Effect of Isomerism on Molecular Packing and Gas Transport Properties of Poly(benzoxazole-co-imide)s
作者： Yongbing Zhuang , Jong Geun Seong , Yu Seong Do , Hye Jin Jo , Moon Joo Lee
DOI: 10.1021/MA501891M
关键词: Ultimate tensile strength 、 Condensation polymer 、 Imide 、 Elongation 、 Benzoxazole 、 Thermal stability 、 Materials science 、 Polymer chemistry 、 Diamine 、 Glass transition
摘要: A facile approach to synthesize poly(benzoxazole-co-imide)s without thermal rearrangement at high temperature is proposed. Poly(benzoxazole-co-imide)s with improved mechanical and solution-processable properties were prepared through polycondensation of 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) three synthesized novel benzoxazole-containing diamines a commercial diamine. These had tensile strengths 110.3–122.0 MPa good elongation break 11.9–26.3%, stability glass transition temperatures (Tgs) up 306 °C. The effect chain isomerism on molecular packing physical gas transport the was investigated. para-connecting isomers exhibited higher weights (Mws), better properties, Tgs, order overall performance for CO2/CH4 CO2/N2 separations as compared corresponding meta-connecting ones. This st...
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