Preparation and properties of interpenetrating network fluoropolysiloxane/polypropylene hydrophobic materials

Vinyl-terminated fluoropolysiloxane (FSI) was prepared from 1, 3, 5-trimethyl-1, 3, 5 (3, 3, 3-trifluoroethyl) cyclotrisiloxane (D3F), octamethylcyclotetrasiloxane (D4) and tetramethyltetravinyl cyclotetrasiloxane (D4Vi) in the presence of alkali glue. A series of interpenetrating network (IPN) FSI/PP composite hydrophobic materials were formed by high temperature melt polymerization using plastic grade polypropylene (PP), perfluorohexylethylene (TE-6), trimethylolpropane triacrylate (TMPTA) and maleic anhydride grafted PP (MAH-g-PP) as matrix resin, secondary hydrophobic modifier, crosslinking agent and compatibilizer, respectively. The structure of the composites was characterized by FTIR. The comprehensive properties and surface morphology of the composites were tested by tensile testing machine, contact angle measuring instrument, SEM, AFM and TG-DSC. The results showed that when D4Vi dosage was 0.05% of the total FSI mass, TE-6 dosage was 5% of the total FSI/PP mass, MAH-g-PP dosage was 6% of the total FSI/PP mass, and TMPTA dosage was 3% of the total FSI/PP mass, the hydrophobic contact angle of FSI/PP reached 138.3° and oleophobic contact angle reached 46.1°, 55.56% and 157.54% higher than those of pure PP, respectively. © 2022, Editorial Office of FINE CHEMICALS. All right reserved.