| Autor: |
Jinna Lin, Xingrong Zeng, Youjun Hou |
| Předmět: |
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| Zdroj: |
Polymer-Plastics Technology & Engineering; Dec2008, Vol. 47 Issue 12, p1297-1301, 5p, 2 Diagrams, 2 Charts, 3 Graphs |
| Abstrakt: |
Ultraviolet (UV)-curable DDS-MPTMS/SiO2 hybrid coating was prepared by sol-gel process from tetraethylorthosilicate (TEOS), dimethyl diethylorthosilicate (DDS), and methacrylate propyl trimethoxysilicate (MPTMS). The formation of inorganic-organic hybrid network was studied by FT-IR and 29Si-NMR during UV curing. It was found that the three-dimensional (3D) inorganic networks were formed mainly by condensation of TEOS, and the linear Si-O-Si bonds were also formed by condensation of DDS. The organic networks were formed by the polymerization of C=C bonds in methacrylate units and the silanol groups were further condensed when the hybrid coating was cured by UV light. The steric hindrance of organic-inorganic hybrid networks resulted in incomplete polymerization and condensation. When the UV curing time was 240 s, the conversion degree of C=C bonds was 81.0% and the condensation degree of silanol groups in TEOS and MPTMS was 81.8% and 91.5%, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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