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Dielectric spectroscopy of poly(butylene succinate‐ co ‐butylene adipate) films
Author(s) -
Tai HorngJer
Publication year - 2011
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21819
Subject(s) - crystallinity , materials science , adipate , dielectric , amorphous solid , arrhenius equation , conductivity , relaxation (psychology) , dielectric spectroscopy , atmospheric temperature range , particle (ecology) , polymer chemistry , chemical engineering , analytical chemistry (journal) , thermodynamics , composite material , chemistry , activation energy , crystallography , electrode , organic chemistry , psychology , social psychology , physics , optoelectronics , oceanography , electrochemistry , engineering , geology
Abstract The results of dielectric studies in semicrystalline poly (butylene succinate‐ co ‐butylene adipate) (PBSA) by means of dielectric relaxation spectroscopy from 163 to 353 K and in the frequency range of 0.056–17,800 Hz are reported. The subglass β process is found to follow an Arrhenius temperature dependence, whereas the segmental α process follows a Vogel–Fulcher–Tammann temperature dependence. The higher temperature Maxwell–Wagner–Sillars (MWS) process was studied by applying the Bruggeman‐Hanai equation, which helped to understand the underlying relaxation dynamics. The MWS process originates from the charge accumulation at the interface between the low‐conductivity continuous medium and the high‐conductivity dispersed particles. A three‐phase model in which the medium comprises the crystalline and rigid amorphous phases (RAPs) and the particle comprises solely the mobile amorphous phases (MAPs) is required to explain the particle fraction variation with temperature. With increasing temperature, the MAP fraction increases at the expense of the RAP fraction within the continuous medium. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers.