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Crystallization behavior and hydrophilicity of poly (vinylidene fluoride) (PVDF)/poly (styrene-co-acrylonitrile) (SAN) blends

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Abstract

Poly (styrene-co-acrylonitrile) (SAN) is a hydrophilic non-crystalline copolymer, which is initially used in this paper to improve the hydrophilicity of poly (vinylidene fluoride) (PVDF). Investigation of the crystallization behavior of PVDF/SAN blends showed that the samples presented only α phase regardless of SAN content as cooling from the melt. A double-melting phenomenon was related to the perfection or crystal size of PVDF crystals. As the SAN content is increasing, crystallization of PVDF was limited, leading to a decreased crystallinity and lamellar growth. Besides, the hydrophilicity of PVDF was improved by blending with SAN. The sample containing 70 wt.% SAN performed a similar surface property of the neat SAN owing to the besieging of the PVDF phase by SAN. Observed from the cross section of the blends, PVDF/SAN blends were partially miscible with less than 50 wt.% SAN addition. As the SAN content was more than 50 wt.%, the crystalline PVDF particles clearly dispersed in the amorphous matrix.

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Acknowledgment

Financial support from the Key Project of BMSTC (D0406003040191) is gratefully acknowledged.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing, 210009, China

    Wenzhong Ma, Jun Zhang & Shuangjun Chen

  2. Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China

    Xiaolin Wang

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  1. Wenzhong Ma
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  2. Jun Zhang
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  3. Shuangjun Chen
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  4. Xiaolin Wang
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Correspondence to Jun Zhang.

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Ma, W., Zhang, J., Chen, S. et al. Crystallization behavior and hydrophilicity of poly (vinylidene fluoride) (PVDF)/poly (styrene-co-acrylonitrile) (SAN) blends. Colloid Polym Sci 286, 1193–1202 (2008). https://doi.org/10.1007/s00396-008-1889-8

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  • DOI: https://doi.org/10.1007/s00396-008-1889-8

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