Comprehensive Evaluation Method and Full Cycle Prediction of Aging Performance of Polymer Materials

Abstract Polymer materials are increasingly used in the automotive field, and it is of great significance to study the aging characteristics of polymer materials. However, the cost of comprehensive aging of polymer materials is high and does not have universal properties, while the key models predicted by polymer materials comprehensive aging indicators are rarely studied.This article uses 25 day sunlight simulation test data of two plastics, PP and ASA, based on the analysis of plastic sheet aging behavior and the mechanism of environmental effects on PP and ASA plastics, Explore the correlation between the aging properties of PP and ASA plastics. Through principal component analysis and approximate ideal solution ranking, several aging indexes are reduced into comprehensive aging values, and the aging resistance of PP and ASA plastics is compared. By using the least square method, the aging curves of PP and ASA plastics with different properties under different sunlight simulation durations were predicted, and the aging values of PP and ASA plastics on the 30th day were compared with the measured values. The results show that the hardness, tensile strength, and bending strength have high repeatability. The aging performance of ASA plastic calculated by the TOPSIS method is better than that of PP plastic. The predicted aging values of PP and ASA plastics on the 30th day are within 2% of the measured values, which greatly saves testing cost.