水上光伏系统用高密度聚乙烯(HDPE)的紫外光氧老化性能研究
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摘要
在紫外光氧环境中对水上光伏系统用高密度聚乙烯(HDPE)进行了7500h的人工加速老化试验,以研究其在紫外光氧老化环境下的老化行为及规律。通过力学性能测试试验、凝胶渗透色谱分析(GPC)和差示扫描量热法(DSC)分别研究了高密度聚乙烯(HDPE)在紫外光氧老化环境中性能和结构的变化。结果表明:随着老化时间的增加,HDPE的拉伸屈服应力和拉伸断裂应力变化不大,断裂标称应变呈现先不变后下降的趋势;HDPE的熔点和结晶度变化不大。
In this paper,with HDPE of water photovoltaic systems as the research object,7500 hours UV photo-oxidation aging test was operated for HDPE by using the method of artificially accelerated aging test. The aging behavior and law of HDPE were studied after UV photo-oxidation test. The mechanical performance test,GPC and DSC were used to study the performance and structure changes of high density polyethylene(HDPE) in photo-oxidative aging environment. The results showed that the tensile stress at yield and tensile stress at break of HDPE didn't change a lot and the nominal strain at break showed a trend of first change and then decrease with the increase of aging time.The melting point and crystallinity had a little change with the increase of aging time.
In this paper,with HDPE of water photovoltaic systems as the research object,7500 hours UV photo-oxidation aging test was operated for HDPE by using the method of artificially accelerated aging test. The aging behavior and law of HDPE were studied after UV photo-oxidation test. The mechanical performance test,GPC and DSC were used to study the performance and structure changes of high density polyethylene(HDPE) in photo-oxidative aging environment. The results showed that the tensile stress at yield and tensile stress at break of HDPE didn't change a lot and the nominal strain at break showed a trend of first change and then decrease with the increase of aging time.The melting point and crystallinity had a little change with the increase of aging time.
引文
[1] 蒋秀亭,杨旭东,童军. 高密度聚乙烯土工格栅光氧老化研究进展[J]. 合成材料老化与应用,2015(1):82-87.
[2] 张敏. 高密度聚乙烯(HDPE)膜材料光氧老化性能研究[D].上海:东华大学,2017.
[3] 王俊,彭坚. HDPE 老化试验后的微观结构分析与机械性能对比[C].第三届中美材料环境腐蚀与老化试验学术研讨会,2004.
[4] 杨姮,吕亚栋,赵锦灿,等. 高密度聚乙烯在中国湿热和寒冷气候中的自然老化行为[J]. 高分子材料科学与工程,2016,32(5):69-74.
[5] 郭力. 高密度聚乙烯支链结构、结晶行为和力学性能的研究[D].大庆:东北石油大学,2017.
[2] 张敏. 高密度聚乙烯(HDPE)膜材料光氧老化性能研究[D].上海:东华大学,2017.
[3] 王俊,彭坚. HDPE 老化试验后的微观结构分析与机械性能对比[C].第三届中美材料环境腐蚀与老化试验学术研讨会,2004.
[4] 杨姮,吕亚栋,赵锦灿,等. 高密度聚乙烯在中国湿热和寒冷气候中的自然老化行为[J]. 高分子材料科学与工程,2016,32(5):69-74.
[5] 郭力. 高密度聚乙烯支链结构、结晶行为和力学性能的研究[D].大庆:东北石油大学,2017.