Effect of γ-irradiation on the refractive indices and optical absorption of Poly(Vinyl Alcohol) doped with NiCl2 and CrCl3

Khaled, M. A.; Sharaf, F.; Risk, Mahmmoud S.; El-Ocker, M. M.

doi:10.1016/0141-3910(93)90147-b

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…Inorganic additives, such as transition metal salts, have considerable effect on the optical and electrical properties of PVA [8] . Ionizing radiation has a significant effect on polymer properties, and certain physical properties, in particular may be modified dramatically [1,2,[9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

γ-Irradiation Effect on the Non-Cross-Linked and Cross-Linked Polyvinyl Alcohol Films

El‐Sawy

El‐Arnaouty

Ghaffar

2010

Polymer-Plastics Technology and Engineering

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The non-cross-linked and cross-linked polyvinyl alcohol (PVA) films were prepared by the casting method then irradiated with gamma rays for various doses up to 300 kGy. The structure and characterization of PVA were determined by using Infrared spectroscopy (FTIR), ultraviolet spectroscopy (UV) and X-ray diffraction (XRD). Swelling behaviour was also investigated. Mechanical properties have been examined with respect to the absorbed dose. The color of the films changed to yellowish-white after irradiation and the crystallinity of the films decreased with increasing dose. Additional changes observed by FTIR analysis of the degradation products demonstrated that the radiolysis of PVA was initiated by liberation of H and OH groups leading to scission of the main chains and formation of carbonyl and double bond groups. Thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) were performed. The FTIR, UV, XRD and mechanical properties indicate that the addition of cross-linker led to high degrees of interaction between the cross-linker and the macromolecules of polymeric chains and acted as a stabilizing agent against gamma irradiation.

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Section: Introductionmentioning

confidence: 99%

γ-Irradiation Effect on the Non-Cross-Linked and Cross-Linked Polyvinyl Alcohol Films

El‐Sawy

El‐Arnaouty

Ghaffar

2010

Polymer-Plastics Technology and Engineering

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“…It is worthy noted that unirradiated samples are pale pink due to the Mn 2+ ions because of d-d transitions [12]. It was observed that the pale pink colour became clear by increasing γ-irradiation dose, This was explained by the formation of conjugated double bonds and/or trapped free radicals and ions [3]. Considering the new physical properties of the irradiated polymer.…”

Section: Fig (2)mentioning

confidence: 99%

“…Inorganic additives such as transition metal salts have considerable effect on the optical and electrical properties of PVA polymer [1,2]. Irradiation with X-rays, alpha, beta and gamma radiation also have a significant effect on polymer properties and some physical properties are usually modified [3,4].…”

Section: Introductionmentioning

confidence: 99%

AC-Conductivity and Dielectric Properties of γ-Irradiated PVA Films Doped With Mn2+ Ions

2000

Egyptian Journal of Solids

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The stability as well as the electrical properties of both unirradiated and γ-irradiated poly(vinyl alcohol)-PVA films doped with MnSO 4 .H 2 O at a definite concentration of 15% have been studied. The dielectric loss tangent tan δ, electrical conductivity σ and dielectric constant ε' in the frequency range 100 Hz-20 KHz were measured at different temperatures. It has been demonstrated that the suitable mechanism of conduction is the correlated barrier hopping model. The exponent S according to the relation σ(ω)=A(ω) s was estimated and found to be less than unity and decreased with increasing the temperature Furthermore a nonlinearly of log σ against log f was observed at log f in the range (3.7-4.3) for doses ≥100 kGy at the temperatures of 333 and 343 k.

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“…It can be considered as a good host for inorganic nano particle due to their high surface to bulk ratio which can significantly affect the properties of PMMA matrix [4] , as a result of the above properties, PMMA has been extensively used in various industrial sectors such as : substrate material for precision optics components, in fabrication of electronic memories , gas sensing [ 9 -5 ] . Irradiation with X-rays, alpha, beta and gamma radiation also have a significant effect on polymer properties and some physical properties are usually modified [10] . High energy radiations, such as γ-rays , change the physical properties of the materials they internal structure of the absorbed substances.…”

Section: Introductionmentioning

confidence: 99%

معلمات التشتت البصري لـ (ميثيل أحمر مخدر Pmma) المشع بأشعة جاما

A.A.Kamel M.H. Abdul-Allah,

W.H.Abass

2023

cbej

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تم تحديد تشتت مؤشرات الانكسار لأغشية (ميثيل أحمر مخدر PMMA) المشعة بواسطة أشعة جاما باستخدام نموذج Wemple-DiDomenico. يتم حساب طاقة المذبذب E0 وطاقة التشتت Ed ومعامل الامتصاص وعمق الجلد قبل وبعد التشعيع. تستخدم نظرية درود للعوازل الكهربائية لحساب تركيز الحامل نوبت. وجد أن نوبت يزيد بعد التشعيع.

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Effect of γ-irradiation on the refractive indices and optical absorption of Poly(Vinyl Alcohol) doped with NiCl2 and CrCl3

Cited by 11 publications

References 5 publications

γ-Irradiation Effect on the Non-Cross-Linked and Cross-Linked Polyvinyl Alcohol Films

γ-Irradiation Effect on the Non-Cross-Linked and Cross-Linked Polyvinyl Alcohol Films

AC-Conductivity and Dielectric Properties of γ-Irradiated PVA Films Doped With Mn2+ Ions

معلمات التشتت البصري لـ (ميثيل أحمر مخدر Pmma) المشع بأشعة جاما

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