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PVP在室温以上的介电性能研究 被引量：1

Dielectric properties of PVP above room temperature
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摘要 通过在40℃～160℃,63.1Hz～4MHz范围内测量PVP的介电松弛谱,发现了PVP的介电松弛中含有α松弛,β松弛和γ松弛三种极化过程,其中α松弛归因于聚合物的玻璃化转变,β松弛归因于聚合物的侧基运动,γ松弛归因于聚合物的链段局域运动;而介电损耗低频处有直流电导的贡献。 According to an experiment that measures the dielectric relaxation spectra of PVP at the range of 40℃ - 160 ℃, 63.1Hz - 4MHz, it is found that there are three kinds of polarization processes in the dielectric relaxation of PVP - α relaxation, β relaxation and γ relaxation, α relaxation appeares due to the glass transition of polymers, βrelaxation appeares due to the side group motion of polymer, and γ relaxation appeares due to local motion of polymer chains. Besides, direct-current conductivity contributes to the dielectric loss at low frequency.
作者 时原
机构地区 西南民族大学预科教育学院
出处 《西南民族大学学报（自然科学版）》 CAS 2011年第1期119-124,共6页 Journal of Southwest Minzu University(Natural Science Edition)
关键词 PVP 介电 松弛峰 玻璃化转变 分子运动 PVP dielectric relaxation peak glass transition molecular motion
分类号 O63 [理学—高分子化学]
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参考文献14

  • 1崔英德,易国斌.聚乙烯吡咯烷酮[M].北京:科学出版社,2001.
  • 2SAKURAI K, MAEGAWA T. Glass Transition Temperature of Chitosan and Miscibility of Chitosan/Poly(N-vinyl Pyrrolidone) Blends[J]. Polymer, 2000, 41: 7051-7056.
  • 3SILVANA NAVARRO CASSU, MARIA ISABEL FELISBERTI. Poly(vinyl alcohol) and Poly(vinylpyrrolidone) Blends: 2. Study of Relaxations by Dynamic Mechanical Analysis[J]. Polymer, 1999, 40:4845-4851.
  • 4CHAOWEI HAO, YING ZHAO, YONG ZHOU. Interactions between Metal Chlorides and Poly(vinyl pyrrolidone) in Concentrated Solutions and Solid-State Films[J]. Journal of Polymer Science: Part B, 2007, 45: 1589-1598,.
  • 5SERGEY VYAZOVKIN, ION DRANCA. Probing Beta Relaxation in Pharmaceutically Relevant Glasses by Using DSC[J]. Pharmaceutical Research, 2006, 23: 2-5.
  • 6KONSTANTINOS CHRISSAFIS, KONSTANTINOS M. Paraskevopoulos. Thermal and Dynamic Mechanical Behavior of Bionanocomposites: Fumed Silica Nanoparticles Dispersed in Poly (vinyl pyrrolidone), Chitosan, and Poly (vinyl alcohol)[J]. Journal of Applied Polymer Science, 2008, 110: 1739-1749.
  • 7SUMAN A LUTHRA, IAN M HODGE, MICHAEL J PIKAL. Investigation of the Impact of Annealing on Global Molecular Mobility in Glasses: Optimization for Stabilization of Amorphous Pharmaceuticals[J]. Journal of Pharmaceutical Sciences, 2008, 97: 3865-3882.
  • 8KHARE PK, VERMA A, SAHU DK, Srivastava RK. The Evaluation of Dielectric Properties of Pure Polyvinyl Pyrrolidone Films[J]. Indian Journal of Physics, 2003, 77a (5): 453-457.
  • 9KHARE PK, CHANDOK RS. Dielectric Behavior of Solution.Grown Poly(vinyl)pyrrolidone Films[J]. Indian Journal of Physics, 1995a, 69A(5): 545-51.
  • 10SILVINA CERVENY, ANGEL ALGERIA, JUAN COLMENERO. Broadband Dielectric Investigation on Polyvinyl Pyrrolidone and Its Water Mixtures[J]. The Journal of Chemical Physics, 2008, 128: 044901.

同被引文献16

  • 1Narsimha Rao V V R, Kalpalatha A. Electrical conduction mecha- nism in poly ( vinyl pyrrolidone ) films. Polymer, 1987 ; 28 ( 4 ) : 648-650.
  • 2De Queiroz A A, Soares D A W. Resistive-type humidity sensors based on PVP-Co and PVP-I2 complexes. Journal of Polymer Science Part b-Polymer Physics, 2001 ; 39(4) : 459-469.
  • 3Lakshminarayana K, Narasimha Rao V V R. Pyroelectrie behaviour of polyvinyl alcohol (PVA)-polyvinylpyrrolidone (PVP) polymer blend films. Materials Letters, 1997 ; 30( 1 ) : 65-71.
  • 4Reddy R, Chang L Q, Luthra S. The glass transition and sub-T(g) - relaxation in pharmaceutical powders and dried proteins by thermally stimulated current. Journal of Pharmaceutical Science, 2009; 98( 1 ) : 81-93.
  • 5Narasimha Rao V V R, Kalpalatha A. Thermally stimulated discharge currents in polyvinyl pyrrolidone polymer films. Materials Chemistry and Physics, 1987; 17(4) : 317-324.
  • 6Khare P K, Jain S K. Anomalous thermally stimulated currents and space charge in poly (vinyl pyrrolidone ). Polymer International, 2000 ; 49 ( 3 ) : 265-268.
  • 7Khare P K, Jain S K. Thermally stimulated currents in polyvinyl pyr- rolidone : polymethyl methacrylate polyblend films. Journal of Polymer Materials, 1997 ; 14( 1 ) : 65-69.
  • 8Khare P K, Verma A, Sahu D K, et al. The evaluation of dielectric properties of pure polyvinyl pyrrolidone films. Indian Journal of Phys- ics, 2003; 77a(5) : 453-457.
  • 9Khare P K, Keller J M, Datt S C. Thermally stimulated depolariza-.tion currents in sensitized polyvinyl pyrrolidone films. Indian Journal of Pure & Applied Physics, 1992 ; 30 ( 12 ) : 768-770.
  • 10Mudarra M, Belana J. Study of poty ( methyl methacrylate ) space charge relaxation by TSDC. Polymer, 1997 ; 38 (23) : 5815-5821.

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西南民族大学学报（自然科学版）
2011年 第1期

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