@article{GuliakovaGorokhovatskyGalikhanovetal.2019,
  author    = {Guliakova, A. A. and Gorokhovatsky, Yu. A. and Galikhanov, M. F. and Fr{\"u}bing, Peter},
  title     = {Thermoactivational spectroscopy of the high impact polystyrene based composite films},
  series = {St. Petersburg Polytechnic University Journal : Physics and Mathematics},
  volume    = {12},
  journal   = {St. Petersburg Polytechnic University Journal : Physics and Mathematics},
  number    = {4},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {2405-7223},
  doi       = {10.18721/JPM.12401},
  pages     = {9 -- 16},
  year      = {2019},
  abstract  = {The relaxation processes in the high impact polystyrene (HIPS) films filled with 2, 4, 6 vol.\% of titanium dioxide (TiO2) of the rutile modification have been studied using the thermally stimulated depolarization current (TSDC) technique. Three relaxation processes were observed in the composite HIPS films. The first one (a-relaxation peak) appeared at about 93 degrees C and represented the glass transition. The second peak p was a high-temperature part of the first one and overlapped it. The p peak was caused by the release and subsequent motion of excess charges deposited during the electret preparation or the polarization process. The third peak appeared at about 150 degrees C and occurred only in the spectra of the composite films. The overlapping peaks were separated by the thermal cleaning technique. The subsequent application of the numerical methods (the Tikhonov regularization technique) allowed to determine the activation energy of the second process and to compare the obtained value with the corresponding data on the dielectric relaxation.},
  language  = {ru}
}
@article{HoepfnerFruebingNeumannetal.1996,
  author    = {H{\"o}pfner, Ulf and Fr{\"u}bing, Peter and Neumann, Werner and Kaminorz, Yvette and Brehmer, Ludwig},
  title     = {Polarization Processes of poly(DMDAAC) films studied by TSD current},
  year      = {1996},
  language  = {en}
}
@article{YusupovFruebingBrehmeretal.1995,
  author    = {Yusupov, R. G. and Fr{\"u}bing, Peter and Brehmer, Ludwig and Mislavski, B. V.},
  title     = {Langmuir Filme des Polymers "NAFION" als sensibles Element eines Feuchtesensors},
  year      = {1995},
  language  = {de}
}
@article{BrehmerFruebingHerkneretal.1995,
  author    = {Brehmer, Ludwig and Fr{\"u}bing, Peter and Herkner, G. and Kaminorz, Yvette},
  title     = {Pyroelektrische Untersuchungen an d{\"u}nnen Schichten von organischen Seitenkettenpolymeren},
  year      = {1995},
  language  = {de}
}
@article{PenacoradaYusupovMilaskietal.1995,
  author    = {Penacorada, Florencio and Yusupov, R. G. and Milaski, B. and Fr{\"u}bing, Peter and Brehmer, Ludwig},
  title     = {Elektrische Eigenschaften von polyionischen LB-Filmen},
  year      = {1995},
  language  = {de}
}
@article{FruebingGrasnickHerkneretal.1995,
  author    = {Fr{\"u}bing, Peter and Grasnick, G. and Herkner, G. and Janietz, Dietmar and Brehmer, Ludwig},
  title     = {Pyroelektrische Untersuchungen an Polyvinylalkoholen mit Azobenzen / Alkoxy - Seitenketten},
  year      = {1995},
  language  = {de}
}
@article{WangFruebingWirgesetal.2010,
  author    = {Wang, Feipeng and Fr{\"u}bing, Peter and Wirges, Werner and Gerhard, Reimund and Wegener, Michael},
  title     = {Enhanced Polarization in Melt-quenched and Stretched Poly(vinylidene Fluoride-Hexafluoropropylene) Films},
  issn      = {1070-9878},
  doi       = {10.1109/TDEI.2010.5539679},
  year      = {2010},
  abstract  = {beta-phase poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) copolymer films were prepared by uniaxially stretching solution-cast or melt-quenched samples. Different preparation routes lead to different amounts of the crystalline alpha and beta phases in the films, as detected by means of Fourier-transform infrared spectroscopy and X-ray diffractometry. The beta phase is significantly enhanced in melt-quenched and stretched films in comparison to solution-cast and stretched films. This is particularly true for copolymer samples with higher HFP content. The beta- phase enhancement is also observed in ferroelectric-hysteresis experiments where a rather high polarization of 58 mC/ m(2) was found on melt-quenched and stretched samples after poling at electric fields of 140 MV/m. After poling at 160 MV/m, one of these samples exhibited a piezoelectric d(33) coefficient as high as 21 pC/N. An electric-field-induced partial transition from the alpha to the beta phase was also observed on the melt-quenched and stretched samples. This effect leads to a further increase in the applications-relevant dipole polarization. Uniaxially stretched ferroelectric- polymer films are highly anisotropic. Dielectric resonance spectroscopy reveals a strong increase of the transverse piezoelectric d(32) coefficient and a strong decrease of the transverse elastic modulus c(32) upon heating from 20 to 50 degrees C.},
  language  = {en}
}
@article{FruebingKremmerGerhardetal.2006,
  author    = {Fr{\"u}bing, Peter and Kremmer, Alexander and Gerhard, Reimund and Spannoudaki, Anna and Pissis, Polycarpos},
  title     = {Relaxation processes at the glass transition in polyamide 11 : From rigidity to viscoelasticity},
  issn      = {0021-9606},
  doi       = {10.1063/1.2360266},
  year      = {2006},
  language  = {en}
}
@article{FruebingKremmerNeumannetal.2004,
  author    = {Fr{\"u}bing, Peter and Kremmer, Alexander and Neumann, Werner and Gerhard, Reimund and Guy, I. L.},
  title     = {Dielectric relaxation in piezo-, pyro- and ferroelectric polyamide 11},
  year      = {2004},
  abstract  = {Ferroelectric polyamide 11 films were prepared by melt-quenching, cold-drawing and electrical poling. Their ferroelectricity was studied by means of dielectric-hysteresis measurements. A remnant polarisation of up to 35 mC/m(2) and a coercive field of 75 MV/m were obtained. The piezoelectric d(33) coefficient and the pyroelectric coefficient of the films are reduced by annealing just below the melting region, but remain at about 3 pC/N and 8 muC/(m(2)K), respectively, during further heat treatment. Differential scanning calorimetry (DSC), dielectric relaxation spectroscopy (DRS) and thermally stimulated depolarisation (TSD) were applied for investigating the conformational changes induced by melt-quenching, cold-drawing and annealing. The results indicate that the cold-drawn film mainly consists of a rigid amorphous phase which exhibits considerably lower conductivity, no glass transition and consequently no dielectric a relaxation. Instead, an a, relaxation is found, which is related to chain motions in regions of the rigid amorphous phase where the amide-group dipoles are not perfectly ordered. Annealing removes imperfectly ordered structures, but does not affect the ferroelectric polarisation. Therefore, it may be concluded that essentially the a, relaxation causes the thermally non-stable part of the piezo- and pyroelectricity in polyamide 11},
  language  = {en}
}
@article{FruebingKruegerGoeringetal.2002,
  author    = {Fr{\"u}bing, Peter and Kr{\"u}ger, Harald and Goering, H. and Gerhard, Reimund},
  title     = {Relaxation behaviour of thermoplastic polyurethanes with covalently attached nitroaniline dipoles},
  year      = {2002},
  language  = {en}
}