复合材料型材在紫外-凝露和自然环境下老化机制
发布时间：2018-11-29 13:17
【摘要】：对拉挤成型的玻璃纤维增强复合材料进行自然暴露老化和紫外凝露加速老化试验,研究了不饱和聚酯基型材和乙烯基酯树脂型材在2种环境下的质量、外观颜色、微观形态以及拉伸性能随老化时间的变化,并用红外光谱分析了材料结构的变化。结果表明:在紫外-凝露环境下,复合材料表面颜色变黄,损伤产生于材料表面树脂;老化1 a后,不饱和聚酯基型材和乙烯基酯树脂型材质量分别下降0.73%和0.76%,拉伸模量分别下降18.85%和38.57%,而对不饱和聚酯基型材的拉伸强度无明显副作用,乙烯基酯树脂型材强度下降为78.54%。在自然环境老化1 a后,型材性能变化趋势与紫外-凝露环境下一致,但是变化量较少。
[Abstract]:The natural exposure aging and ultraviolet condensation accelerated aging tests of glass fiber reinforced composites formed by pullout were carried out. The quality and appearance color of unsaturated polyester and vinyl ester resin profiles in two environments were studied. The changes of microstructure and tensile properties with aging time were analyzed by infrared spectroscopy. The results show that the surface color of the composite is yellowish and the damage is caused by the resin on the surface of the composite in the UV-condensed environment. After aging for 1 year, the quality of unsaturated polyester based profile and vinyl ester resin profile decreased by 0.73% and 0.76%, respectively, and the tensile modulus decreased by 18.85% and 38.57%, respectively. However, the tensile strength of unsaturated polyester based profile was decreased to 78.54, and the tensile strength of vinyl ester resin profile was decreased to 78.54. After aging in natural environment for 1 year, the change trend of profile properties is the same as that in UV-condensed environment, but the change is less.
【作者单位】： 南京工业大学土木工程学院;
【基金】：国家自然科学基金(51030010,51408304) 江苏省自然科学基金青年科学基金(BK20140947)
【分类号】：TB332
，
本文编号：2365095
[Abstract]:The natural exposure aging and ultraviolet condensation accelerated aging tests of glass fiber reinforced composites formed by pullout were carried out. The quality and appearance color of unsaturated polyester and vinyl ester resin profiles in two environments were studied. The changes of microstructure and tensile properties with aging time were analyzed by infrared spectroscopy. The results show that the surface color of the composite is yellowish and the damage is caused by the resin on the surface of the composite in the UV-condensed environment. After aging for 1 year, the quality of unsaturated polyester based profile and vinyl ester resin profile decreased by 0.73% and 0.76%, respectively, and the tensile modulus decreased by 18.85% and 38.57%, respectively. However, the tensile strength of unsaturated polyester based profile was decreased to 78.54, and the tensile strength of vinyl ester resin profile was decreased to 78.54. After aging in natural environment for 1 year, the change trend of profile properties is the same as that in UV-condensed environment, but the change is less.
【作者单位】： 南京工业大学土木工程学院;
【基金】：国家自然科学基金(51030010,51408304) 江苏省自然科学基金青年科学基金(BK20140947)
【分类号】：TB332
，
本文编号：2365095
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