Modification of colloidal silica on the mechanical properties of acrylic based polyurethane/silica composites

作者：Chen Guodong; Zhou Shuxue; Gu Guangxin; Wu Limin^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2007, 296(1-3): 29-36.

DOI：10.1016/j.colsurfa.2006.09.016

• colloidal silica
• interfacial interaction
• polyurethane coats

The colloidal silica particles were first modified with methyltriethoxylsilane and methacryloxypropyltrimethoxysilane, respectively, then embedded into acrylic based polyurethane using blending method or in situ method. The effects of the silane couple agent type, modified silica content and preparation method on the redispersibility of silica particles and mechanical properties of polyurethane coats were investigated using (29)si NMR, TGA, FT-IR, particle size analyzer, SEM, DMA and Instron machine. It was found that different silane couple agent and preparation method had obvious influences on the redispersibility and mechanical properties.

• 出版日期2007-3-15
• 单位复旦大学