聚酰胺光伏背板老化性能及机理研究

分别研究了在湿热老化、加速湿热老化、紫外辐照老化模式下,背板的力学性能和聚酰胺熔融焓及黄度指数的变化,分析了老化前后背板的断面形貌和表面形貌变化。结果表明:湿热老化和加速湿热老化聚酰胺趋于结晶以及聚酰胺和玻璃纤维界面作用减弱;紫外辐射老化主要导致酰胺键断开,分子结构破坏。通过比较老化前后力学性能、黄度指数及表面形貌发现,紫外辐照老化对聚酰胺背板的影响较大。

Study on Aging Properties of Polyamide Photovoltaic Backsheet

The effect of damp heat ageing, accelerated damp heat ageing and UV irradiation ageing on mechanical properties,melting enthalpy and yellow index of polyamide photovoltaic backsheet was studied. The fracture and surface characteristic of backsheet was analyzed by scanning electron microscope. The results indicate that polyamide go crystallizing and the interaction between glass fiber and polyamide go weaking in precess of damp heat ageing and accelerated damp heat ageing. In precess of UV irradiation ageing, molecular structure of polyamide was destroyed. By comparing the mechanical properties,yellow index and surface characteristic, we found that UV irradiation ageing gave greater influence to polyamide PV backsheet.