Optical absorption and thermally stimulated depolarization current studies of nickel chloride-doped poly(vinyl alcohol) irradiated with low-level fast neutron doses

Journal Article · Mon Nov 15 00:00:00 EST 1993 · Journal of Applied Polymer Science; (United States)

DOI:https://doi.org/10.1002/app.1993.070500719· OSTI ID:5625502

Abd El-Kader, F H; Ibrahim, S S ^[1]; Attia, G ^[2]

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1. Cario Univ., Giza (Egypt). Physics Dept.
2. Cario Univ., Fayoum (Egypt). Faculty of Education

The influence of neutron irradiation on ultraviolet/visible absorption and thermally stimulated depolarization current in nickel chloride-poly(vinyl alcohol) (PVA) cast films has been investigated. The spectral measurements indicate the responsibility of the Ni[sup 2][sup +] ion in its octahedral symmetry. Dopant concentrations higher than 10 wt % NiCl[sub 2] are found to make the samples more resistant to a degradation effect caused by neutron irradiation. The thermally stimulated depolarization currents (TSDC) of pure PVA revealed the existence of the glass transition T[sub g] and space charge relaxation peaks, whereas doped-PVA samples show a new sub-T[sub g] relaxation peak. A proposed mechanism is introduced to account for the neutron effects on both glass transition and space charge relaxation peaks. The peak positions, peak currents, and stored charges of the sub-T[sub g] relaxation peak are strongly affected by both the concentration of the dopant and neutron exposure doses.

• OSTI ID: 5625502
• Journal Information: Journal of Applied Polymer Science; (United States), Vol. 50:7; ISSN 0021-8995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PVA
PHYSICAL RADIATION EFFECTS
DEPOLARIZATION
FAST NEUTRONS
NICKEL CHLORIDES
OPTICAL PROPERTIES
ALCOHOLS
BARYONS
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
NEUTRONS
NICKEL COMPOUNDS
NUCLEONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYMERS
POLYVINYLS
RADIATION EFFECTS
TRANSITION ELEMENT COMPOUNDS
360605* - Materials- Radiation Effects