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      Properties and Applications of the β Phase Poly(vinylidene fluoride)

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          Abstract

          Poly(vinylidene fluoride), PVDF, as one of important polymeric materials with extensively scientific interests and technological applications, shows five crystalline polymorphs with α, β, γ, δ and ε phases obtained by different processing methods. Among them, β phase PVDF presents outstanding electrical characteristics including piezo-, pyro-and ferroelectric properties. These electroactive properties are increasingly important in applications such as energy storage, spin valve devices, biomedicine, sensors and smart scaffolds. This article discusses the basic knowledge and character methods for PVDF fabrication and provides an overview of recent advances on the phase modification and recent applications of the β phase PVDF are reported. This study may provide an insight for the development and utilization for β phase PVDF nanofilms in future electronics.

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          Multiferroic magnetoelectric composites: Historical perspective, status, and future directions

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            Electroactive phases of poly(vinylidene fluoride): Determination, processing and applications

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              Ferroelectric polymers.

              A Lovinger (1983)
              Piezoelectricity and pyroelectricity, traditionally encountered in certain single crystals and ceramics, have now also been documented in a number of polymers. Recently, one such polymer-poly(vinylidene fluoride)-and some of its copolymers have been shown to be ferroelectric as well. The extraordinary molecular and supermolecular structural requirements for ferroelectric behavior in polymers are discussed in detail, with particular emphasis on poly(vinylidene fluoride). Piezoelectric, pyroelectric, and ferroelectric properties are also briefly reviewed, as are some promising applications of such polymers.
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                Author and article information

                Journal
                Polymers (Basel)
                Polymers (Basel)
                polymers
                Polymers
                MDPI
                2073-4360
                26 February 2018
                March 2018
                : 10
                : 3
                : 228
                Affiliations
                [1 ]Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China; ruanlx948536015@ 123456yeah.net (L.R.); 1670523@ 123456stu.neu.edu.cn (X.Y.); qingw@ 123456smm.neu.edu.cn (G.Q.)
                [2 ]Computer Teaching and Researching Section, Shenyang Conservatory of Music, Shenyang 110818, China; changyf537@ 123456126.com
                [3 ]Suzhou Institute of Biomedical, Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China; zhoulq@ 123456sibet.ac.cn
                Author notes
                Article
                polymers-10-00228
                10.3390/polym10030228
                6415445
                30966263
                20525754-13da-4ad5-81fd-23f11e6710fa
                © 2018 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 27 December 2017
                : 13 February 2018
                Categories
                Review

                β phase pvdf,electroactive properties,nanofilms,sensor and actuator,spin valve devices

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