Abstract: Poly(acrylate-siloxane) hybrid latex particles with hard core soft shell structure and non-uniform distribution along the radius of particle for linear divinyl-terminated polysiloxane(VPS) were prepared by semicontinuous core-shell emulsion polymerization. The composition, structure, and properties of the hybrid latex particles and their films were characterized and tested by transmission electron microscope(TEM), particle size analysis, differential scanning calorimetry (DSC), metallographic microscope, energy dispersive spectrometer (EDS), fourier transform infrared spectroscopy (FTIR), and contact angle (CA). The results show that the hybrid latex particles have a core-shell structure, and the average particle size increases from 119.4 nm to 138.4 nm with the increase of VPS content in the shell layer. The increase of VPS content and annealing treatment can improve the surface enrichment degree and domain size of VPS. The microphase separation structure of hybrid latex film with double glass transition phenomenon and the formation of the VPS domain phase have improved its block resistance, flexibility and hardness at the same time. The water contact angle has a increase from 61° to 104°, the hydrophobicity is increased significantly, and the water absorption is decreased significantly.
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2023, Vol. 37 
