Study the Optical properties of Poly (vinyl alcohol) Doped Cupper Chloride

Abdallh, Mustafa; Hamood, Osama; Yousif, Emad

doi:10.22401/jnus.16.1.03

Cited by 16 publications

(10 citation statements)

References 6 publications

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“…The figure shows that the transmittance increases with the increase in wavelength for all the films. It is clear that the transmittance decreased after annealing for all the films and this result is in agreement with previous reports [6][7][8]. Figure (2) shows the absorption spectra of (PVA-CuCl) films with 2 and 10 wt% concentrations of CuCl salt as a function of the wavelength before and after annealing.…”

Section: -Results and Discussionsupporting

confidence: 91%

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Effect of Annealing on the Optical Properties of (PVA-CuCl) Composites

Salman

Bakr

Jwameer

2016

ILCPA

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ABSTRACT. Films of polymer (polyvinyl alcohol (PVA)) doped with CuCl salt at different concentrations (2 and 10) wt% were prepared using casting technique. The optical properties of the films were studied after annealing. The transmission and absorption spectra have been recorded in the wavelength range of (300-1100) nm. The effect of annealing on the optical properties for (PVACuCl) films with different concentrations (2 and 10) wt% of copper chloride salt shows that the transmittance decreased after annealing for all the films. The optical constants (absorption coefficient, refractive index, extinction coefficient, real and imaginary parts of dielectric constant) for all the films are affected by annealing. The energy gap (E g ) of all the films decreased after annealing. 1-INTRODUCTIONPolymers have existed in natural form since life began and those such as DNA, RNA, proteins and polysaccharides play crucial roles in plant and animal life. From the earliest times, man has exploited naturally-occurring polymers as materials for providing clothing, decoration, shelter, tools, weapons, writing materials and other requirements [1].The properties of polymer-mineral reinforced composites are determined by the component properties (particle shape, surface area, surface chemistry, polymer microstructure) and by the preparation method and processing conditions as well. Among of preparation methods, injection molding has strong influence on the internal microstructure of polymers and in a consequence on mechanical response of the material [2]. Nowadays, thermoplastic polymers are widely used in various aspects of human society. They have several good properties such as good chemical resistance, better mechanical properties, cost effectiveness; that make them the polymers of choice for numerous applications. Due to superior properties of these materials, they have been used mixed with natural fillers and in manufactured composite forms as well. The use of thermoplastic polymer composites reinforced with natural fillers has been rapidly increasing in the automotive industry [3].Polyvinyl alcohol (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 in many biomaterial applications [4]. Doping of polymers attracted the scientific and technological researchers, because of their wide applications. The dopants in polymer can change the molecular structure and hence the microstructure as well as the macroscopic properties of the polymer [5]. 2-MATERIALS AND METHODSThe materials used in this work were as a powder of polymer (polyvinyl alcohol (PVA)) doped by copper chloride CuCl salt with weight percent (2 and 10) wt%. It was dissolved in (15 ml) of distilled water in glass beaker by using magnetic stirrer for about (45 minute) and placed in Petri dish (5 cm diameter) using casting technique to prepare the films. The thickness of the dried films is (45 µm) measured by digital micrometer....

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Section: -Results and Discussionsupporting

confidence: 91%

“…This behavior is similar to (n) and (k) because (ε 1 ) depends on (n 2 ) due to low value of (k 2 ), while (ε 2 ) is dependent on (k) value which depends on the (α). The real and imaginary parts of dielectric constant indicate the same pattern and the values of real part are higher than the values of imaginary part [6,8]. …”

Section: -Results and Discussionmentioning

confidence: 80%

Effect of Annealing on the Optical Properties of (PVA-CuCl) Composites

Salman

Bakr

Jwameer

2016

ILCPA

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Section: Optical Properties Of the Polymersupporting

confidence: 93%

“…This behavior is similar to (n) and (k) because ( ) depends on ( ) due to low value of ( ), while ( ) is dependent on (k) value which depends on the (α). The real and imaginary parts of d ielectric constant indicate the same pattern and the values of real part are higher than the values of imaginary part [13,14].…”

Section: Figure (3)mentioning

confidence: 76%

Study of Some physical properties of (PVA-CuCl) composite films

Kuekha

Salman

Ahmed

2019

Journal of Garmian University

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Introduction The study of composite materials, i.e., mixtures consisting of at least two phases of different chemical compositions, has been of great interest fro m both fundamental and practical standpoints. The macroscopic physical p roperties of such materials can be co mbined so as to produce materials with a desired average response. [1]. The properties of poly me r-mineral reinforced composites are determined by the co mponent properties (particle shape, surface area, surface chemistry, poly mer microstructure) and by the preparation method and processing conditions as well. A mong of preparation methods, injection mo lding has strong influence on the internal microstructure of polymers and in a consequence on mechanical response of the material [2]. Doping of poly mers attracted the scientific and technological researchers , because of their wide applications. The dopants in polymer can change the molecular structure and hence the microstructure as well as the macroscopic properties of the polymer [3]. Po lyvinyl alcohol (PVA), which is essentially made fro m polyvinyl acetate through hydrolysis, is easily degradable by bio logical organis ms and in water is a solubilized crystalline structure polymer [4]. PVA is formed by the polymerizat ion of vinyl acetate, which is then hydrolyzed into PVA. Fig. 1 shows the chemical structure of PVA. The excellent chemical resistance and physical p roperties of PVA resins have led to broad industrial use [5]. PVA is a low cost hydrophilic poly mer and therefore swells in the presence of water or bio logical flu ids to form hydrogels. This property is particularly useful because it can allow for the release of drugs incorporated into these hydrogels. Since PVA has a high selectivity of water to alcohols, it exhibits low methanol permeab ility and has been used in some alkaline fuel cell [6-7]. PVA is an artificial polymer that has been used during the first half of the century worldwide. It has been applied in the industrial, co mmercial, med ical, and food sectors and has been used to produce many end products, such as lacquers, resins, surgical threads, and food packaging materials that are often in contact with food [8]

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“…(2). The observed behavior suggests allowed direct transition for amorphous material [14][15][16][17][18]. The values of optical energy gap Eopt.…”

Section: Resultsmentioning

confidence: 82%