Swelling of semi-crystalline PVDF by a PMMA-based nanostructured diblock copolymer: Morphology and mechanical properties
作者： Evdokia K. Oikonomou , Sylvie Tencé-Girault , Pierre Gérard , Sophie Norvez
DOI: 10.1016/J.POLYMER.2015.08.055
关键词: Miscibility 、 Amorphous solid 、 Copolymer 、 Crystallinity 、 Materials science 、 Composite material 、 Polyvinylidene fluoride 、 Swelling 、 Small-angle X-ray scattering 、 Lamellar structure
摘要: Abstract The influence of a self-organizing diblock copolymer on the morphology, crystallinity and mechanical properties high molecular weight polyvinylidene fluoride (PVDF) is investigated. A spherically organized nanostructured containing 25 wt% soft acrylate block 75 wt% rigid polymethylmethacrylate (PMMA) incorporated in PVDF proportions varying between 12.5 70 wt% copolymer. DSC DMA experiments prove miscibility glassy PMMA with amorphous fraction PVDF, whereas fully segregated, preserving nanostructuration blend. Transmission electron microscopy SAXS show that confined into inter-lamellar gallery giving rise to swelling crystalline/amorphous lamellar morphology. long period L p varies from 120 A pure 200 A presence WAXS ATR spectroscopy polar β polymorph favored blends preserved. Tensile tests demonstrate large improvement elongation at break, without significant loss strength for samples lower amounts
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