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Influence of morphology on electric conductance in poly(ethylene naphthalene‐2,6‐dicarboxylate)
Author(s) -
Chavez Jose Fidel,
MartinezVega Juan Jorge,
Zouzou Noureddine,
Guastavino Jean
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200450862
Subject(s) - crystallinity , electric field , materials science , dielectric , electrical resistivity and conductivity , amorphous solid , polypropylene , composite material , insulator (electricity) , morphology (biology) , conductance , condensed matter physics , optoelectronics , electrical engineering , chemistry , crystallography , physics , quantum mechanics , biology , genetics , engineering
Polymers find an important field of application in the electrical industry because of their utilization as insulators and dielectrics. The challenge over the last several years has been to make electrical compounds smaller in size. In that way the material morphology is of strategic importance in the performance of new components in relation to their geometry. Therefore, it is important to know the influence of different types of stress on electric properties of the materials. We have studied the influence of the crystallinity on electric conductance of poly(ethylenenaphthalene‐2,6‐dicarboxylate) (PEN), which is increasingly replacing some dielectrics (polypropylene and PET) in certain electric applications. Starting from an amorphous PEN, samples with various crystallinities were obtained and analyzed using DSC in order to determine their thermal characteristics. Moreover, measurements of charge and discharge currents were carried out on PEN samples to characterize their electric properties. The steady state current observed after 120 min, in response to the electric field, shows an increase in the insulator resistivity with the crystallinity. The increase in the crystallinity favors a decrease in the free volume, so the movement of charges is restricted especially by the species of large sizes.