Preparation of (PVA-AlCl3.6H2O) Composites and Study Optical properties
(1)Bahaa H. Rabee, (2) Majeed Ali Habeeb, (3)Ahmed Hashim and (4)Rawaa Mizher
(1,2,3)Babylon University, College of Education , Department of physics, Iraq.
(4)Babylon University, College of Science , Department of physics, Iraq.
E-Mail: majeed_ali74@yahoo.com
E-Mail: ahmed_taay@yahoo.com
Abstract
The purpose of the study effect of addition AlCl3.6H2O on optical properties of solution consisting of poly-vinyl alcohol(PVA) and AlCl3.6H2O. The samples were prepared by adding AlCl3.6H2O to the solution of poly-vinyl alcohol with weight percentages from AlCl3.6H2O are(0,4,6,8)wt.%. Results show that the absorbance of composites increases with increase the concentration of AlCl3.6H2O, refractive index real part of dielectric constant, Berwster angle and coefficient of finesses are increasing with increase weight percentages of AlCl3.6H2O .
keywords: optical properties, poly-vinyl alcohol, composites.
Introduction
The properties of polymer-mineral reinforced composites are determined by the component properties (particle shape, surface area, surface chemistry, polymer microstructure) and as well as by the processing method and processing conditions. Among of processing methods, injection molding has strong influence on the internal microstructure of polymers and in a consequence on mechanical response of the material. Final properties of the thermoplastic composites are also caused by the particle filler shape (platelet, fibrous or irregular) and its orientation formed during polymer melt flow[1]. PVA is a water-soluble synthetic polymer. Due to the characteristics of easy preparation, good biodegradability, excellent chemical resistance, and good mechanical properties, PVA has been used on many biomaterial applications[2]. This present work deals with results of the effect of AlCl3.6H2O on optical properties of polyvinyl alcohol.
Materials and Methods
The materials used in this paper are polyvinyl alcohol and AlCl3.6H2O. The weight percentages of AlCl3.6H2O are (0,4,6 and 8)wt.%. The samples were prepared by dissolved AlCl3.6H2O in 30 mL of a 3% solution of PVA. The transmission and absorption spectra of PVA- AlCl3.6H2O composites have been recording in the length range (190-850) nm using double-beam spectrophotometer (UV-210oA shimedza ).
Results and Discussion
Figure(1) shows the optical absorbance as a function of the wavelength of composites. The figure indicate the fact that the absorbance increases by adding different weight percentages of AlCl3.6H2O, this related to absorbance of AlCl3.6H2O.
The behavior of refractive index of composites with photon energy of (PVA- AlCl3.6H2O) composites is shown in figure(2). The figure shows that the refractive index of (PVA- AlCl3.6H2O) composites increases with increase the AlCl3.6H2O concentrations, this behavior attribute to increase of the density with increase the concentration of AlCl3.6H2O [3].
The behavior of real part of dielectric constant ( ?1=n2)[8] with energy photon of composites are shown in figure(3).
The figure shows that the real part of dielectric constant of (PVA- AlCl3.6H2O) composites increases with increase the AlCl3.6H2O weight, this behavior attribute to increase the refractive index with increase the weight percentages of AlCl3.6H2O [4].
The behavior of Berwster angle( )[5] with photon energy is shown in figure(4).This figure shows the Berwster angle of (PVA- AlCl3.6H2O) composites increases with increase concentration of AlCl3.6H2O. The increase of Berwster angle with concentration of AlCl3.6H2O related to increase refractive index.
The variation of coefficient of finesses[ where R is reflectance][6] with photon energy of different concentrations of AlCl3.6H2O. The coefficient of finesses increased with increase AlCl3.6H2O concentration. This behavior attribute to increase refractive index.
Conclusions
1- The absorbance of (PVA- AlCl3.6H2O) composites increases with increase of weight percentages of AlCl3.6H2O.
2- The refractive index, real part of dielectric constant, Berwster angle and coefficient of finesses of (PVA- AlCl3.6H2O) composites are increasing with increase concentration of AlCl3.6H2O.
References
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[5] Danial and Alberty, (1975) "Physical Chemistry", 4th Edition, John, W. and Sons, Inc, 44-94.
[6] Garl zesis. (1985) "Operating Instruction Abbe-Refroctometer". West Germany oberkochn, 3-25.