Rosin-Nanosilica Hybrid Materials: Preparation and Properties

Focus of this research is the synthesis of novel organic-inorganic hybrid materials based on functionalized natural products, such as polymerizable rosin derivatives and nanosilicas modified as gamma-methacryloxy propyl trimethoxy silane (MATS). Rosin based hybrids obtained by an in situ UV curing method and their characteristics interactions between organic and inorganic were investigated. The results showed that MATS-silica was homogeneously dispersed within acrylic acid rosin (ARA)/2-hydroxyethyl acrylate (HEA) matrix. The combination of ARA/HEA and nanosilicas results in improved performances, pencil hardness and cross linking over the ARA/HEA matrix. Gel content increased from 92.3% to 95.4%. Glass transition and thermal gravimetric temperature of ARA/HEA-nanosilicas hybrid coatings were increased compared with cured ARA/HEA coating. The pencil hardness (H) was also improved from 2 H to 3 H, adhesion stayed in 1 grade and chemical resistance together passed the GB/T 1763-1989.