Research Progress in Heat and Humidity Resistance Aging of Halogen-free Flame-retardant Reinforced PBT
Under high temperature and high humidity conditions,the PBT resin will have a serious hydrolysis reaction with molecular chain break decomposition in the traditional halogen-free flame-retardant reinforced system for the acidic halogen-free flame retardants.The mechanical properties such as tensile strength,flexural strength and izod notched impact strength of the material are aging fast,which affects the performance stability of the product and hinders the use of the practical application scenario of heat-dampness aging.In this work,the PBT halogen-free flame-retardant system is optimized.Anti-hydrolysis agent and anti-hydrolysis glass fiber are used to improve the moisture and heat resistance of materials,and the amount of halogen-free flame retardant is regulated to reduce the hydrolysis reaction.The synergistic effect of the two strategies greatly improves the moisture and heat aging resistance of halogen-free flame-retardant reinforced PBT.Tensile strength retention rate increased from 58.1%to 86.3%,flexural strength retention rate increased from 66.8%to 84.4%,izod notched impact strength retention rate increased from 57.1%to 74.2%.
heat and humidity aginghalogen-free flame-retardantdouble 85 condition
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