POLYMER SHEETS WITH A THIN NANOCOMPOSITE LAYER ACTING AS A UV FILTER

Citation
T. Kyprianidouleodidou et al., POLYMER SHEETS WITH A THIN NANOCOMPOSITE LAYER ACTING AS A UV FILTER, Polymers for advanced technologies, 8(8), 1997, pp. 505-512
Citations number
37
Categorie Soggetti
Polymer Sciences
ISSN journal
10427147
Volume
8
Issue
8
Year of publication
1997
Pages
505 - 512
Database
ISI
SICI code
1042-7147(1997)8:8<505:PSWATN>2.0.ZU;2-7
Abstract
A surface layer (thickness 1-10 mu m) containing colloidal TiO2 or ZnO particles was prepared in EVA (a copolymer of ethylene and vinyl acet ate). The inorganic particles were formed in situ by hydrolysis of inc orporated titanium tetrachloride or diethyl zinc. The resulting materi als were analyzed with UV spectroscopy, electron microscopy, X-ray dif fraction, thermogravimetric analysis and atomic emission spectroscopy. The average diameter of the embedded TiO2 particles was 70 nm; these particles absorb UV radiation but also induce opacity in the polymer s heets in the visible wavelengths range. The ZnO particles were smaller (average diameter 15 nm); with a surface layer of embedded ZnO, trans parent polymer sheets can be obtained that absorb UV radiation. (C) 19 97 by John Wiley & Sons, Ltd.