title: [Preparation of EVOH film and infrared spectroscopic study of its heat preservation property].
abstract: EVOH, PE and EVA films were prepared by extrusive blowing techniques, the optic capability, transmittance, haze, infrared anti-transmittance and heat preservation of the films were studied by IR spectroscopy and optic block. The result indicated that the haze degree of the EVOH film decreased about 10% and 5% compared to PE film and EVA film respectively, EVOH film's transmission of IR is much less than other films in the 2.5-25 microm wavelength range, it is just 9.03% in 7-14 microm wavelength range, and about 27% less than EVA film, while much less than PE film. It was found that EVOH film has much better capability of infrared anti-transmittance and point-blank light transmission than other two kinds of films. It was good for calefaction and heat preservation of greenhouse.
authors.affiliation: Chemistry Department, School of Science, Beijing Institute of Technology, Beijing 100081, China. cuihailong1976@sina.com
authors.forename: Hai-Long
authors.initials: HL
authors.lastname: Cui
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Wang
authors.forename: Hong-Wen
authors.initials: HW
authors.lastname: Jiao
authors.forename: Shi-Xiang
authors.initials: SX
authors.lastname: Lu
authors.forename: Wen-Guo
authors.initials: WG
authors.lastname: Xu