The optical properties of polynorbornene materials greatly decreased due to traditional modification strategies of improving thermal properties.A kind of norbornene dicarboximide monomer with the structure of p-perfluorohexyl benzene was designed and synthesized by using perfluorohexyl iodide,p-bromoaniline and nadic anhydride.And a novel fluorinated norbornyl homopolymer(PNANPF6)was prepared by ring-opening metathesis polymerization.As contrast groups,four homopolymers with similar structure including benzene(PNANP),p-methylbenzene(PNANPC1),p-trifluoromethyl benzene(PNANPF1)and p-hexylbenzene(PNANPC6)were synthesized.The structures of polymers were demonstrated by NMR and IR spectra.Under the premise that the thermal and mechanical properties can be basically maintained,the water/n-dodecane contact angle of PNANPF6 is 18°/26° higher than that of PNANP.Besides,the transmittance at 400 nm/800 nm is 36%/22%higher than that of PNANP.These results fully prove that the introduction of imide,benzene and perfluorohexyl structures can synergically improve the optical properties,hydrophobicity and oleophobicity of norbornene polymers.This study provided a new strategy for the preparation of novel multifunctional norbornene polymers,as well as laid a theoretical foundation for the expanding application of polynorbornene materials.
norbornene dicarboximidefluorinated norbornyl homopolymeroptical propertieshydrophobicity and oleophobicity
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