Cui Hai-long, Xu Wen-guo, He Fu-qing, Wang Zhao-hui, Jiao Hong-wen, Lu Shi-xiang
Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2012 Jan;32(1):96-8.
Polyvinyl alcohol (PVA), polyethylene (PE) and ethylene-vinyl acetate copolymer (EVA) film was prepared. The optic capability, infrared transmittance and heat preservation capability of the films were studied respectively. The result indicated that the haze degree of the PVA film decreased about 15% and 12% than PE film and EVA film; PVA film transmittance of IR was more or less than other films in the 7-14 microm wavelength range so that the temperature of greenhouse could be increased effectively in daylight. It was just 16.2% about 20% less than EVA film, and 50% less than PE film. The PVA film could be used as agricultural film in greenhouse to promote heat preservation performance greatly.
制备了聚乙烯醇（PVA）、聚乙烯（PE）和乙烯-醋酸乙烯酯共聚物（EVA）薄膜。分别研究了这些薄膜的光学性能、红外透过率和保温性能。结果表明，PVA薄膜的雾度比PE薄膜和EVA薄膜分别降低了约15%和12%；在7-14微米波长范围内，PVA薄膜的红外透过率与其他薄膜相近，因此在白天能有效提高温室温度。其红外透过率仅为16.2%，比EVA薄膜低约20%，比PE薄膜低50%。PVA薄膜可作为温室农用薄膜，大大提高保温性能。
