Prediction method of hygrothermal aging behavior of the polyester resin

摘要

PROBLEM TO BE SOLVED: To provide a method of predicting the hygrothermal aging behaviors of a polyester resin, with which the hygrothermal aging behaviors of the polyester resin can be easily and accurately predicted.;SOLUTION: The method of predicting the hygrothermal aging behaviors of the polyester resin includes steps of: (1) determining a hydrolysis reaction rate constant k_o of the polyester resin under standard conditions; (2) determining a hydrolysis reaction rate constant kt_m in the case that temperature conditions change from the standard conditions to create a calibration curve 1 of a temperature coefficient Ct (kt_m/k_o); (3) determining a hydrolysis reaction rate constant kh_n in the case that relative humidity conditions change from the standard conditions to create a calibration line 2 of a humidity coefficient Ch (kh_n/k_o); (4) reading the temperature coefficient Ct_x and the humidity coefficient Ch_x for the conditions with which the hygrothermal aging behaviors should be predicted, respectively from the calibration line 1 and the calibration line 2; (5) reading the temperature coefficient Ct_y and the humidity coefficient Ch_y in the standard conditions, respectively from the calibration line 1 and the calibration line 2; and (6) multiplying the exposure time of data regarding relation between an exposure time and specific physical properties measured in the standard conditions by (Ct_y×Ch_y)/(Ct_x×Ch_x) to obtain data for predicting hygrothermal aging.;COPYRIGHT: (C)2011,JPO&INPIT