Abstract
The research covers rheological characteristics of melts of polysulfones of domestic brand PSF-190 and foreign brand Udel P-1700 at temperatures ranging from 290 to 360°C. The values of activation energy of viscous flow of polysulfone melts at different temperatures are presented. The flow behavior indexes of melts of polysulfones PSF-190 and Udel P-1700 were determined. For the first time thermal stability curves over a wide temperature range were obtained, and formulas for describing them were presented. Temperature modes for processing the studied polysulfones were suggested. The dependency of density and volume in the temperature range from 23 to 320°C were obtained by the dilatometric method. Besides, constants and coefficients of the state equation of linear thermal expansion were calculated.
Highlights
The research covers rheological characteristics of melts of polysulfones of domestic brand PSF190 and foreign brand Udel P-1700 at temperatures ranging from 290 to 360°C
For the first time thermal stability curves over a wide temperature range were obtained, and formulas for describing them were presented
The dependency of density and volume in the temperature range from 23 to 320°C were obtained by the dilatometric method
Summary
Исследованы реологические характеристики расплава полисульфонов отечественной марки ПСФ-190 и зарубежной Udel Р-1700 в температурном интервале от 290 до 360оС. Представлены значения энергия активации вязкого течения для расплавов полисульфонов при различных температурах. Определен показатель текучести расплава для ПСФ марки ПСФ-190 и Udel Р1700. Впервые получены полные кривые термостабильности в широком диапазоне температур и представлены формулы для их описания. Предложены температурные режимы переработки исследованных полисульфонов для отечественной и зарубежной марки. Дилатометрическим методом получены зависимости удельного объема и плотности в интервале температур от 23 до 320°С, по полученным данным были рассчитаны константы удельного объема и внутреннего давления уравнения состояния и температура стеклования.
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