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- W1999115124 abstract "Based on aminocarboxylic acids, trimellitic anydride acid chloride and various diamines, polyamidoamides were prepared by direct polycondensation in presence of triphenyl phosphite and a tertiary amine. The dependence of the molecular mass of the polyamic acid on solution concentration, process temperature and amount of catalyst was studied, also the stress-strain thermal properties of the polyamidoimides. It was shown that with an imide: amide group ratio of 3 : 1, the thermal stabilities of the polyamidoimides were increased. The anomalous behaviour of the 1780 and 745 cm−1 imide bands and those at 800–900 and 1100 cm−1 during heating was explained by the formation of a mesomorphic structure, detected by an X-ray method." @default.
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- W1999115124 date "1987-01-01" @default.
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- W1999115124 title "The synthesis of polyamidoimides by direct polycondensation" @default.
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- W1999115124 doi "https://doi.org/10.1016/0032-3950(87)90012-8" @default.
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