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Morphology and crystallization in mixtures of poly(methyl methacrylate)-poly(pentafluorostyrene)-poly(methyl methacrylate) triblock copolymer and poly(vinylidene fluoride)

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Abstract

The microdomain structures and crystallization behavior of the binary blends of poly(methyl methacrylate)-b-poly(pentafluorostyrene)-b-poly(methyl methacrylate) (PMMA-PPFS-PMMA) triblock copolymer with a low molecular weight poly(vinylidene fluoride) (PVDF) were investigated by small-angle X-ray scattering (SAXS), small-angle light scattering (SALS), transmission electron microscopy (TEM), optical microscopy, and differential scanning calorimetry (DSC). A symmetric, PMMA-PPFS-PMMA triblock copolymer with a PPFS weight fraction of 33% was blended with PVDF inN,N-dimethylacetamide (DMAc). In the wide range of PVDF concentration between 10.0 and 30.0 wt%, PVDF was completely incorporated within the PMMA microdomains of PMMAPPFS-PMMA without further phase separation on a micrometer scale. The addition of PVDF altered the phase morphology of PMMA-PPFS-PMMA from well-defined lamellar to disordered. The crystallization of PVDF significantly disturbed the domain structure of PMMA-PPFS-PMMA in the blends, resulting in a poorly-ordered morphology. PVDF displayed unique crystallization behavior as a result of the space constraints imposed by the domain structure of PMMA-PPFS-PMMA. The pre-existing microdomain structures restricted the lamellar orientation and favored a random arrangement of lamellar crystallites.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, Inha University, 402-751, Incheon, Korea

    Geon Seok Kim, Min Sung Kang, Mi Ju Choi, Yong Ku Kwon & Kwang Hee Lee

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  1. Geon Seok Kim
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  2. Min Sung Kang
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  3. Mi Ju Choi
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  4. Yong Ku Kwon
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  5. Kwang Hee Lee
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Correspondence to Kwang Hee Lee.

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Kim, G.S., Kang, M.S., Choi, M.J. et al. Morphology and crystallization in mixtures of poly(methyl methacrylate)-poly(pentafluorostyrene)-poly(methyl methacrylate) triblock copolymer and poly(vinylidene fluoride). Macromol. Res. 17, 757–762 (2009). https://doi.org/10.1007/BF03218611

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  • DOI: https://doi.org/10.1007/BF03218611

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