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首页> 外文期刊>Journal of Materials Research >Polarity-induced ferroelectric crystalline phase in electrospun fibers of poly(vinylidene fluoride)/polyacrylonitrile blends
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Polarity-induced ferroelectric crystalline phase in electrospun fibers of poly(vinylidene fluoride)/polyacrylonitrile blends

机译：聚偏二氟乙烯/聚丙烯腈共混物电纺纤维中极性诱导的铁电结晶相

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摘要

In this study, crystal orientation and polymorphism formation in electrospun poly(vinylidene fluoride) (PVDF)/polyacrylonitrile (PAN) blend fibers after melt-recrystallization were studied. To achieve uniform alignment of electrospun fibers, mechanical stretching was applied to the as-spun nonwoven fibers at 110 ℃. Pure ferroelectric β-PVDF crystals in the PAN matrix were achieved, and both polar β-PVDF and polar PAN crystals oriented with their chain axes parallel to the fiber axes. After melt-recrystallization of PVDF, a significant amount of ferroelectric β crystals was retained in addition to the formation of nonpolar a crystals. A polarized Fourier transform infrared study showed that the degree of orientation of ferroelectric β-PVDF crystals was higher than that of nonpolar α crystals, suggesting that the β-PVDF crystals should form at the PVDF/PAN interfaces because of strong dipolar and hydrogen bonding interactions between vinylidene fluoride and acrylonitrile units. The nonpolar α-PVDF crystals should form in the center of PVDF domains.
机译：在这项研究中，研究了熔融重结晶后电纺聚偏二氟乙烯（PVDF）/聚丙烯腈（PAN）共混纤维的晶体取向和多态性的形成。为了实现电纺纤维的均匀排列，在110℃下对初纺非织造纤维进行机械拉伸。在PAN基质中获得了纯铁电β-PVDF晶体，极性β-PVDF和极性PAN晶体的链轴与纤维轴平行。 PVDF熔融重结晶后，除形成非极性a晶体外，还保留了大量铁电β晶体。极化傅立叶变换红外研究表明，铁电β-PVDF晶体的取向度高于非极性α晶体，这表明β-PVDF晶体应在PVDF / PAN界面形成，因为强的偶极和氢键相互作用在偏二氟乙烯和丙烯腈单元之间。非极性α-PVDF晶体应形成在PVDF域的中心。

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  • 来源
    《Journal of Materials Research》 |2012年第10期|p.1389-1398|共10页
  • 作者

    Run Su; Ganji Zhong; Qiang Fu; Lifeng Zhang; Hao Fong; Lei Zhu;

  • 作者单位

    College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, People's Republic of China Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202;

    College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, People's Republic of China Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202;

    College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, People's Republic of China;

    Department of Chemistry, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701-3995;

    Department of Chemistry, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701-3995;

    Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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