The effects of long and bulky aromatic pendent groups with flexible linkages on the thermal, mechanical and electrical properties of the polyimides and their nanocomposites with functionalized silica
作者:Simi Annie Tharakan、Sarojadevi Muthusamy
DOI:10.1039/d0ra08561h
日期:——
novel diamine bis(4-aminophenyl)bis3,4[(4-(8-quinolyloxymethyl carbonyl)]}methane, containing two long/bulky aromatic pendent chains was synthesized by incorporating aromatic and hetero aromatic groups with flexible linkages. Flexible, stretchable, thermally stable and processable polyimides were prepared by reacting this newly synthesized diamine with commercial tetracarboxylic acid dianhydrides like
通过结合具有柔性连接的芳族和杂芳族基团,合成了一种新型二胺双(4-氨基苯基)双3,4[(4-(8-喹啉氧基甲基羰基)]}甲烷,包含两个长/大的芳族侧链。通过将这种新合成的二胺与商业四羧酸二酐(如 3,3',4,4'-二苯甲酮四羧酸二酐 (BTDA) 和 4,4'-(4,4 '-异亚丙基二苯氧基)二邻苯二甲酸酐(BPADA)。以芳香胺功能化二氧化硅为填料,通过溶液浇铸法制备了聚酰亚胺纳米复合材料。目前的工作研究了结合长/大的芳香侧链和柔性键对热、机械性能的影响。聚酰亚胺和纳米复合材料的电学和光学性能。聚酰亚胺表现出良好的热稳定性(T 10% = 364 & 388)、高阻燃性、低玻璃化转变温度(T g = 130 °C & 156 °C)、非常低介电常数(1 MHz 时为 2.5 和 2.8)和良好的光学透明度。纯聚酰亚胺显示出良好的断裂伸长率(133-155%),但拉伸强度较低。化学酰亚