农用塑料薄膜光质辐射透过性能

Radiation transmittance performance in light quality of the agricultural plastic films

为了分析和了解农用塑料薄膜的光辐射透过性能,该文采用VARIAN Cary-50紫外/可见光光度计和岛津FT-IR8700远红外光谱仪,分别扫描分析材料,得到针对不同光质波段的透过率,结果表明:①紫外区段,聚氯乙烯(PVC)通透能力最低,聚乙烯(PE)较高,乙烯-醋酸乙烯共聚物(EVA)次之;②PAR区段中,该文根据扫描结果分析计算各波段的透过面积比发现,PVC在蓝光区较为充沛,PE在黄绿光区最为丰富,红光和远红光通过计算R/FR值得出,新膜R/FR值较一致,但是百天后PVC膜下降幅度最大达到0.076,PE和EVA下降值都在0.050。③远红外光区PVC膜拥有优异的阻隔能力,PE次之,EVA较差。

In order to understand the radiation transmittance performance of agricultural plastic films,the plastic films were scanned using VARIAN Cary-50 Ultraviolet/visible photometer and FT-IR 8700 Far infrared spectrometer (Shimadzu)in this paper.At the same time,the UV,PAR and Infrared(IR)ray radiation transmittance spectrums were analyzed.The results showed:①the transmittance in UV part,PVC was the lowest,EVA was next,and PE was much higher.②in PAR part,the transmittance area ratio was calculated based on the s...