TITLE:
Miscibility Behavior of Poly Ethylene Glycol or Poly Ethylene Succinate/Chlorinated Poly Vinyl Chloride Blends Studied by Dielectric Relaxation Spectroscopy
AUTHORS:
Taha A. Hanafy
KEYWORDS:
Miscibility; Dielectric Relaxation; Electric Modulus; Blending
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.3 No.2,
June
5,
2013
ABSTRACT:
The miscibility of chlorinated poly vinyl chloride (CPVC) and poly
ethylene glycol (PEG) or poly ethylene succinate (PES) had been investigated
using dielectric relaxation spectroscopy (DRS) over frequency and temperature
ranges; 10 kHz - 4 MHz and 300 - 450 K,
respectively. Three relaxation processes namely ρ-, α’-, and α-relaxation processes
were observed for tan(δ) and the electric modulus M" of
pure components and blends. The first one was attributed to the space charge
polarization or the Maxwell-Wagner polarization. The second one was related to
the amorphous regions located between the lamellar crystal stacks. The third
one was due to the micro-Brownian motion of CPVC main chains. This process was
found to be dependent in respect of temperature and frequency. The molecular
dynamics of α-relaxation process were influenced by
blending, i.e., the dielectric
strength (De),
the peak broadness, and the peak maximum of tan(δ) were found to be
compositional dependent. Electric modulus analysis reveals that there is a role
of electrode polarization for the dielectric relaxation.