IPN型含氟聚硅氧烷/PP疏水材料的制备及性能

以1 ,3 ,5-三甲基-1 ,3 , 5(三氟丙基)环三硅氧烷（D3F）、八甲基环四硅氧烷(D4)、四甲基四乙烯基环四硅氧烷（D4Vi）为功能单体，在碱胶催化下制备乙烯基封端含氟聚硅氧烷（FSI），再以注塑级聚丙烯（PP）为基体树脂，以全氟己基乙烯（TE-6）为二次疏水改性剂，三羟甲基丙烷三丙烯酸酯（TMPTA）为交联剂、马来酸酐接枝PP（MAH-g-PP）为增容剂，高温熔融聚合形成互穿网络结构（IPN）FSI/PP复合疏水材料。采用FTIR对复合材料结构进行了表征；利用拉力试验机、接触角测量仪、SEM、AFM和TG-DSC对复合材料的综合性能和表面形貌进行了分析。结果表明，当D4Vi封端剂用量为FSI总量的0.05wt%，MAH-g-PP用量为FSI/PP总量的6wt%，TMPTA添加量为FSI/PP总量的3wt%时，改性后FSI/PP疏水角达到138.3o，疏油角达到46.1o，相比于纯PP分别提高55.56%、157.54%。

Preparation and properties of interpenetrating network fluoropolysiloxane/polypropylene hydrophobic materials

Vinyl-terminated fluoropolysiloxane (FSI) was prepared with 1,3,5-trimethyl-1,3,5 (trifluoroethyl) cyclotrisiloxane (D3F), octamethylcyclotetrasiloxane (D4) and tetramethyltetravinyl cyclotetrasiloxane (D4vi) as functional monomers using alkali glue as the catalysis. The plastic grade polypropylene (PP), perfluorohexylethylene (TE-6), trimethylolpropane triacrylate (TMPTA), and maleic anhydride grafted PP (MAH-g-PP) were used as matrix resin, secondary hydrophobic modifier, crosslinking agent, and compatibilizer respectively. As a result, interpenetrating network FSI/PP composite hydrophobic material was formed by high temperature melt polymerization. The structure of the composites was characterized by FTIR. The comprehensive properties and surface morphology of the composites were analyzed by tensile testing machine, contact angle measuring instrument, SEM, AFM, and TG-DSC. The results showed that when the amount of D4Vi end capping agent was 0.05wt% of the total FSI, the usage of MAH-g-PP was 6wt% of the total FSI/PP, and the addition of TMPTA was 3wt% of the total FSI/PP, the hydrophobic angle of FSI/PP reached 138.3o and the oil hydrophobic angle reached 46.1o, which was 55.56% and 157.54% higher than that of pure PP respectively.