Muthanna Journal of Pure Science (MJPS)

1

Effect Of Thermal Annealing On The Optical Properties Of Thin Films Of Polymer Blend (PMMA:PVC:PS)

Ali N. Sabbar 1*, Karar M.Talib2, and Hassan T. Badh1

Pages: 1-7 English

Abstract

In this paper, we report upon preparation and optical properties of the polymer blend
(50%PMMA:25%PVC:25%PS) thin films. The thin films have been prepared with specific ratios using the casting
technique at normal weather conditions. The films were subjected to heat treatment in varying temperatures for three
hours. The results showed that increase thermal annealing temperature leads to decrease values of the direct and indirect
energy gap, but increase the extinction coefficient and optical conductivity. The refractive index, real and imaginary
dielectric constants showed a heterogeneous behaviour. Thermal annealing by 80 oC and up leads to deformation the
thin films.

2

Synthesis and Optical Properties of Polystyrene Doped with DCM Thin Films

Akeel Shaker Tuhaiwer

Pages: 8-18 English

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Abstract

In the present work Polystyrene (PS) polymer doped with DCM laser dye thin films have been prepared
on glass substrate using casting method. The final samples of PS doped with DCM thin films were treated with
different annealing temperatures at (30, 40, 50, 60) oC. Optical absorption and transmission spectra of the prepared
thin films were recorded using UV-VIS double beam spectrometer in the wavelength range from 190 to 1100 nm.
The results shown that the allowed direct electronic transitions energy gap increased from 2.08 up to 2.25e.V as the
temperature increasing from 30 to 60oC, whereas the allowed indirect electronic transition energy gap increase from
2.02 up to 2.17 eV as the temperature increase from 30 to 60oC. The effect of temperature on the optical properties
such as Urbach’s energy, Refractive index, Extinction coefficient, Critical angle, Brewster angle, and Finesse
coefficient of PS doped with DCM thin films also studied in this work.

Keywords

cast method DCM Optical Properties PS thin films

3

Nuclear Structure of the (144 Ba, 146 Ce 148 Nd )by using the Interacting boson Approximation (IBA-2)

Zainab Sauod Muhmmed Alhmod

Pages: 19-26 English

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Abstract

The Interacting Boson Hamiltonian (IBA-2) to reproduce energy spectrum of isotones is tested The calculated ratio has been suggested that these nuclei are part of O(6) group symmetry. Reduced electric quadruple transitions between states of and magnetic dipole between states of , are calculated. The mixing ratios for transitions between are evaluated as well. All the calculated results have been compared with available experimental data and satisfactory results are obtained.

Keywords

146Ce 148Nd) Energy levels even – even( 144Ba Interacting boson model (IBA-2) Mixing Ratios quadruple moments

4

The Effects of Additive TiO2 Nanoparticles on the Optical properties of DCM Doped with PVC Thin Films

Shymaa K. Hussian1,*, Thill A. Kadhum Al-musawi1and Shatha Raheem Helal Al himidi 2

Pages: 27-35 English

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Abstract

In this work thin films containing laser dye (DCM) doped with (PVC) were prepared using casting
method. Titania (TiO2) nanoparticles also were synthesized using sol-gel technique. Different titania
nanoparticle densities (0.882×1020, 1.765×1020, 2.648×1020 and 3.530×1020 cm-3) were co-doping with dye doped
polymer to study the effect of this addition on the optical properties and electronic transition energy gaps in
cases of both direct and indirect transitions, Absorbance spectra were measured using Spectrophotometer.
Absorption and extinction coefficients as well as the refractive indices have been obtained the spectra of
absorbance at the strong absorption region. It was observed from results that the allowed direct electronic
transitions energy gap was decreasing from 2.22 to 2.175e.V with the increasing of titania nanoparticles density
and the allowed indirect electronic transition energy gap decreasing from 2.19 to 2.13e.V.

Keywords

cast method DCM Optical Properties Poly Vinyl chloride(PVC) thin films TiO2 nanoparticle.

5

On the Two Machine Permutation Flowshop Scheduling Problems Using Variable Neighborhood Search Algorithms

T. S. Abdul – Razaq1, H. M. Motair2*

Pages: 36-47 English

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Abstract

This paper considers the two machine permutation flow shop scheduling problem PFSSP. We study
some special cases of the problem

Keywords

descend method. lexicographical order non-dominated solutions Permutation flow shop Simulated Annealing variable neighborhood

6

Study the Effect of Immobilization on Electrostatic Potential for Methyl Orange Dye

Haider Shanshool Mohammed

Pages: 38-43 English

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Abstract

In the current study, the effect of the immobilization on electrostatic potential, pH and the absorbance of
aqueous solutions of methyl orange that was immobilized on a modified chitosan polymer by glass wool were studied.
It was found that the values of these parameters of the supported methyl orange are increased compared to unsupported
samples. Furthermore, the electrostatic potential of the supported methyl orange is investigated in the presence of an
aqueous solutions of NaCl, where showed the value of the electrostatic potential is raised With increasing ionic strength
of the sodium chloride solution and a decrease in the value of pKa to the methyl orange dye after immobilization while
the results are inversely before immobilization methyl orange on a modified chitosan polymer by glass wool.

Keywords

chitosan electrostatic pote ntial Immobilization methyl orange dye

7

Data Security Using Homomorphic Encryption for Cloud Based Medical Record Management System

Mustafa Abdalrassual Jassim

Pages: 44-51 English

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8

Synthesis Of New Azomethine Dyes

Ali Ghazi Kazim

Pages: 52-60 English

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Abstract

The research includes the preparation of new azoketimines dyes by means of the coupling reaction of the schiff bases with various phenolic compounds . The prepared derivatives were diagnosed using infrared techniques, NMR proton, ultraviolet-visible radiation and thin-layer chromotography.

Keywords

Azo dyes azomethine coupling reaction Schiff base

9

Integrated Wireless Technologies with Computer for Industrial Machinery Fault Diagnosis: Challenges Comparison and Characteristics: A Review

Moneer Ali Lilo1,*, Auda Raheemah Odhaib2, Abdelkrim K. Ilijanb3

Pages: 56-75 English

Full Text Issues

Abstract

Condition monitoring of machinery in industries is becoming an emerging technique for efficient operations and productivity. A wide range of fault diagnosis approaches have been proposed to improve machinery operations in industries. These monitoring and fault diagnosis approaches are most effective for reliable machinery operations. However, due to the harsh environment of industries, these approaches have been suffered from different challenges. In order to extract the significant features for fault diagnosis and monitoring, different neural, fuzzy, and signal processing based systems were adopted. In this paper, we discuss wireless sensor based fault diagnosis and monitoring approaches and their types for industrial machinery. Furthermore, the paper presents industrial challenges to adopting these approaches and related efforts.

Keywords

Accuracy Fault diagnosis Fuzzy Neural Network Vibration Fault Wireless system

Muthanna Journal of Pure Science (MJPS)

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