Mechanism Study Of Gradient Materials Of Polysilicone-polyacrylate

To prepare the functionally gradient materials (FGM) of polysilane-polyacrylate, the method of solution preparation was performed. Based on the results of the back-scattered electron images and linear scanning of the polysilane-polyacrylate film's cross section, the dependence of polysilane-polyacrylate film's structure on molecules of poly[Y-[tris(trimethylsiloxysilyl)] propyl methacrylate] (PMTS) and polyacrylate (PMMA), P(MMA-co-PMTS) feed ratio were investigated. Then properties of the polysilane-polyacrylate gradient film were characterized. The mechanism of film forming process of polysilane-polyacrylate FGM was probed into as well.A improved synthetical method of Organosilicone monomer MTS with higher silicone content than raw monomer y-(trimethyloxysilyl) propyl methacrylate (KH-570) was raised. Afterwards, the solution polymerization of MTS, MMA, and P(MMA-co-PMTS) were carried out. The testing results indicated that adding P(MMA-co-PMTS) of different can improve the poor miscibility of PMMA and PMTS because P(MMA-co-PMTS) contained both PMMA chains and organosilicone chains which joint PMMA and PMTS as a bridge. The obtained polysilane-polyacrylate gradient films showed no macro-interface with the silicone content reducing gradually from the top surface to the bottom one.DMA thermograms indicated that polysilane-polyacrylate gradient films has a large glass temperatures range because of the gradient structure. The good properties of waterproof, calorifics, and ultraviolet-absorption were also determined by DSC, UV and water contact angle measurements.