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Citation:
YU Yunchao, LI Yiming. EPOXY RESINS TOUGHENED WITH CARBOXYL TERMINATED POLYETHERS[J]. Chinese Journal of Polymer Science,
;1983, 1(2): 176-182.
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Carboxyl terminated polyethers, the adducts of hydroxyl terminated polytetrahydrofuran and maleic anhydride, were used as toughener for epoxy resins. The morphology of the toughened resins was investigated by means of turbidity measurement, dynamic mechanical testing and scanning electron microscope observation. It turned out that the molecular weight and the carboxyl content of the polyether and the cure conditions are important factors, which affect the particle size of the polyether-rich domains and, in turn,the mechanical properties of the cured resin.Carboxyl terminated polytetrahydrofurans have a low glass transition temperature,and in appropriate amount they do not affect the thermal resistance of the resin.These advantages make them preferable as toughener for epoxy resins.
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