EVAC/ADP/MPP复合材料的抗老化性能

在乙烯–乙酸乙烯共聚物(EVAC)/二乙基次膦酸铝(ADP)/三聚氰胺聚磷酸盐(MPP)复合材料中加入紫外线吸收剂UV–531和抗氧剂1010,并对其进行老化性能研究,主要研究了"双85"湿热老化以及紫外老化对其力学性能以及热稳定性的影响。研究结果表明,经过"双85"湿热老化后,EVAC/ADP/MPP复合材料的拉伸强度和断裂伸长率都呈现出先上升后下降的趋势。经过紫外老化试验的EVAC/ADP/MPP复合材料的拉伸强度和断裂伸长率却都呈现出不断下降的趋势。通过红外光谱研究发现,EVAC/ADP/MPP在"双85"湿热老化试验时老化降解在乙烯和乙酸乙烯链段同时进行,而在紫外老化试验中老化降解主要发生在乙烯链段;热失重以及差示扫描量热分析发现,经过长时间的湿热以及紫外老化试验之后EVAC/ADP/MPP复合材料的热稳定性变差、残炭量变少。

Anti-Aging Properties of EVAC/ADP / MPP Composite

The anti-aging properties of ethylene vinyl acetate(EVAC) / aluminum diethylphosphinate(ADP) / melamine phosphate(MPP) composites by adding ultraviolet absorber UV-531 and antioxidant1010 were studied.The mechanical properties and thermal stability of EVAC / ADP / MPP composite by the double price hygrothermal aging and ultraviolet aging were mainly studied.The results show that EVAC/ADP/MPP composites' tensile strength and elongation at break are first increased and then decreased after hygrothermal aging.After ultraviolet aging test,EVAC composites' tensile strength and elongation at break are showing a declining trend.EVAC/ADP/MPP composites' degradation happen in the chain of ethylene and vinyl acetate ethylene at the same time after hygrothermal aging through infrared spectrum study.By ultraviolet aging,the degradation of EVAC/ADP /MPP composites mainly occurr in the ethylene chain segment.Thermogravimetry and differential scanning calorimeter test show that after long time of hygrothermal aging and ultraviolet aging test,EVAC/ADP/MPP composites' thermal stability decrease and residual carbon quantity lost is less.