Ternary interpenetrating networks of polyurethane-poly(methyl methacrylate)-silica: Preparation by the sol-gel process and characterization of films

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作者
Bonilla, Gabriela [1 ]
Martínez, Martina [2 ]
Mendoza, Ana María [2 ]
Widmaier, Jean-Michel [1 ]
机构
[1] Institut Charles Sadron, CNRS-UPR 0022, 6, rue Boussingault, 67083 Strasbourg, France
[2] Instituto Tecnológico de Ciudad Madero, Ave 1 Mayo Sor Juana I. la Cruz, Ciudad Madero, Tamaulipas 89440, Mexico
来源
European Polymer Journal | 2006年 / 42卷 / 11期
关键词
Novel organic/inorganic interpenetrating networks composed of polyurethane (PU); poly(methyl methacrylate) (PMMA) and silica generated from tetraethoxysilane (TEOS); were prepared by in situ bulk polymerization. Optically transparent films were successfully synthesized using 3-(trimethoxysilyl)propyl methacrylate (TMSPM) and isocyanatopropyl triethoxysilane (IPTES) as dual coupling agents. An experimental protocol was established to minimize undesirable side-reactions. According to infrared spectroscopic analysis and thermogravimetric studies of the hybrid materials; the degree of silica condensation was unfavorably affected by the presence of the organic components. Consequently; storage modulus (E′) at 25 °C; and hardness of the films decreased with increasing silica content. © 2006 Elsevier Ltd. All rights reserved;
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页码:2977 / 2986
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