向PA66GF25尼龙隔热条材料中分别加入三种抗氧剂体系,通过测定样品热氧老化实验后的拉伸强度值,研究不同抗氧剂体系对PA66GF25尼龙隔热条材料耐老化性能的稳定作用.结果表明,三种抗氧体系均提高了材料的耐老化性能,尤其是含有碳自由基捕获剂的三元复配体系.同时,对尼龙隔热条材料的静态使用寿命进行了分析与预测:不含抗氧剂的材料静态使用寿命仅为4.34 a,含三元复配抗氧体系的材料则可高达57.05 a.%Three kinds of antioxidant were added in each nylon heat insulation strip materials (PA66-GF25) individually; the effect of antioxidant was characterized by change of tensile strength of nylon heat insulation strips after aging. The results indicated that all of the antioxidant prolongs the aging time of the materials; the best is ternary compound which contains C-centered radical scavengers. Besides this, the static service life of nylon heat-insulation strip material is also predicted through theory of computation; the materials without antioxidant can be used only about 4.34 years, while the materials with ternary compound have service life of 57.05 years.
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