作者: Chin-Ping Yang , Ruei-Shin Chen , Mao-Feng Hsu
关键词: Materials science 、 Solubility 、 Polymer chemistry 、 Thermal stability 、 Polymer 、 Organic chemistry 、 Monomer 、 Intermolecular force 、 Polyimide
摘要: 1,1-Bis[4-(4-aminophenoxy)phenyl]-1-phenylethane (BAPPE) is a useful monomer for preparing soluble polyimides, but polyimide synthesized from BAPPE and 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) shows poor solubility. Insoluble BTDA/BAPPE can copolymerize with polyimides at certain molar ratios (m2/m1) to produce arbitrarily copolyimides. To prepare copolyimides, the smallest m2/m1 ratio changes due matching dianhydrides, depending on structure of component. When polymers contain same ratio, copolyimides formed through thermal imidization show poorer solubility than these chemical imidization, copolyimide cyclized 250 °C has better that 300 °C; this formation intermolecular linkages during high-temperature cyclization. Additional, are characterized by good mechanical properties together stability, comparative study homopolyimide also presented.