Changes in electrical properties in α- and γ-exposed PADC track detector

Phukan, T.; Dwivedi, K.K.; Goswami, T. D.; Das, Hirendra

doi:10.1016/s1350-4487(00)00164-5

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…However, implanted devices fabricated using these elastomers are known to suffer from polymer degradation under certain circumstances with the biostability profile of a material influenced by many interrelated factors including the methods of sterilization [13][14][15][16]. Numerous publications have dealt with the changes in the electrical and optical properties of polymers under the influence of ionizing radiation [17][18][19][20][21][22][23]. At the same time, radiation effects on the electrical properties of polymers are of particular interest to science and technology and they have many applications in modern engineering [21,24].…”

Section: Introductionmentioning

confidence: 99%

Investigations on the electrical and structural properties of electron-beam irradiated polyurethane

All¹

2007

J. Phys. D: Appl. Phys.

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The effect of electron-beam (eb) irradiation on the electrical, optical, thermal and structural properties of polyurethane-elastomer (Pu) sheets of thickness 0.076 mm was investigated. The samples were exposed to eb at ascending dose levels in the range 90–300 kGy. Optical properties and structural studies using Fourier transform infrared measurements and x-ray diffraction technique were performed on un-irradiated and irradiated samples. Dc-conductivity measurements were carried out in the temperature range 306–413 K. It was found that the electrical conductivity of polyurethane-elastomer increased due to eb irradiation via degradation mechanisms. Furthermore, the activation energy was calculated, as a function of the eb doses. Also, at the eb irradiation doses, in the range 200–300 kGy, radiation causes branching that reduces crystallinity and induces further lattice defects that may act as scattering centres and energy barriers for the flow of electric current. Thermal gravimetric analysis study indicates the degradation of Pu due to eb irradiation, which causes the samples to start decomposition later than un-irradiated ones. The differential thermal analysis measurements exhibit a significant change in their melting behaviour.

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Section: Introductionmentioning

confidence: 99%

Investigations on the electrical and structural properties of electron-beam irradiated polyurethane

All¹

2007

J. Phys. D: Appl. Phys.

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“…Radiation effects on dielectric properties of polymers have been previously studied [2][3][4][5]. Due to the passage of a-particle in polyallyldiglycol carbonate, C 12 H 18 O 7 (CR-39) dielectric polymer, used as a track detector, a damage zone is created.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Change in the Dielectric Properties of CR-39 Polymer Track Detector Due to α-Irradiation in the Frequency Range from 100 Hz to 100 kHz

Eissa

Tammam

Abo-Elsoude

2007

International Journal of Polymeric Materials

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The dielectric properties in the frequency range from 100 Hz to 100 kHz of polyallyldiglycol carbonate ''CR-39'' samples before and after irradiations have been investigated. The irradiations were verified with 4.84 MeV a-particles at different irradiation times. The dependence of the dielectric properties of unirradiated and irradiated samples at room temperature (25 C) and constant frequency (10 kHz) on the total number of a-particles have been studied. It was found that the CR-39 can be used as a detector for high a-particles fluxes.

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“…Therefore, the stabilization of a PVC polymer using a variety of additives is required 1. Organic materials as additives have the advantage of being metal free and environmentally acceptable 2–6…”

Section: Introductionmentioning

confidence: 99%

Studies on the effect of laser radiation on the thermal stability of stabilized poly(vinyl chloride)

Nouh

Radwan

Agami

et al. 2003

J of Applied Polymer Sci

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Nonisothermal studies were carried out using thermogravimetry (TG) and differential thermogravimetry (DTG) to obtain the activation energy of the decomposition for poly(vinyl chloride) (PVC), stabilized by ethyl, N-phenylmaleimide, and 4-carboxylate (ENPMC). Thermal gravitational analysis (TGA) indicated that the ENPMC-PVC samples decompose in two main breakdown stages. The effect of the addition of a stabilizer (ENPMC), with different concentrations, to PVC was studied. The results indicate that the addition of ENPMC with 0.01 g/1 g PVC enhances the thermal stability of pure PVC. Samples from 0.01 g ENPMC/1 g PVC were exposed to infrared laser radiation with energy fluency at levels between 0.95 and 8.53 J/cm 2 . The results of the thermal experiments indicate that the onset temperature of decomposition T 0 and thermal activation energy of decomposition E a are affected by the laser energy fluency owing to the simultaneous processes of degradation and crosslinking. The variation of transition temperatures with either the stabilizer concentration or the laser energy fluence was determined using differential thermal analysis (DTA). The results indicate that the irradiation with a laser to 7.11 J/cm 2 decreases the melting temperature of the pure PVC and this is most suitable for applications requiring the molding of this polymer at lower temperatures.

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Changes in electrical properties in α- and γ-exposed PADC track detector

Cited by 6 publications

References 7 publications

Investigations on the electrical and structural properties of electron-beam irradiated polyurethane

Investigations on the electrical and structural properties of electron-beam irradiated polyurethane

A Study on the Change in the Dielectric Properties of CR-39 Polymer Track Detector Due to α-Irradiation in the Frequency Range from 100 Hz to 100 kHz

Studies on the effect of laser radiation on the thermal stability of stabilized poly(vinyl chloride)

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