited at $158.7^\circ}C$ and endothermic process was not observed. Thermally cured tris-PTMA showed no big change in the UV-visible spectrum after washing with organic solvent such as methylene chloride, chloroform, toluene, indicating that thermally cured film was very good solvent resistance. Thermally cured tris-PTMA was electrochemically stable and the HOMO energy level of tris-PTMA was -5.54 eV. The maximum luminance efficiency of double layer structured polymer light-emitting diode based on in-situ thermally cured tris-PTMA was 0.685 cd/A at 16.0 V, which was higher than that of the device without thermally cured tris-PTMA (0.348 cd/A at 15.0 V).
成功合成了一种具内在热固化
甲基丙烯酸酯的超支化10-丁基苯
噻嗪(1,3,5-tris-[10-丁基-3-(4-(2-甲基-
丙烯酸酯)-苯基)-7-氮-10H-苯
噻嗪]-苯,简称tris-
PTMA)。从tris-
PTMA的热重分析(TGA)热图上可以看出,其热稳定性高达336°C。在差示扫描量热(
DSC)热图的第一次加热扫描中,tris-
PTMA表现出
玻璃转变温度(Tg)为140°C,并在144-179°C区域出现宽的吸热过程,这是其热固化温度。在第二次加热过程中,Tg显示为158.7°C,并未观察到吸热过程。热固化后的tris-
PTMA在用有机溶剂(如
二氯甲烷、
氯仿、
甲苯)洗涤后,紫外-可见光谱未见显著变化,这表明热固化膜具有良好的溶剂抗性。热固化后的tris-
PTMA具有电
化学稳定性,其HOMO能级为-5.54eV。基于原位热固化tris-
PTMA的双层结构聚合物发光二极管的最高亮度效率为0.685 cd/A(在16.0 V下),高于未热固化tris-
PTMA设备的效率(0.348 cd/A在15.0 V下)。