In this study, we attempt to prepare a new blending system of poly（vinylidene fluoride） （PVDF） and aliphatic polyketone （POK） by melt compounding, The latter is a promising engineering plastic with comprehensive...In this study, we attempt to prepare a new blending system of poly（vinylidene fluoride） （PVDF） and aliphatic polyketone （POK） by melt compounding, The latter is a promising engineering plastic with comprehensive mechanical performances. When POK acted as minor phase to homogeneously disperse in and intimately contact with PVDF matrix, the brittle tensile behavior of neat PVDF transferred into a remarkably flexible manner （the elongation at break increased for 20 times）, and more interestingly, the room- temperature durability of β-form PVDF in the uniaxially drawn blend film was obviously better than that in the neat PVDF film. Fourier transform infrared spectroscopy revealed that specific dipole interaction existed between CF2 group of PVDF and C=O group of POK. The intermolecular dipolar interaction induced good compatibility in the PVDF/POK blends, as evidently proved by fine two-phase morphology and decreased melting points of POK crystals. Therefore, the good compatibility and interracial enhancement are responsible for the improvement of the stretch ductility and β-form room-temperature durability of the PVDF/POK blends.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 51373108 and 21574088)
文摘In this study, we attempt to prepare a new blending system of poly（vinylidene fluoride） （PVDF） and aliphatic polyketone （POK） by melt compounding, The latter is a promising engineering plastic with comprehensive mechanical performances. When POK acted as minor phase to homogeneously disperse in and intimately contact with PVDF matrix, the brittle tensile behavior of neat PVDF transferred into a remarkably flexible manner （the elongation at break increased for 20 times）, and more interestingly, the room- temperature durability of β-form PVDF in the uniaxially drawn blend film was obviously better than that in the neat PVDF film. Fourier transform infrared spectroscopy revealed that specific dipole interaction existed between CF2 group of PVDF and C=O group of POK. The intermolecular dipolar interaction induced good compatibility in the PVDF/POK blends, as evidently proved by fine two-phase morphology and decreased melting points of POK crystals. Therefore, the good compatibility and interracial enhancement are responsible for the improvement of the stretch ductility and β-form room-temperature durability of the PVDF/POK blends.
