Abstract
It is known that for decrease in viscosity polymeric binding on the basis of epoxy oligomers in their composition injecting solvents of the different nature and thermodynamic compatibility. In this paper the dependences describing influence on shrinkage, kinetics of increase and maximum level of strains from diluents content and temperature of curing of epoxy oligomers are established. Introduction about 20 % of the active diluents (DEG-1 and SO-3) in system on the basis of epoxy oligomers leads to decrease in viscosity in ~3 times, to improvement of imbibition quality of fibrous fillers, increase of volume contraction (on ~2.5. %) and decrease in residual stresses in ~6 times as a result of increase of mobility of pieces of a polymeric chain in a three-dimensional grid, and also to decrease in glass transition temperature no more than ~20°C.
Highlights
It is known that for decrease in viscosity polymeric binding on the basis of epoxy oligomers in their composition injecting solvents of the different nature and thermodynamic compatibility
Introduction about 20 % of the active diluents (DEG-1 and SO-3) in system on the basis of epoxy oligomers leads to decrease in viscosity in ~3 times, to improvement of imbibition quality of fibrous fillers, increase of volume contraction and decrease in residual stresses in ~6 times as a result of increase of mobility of pieces of a polymeric chain in a three-dimensional grid, and to decrease in glass transition temperature no more than ~20°C
Скорость нарастания и величины конечной усадки (Ук) для всех исследованных систем с введением активных разбавителей ДЭГ-1 и СО-3 возрастают на 15–30% по сравнению с исходной ЭД-20
Summary
It is known that for decrease in viscosity polymeric binding on the basis of epoxy oligomers in their composition injecting solvents of the different nature and thermodynamic compatibility. В работе [2] приведены данные о влиянии на уровень и кинетику роста остаточных напряжений молекулярных характеристик, начальной и вторичной гетерогенности, а также конверсии функциональных групп и кинетики усадки при отверждении эпоксидиановых олигомеров (ЭДО). Для исследования влияния разбавителей на кинетику изменения объемных усадок и напряжений при отверждении целесообразно использовать ЭДО с ММср не менее 400- 450 г/моль, характеризующийся наибольшей стабильностью свойств.
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