Optical Properties of (PVA-CrCl₂) Composites

 ¹⁾Ahmed Hashim, ⁽²⁾Bahaa H. Rabee ,⁽³⁾ Majeed Ali Habeeb, ⁽⁴⁾Nahida Abd-alkadhim,                    ⁽⁵⁾Athraa Saad

^(1,2,3)Babylon University, College of Education , Department of physics,  Iraq.

          ⁽⁴⁾Babylon University, College of Science , Department of chemistry,  Iraq.

                                    ⁽⁵⁾Babylon University, Enjineering Affairs,  Iraq.                  

E-Mail: ahmed_taay@yahoo.com

Abstract

           The purpose of this  paper, study the  effect of  addition Krum chloride on optical properties of polyvinyl-alcohol . The composites prepare by casting technique with different weight percentages of CrCl₂ are (0,1,2,3). Results showed that the absorbance increases with increase the concentration of  CrCl₂, absorption coefficient, extinction coefficient, refractive index and real and imaginary parts of dielectric constants are increasing with increase CrCl₂ concentration.

  keywords: Polyvinyl alcohol, Optical Properties, Composites.

Introduction

         Optical properties of polymers constitute an important aspects in study of electronic transition and the possibility of their application as optical filters, a cover in solar collection, selection surfaces and green house. The information about the electronic structure of crystalline and amorphous semiconductors has been mostly accumulated from the studies of optical properties in wide frequency range. The significance of amorphous semiconductors is in its energy gap[1]. The typical advantages of organic polymers are flexibility, toughness, formability, and low density, whereas ceramics have excellent mechanical, thermal, and optical properties, such as surface hardness, modulus, strength, heat resistance, and high refractive index. The combination of organic polymers and ceramics promises new hybrid materials with high performance. Numerous technological applications have been identified for these composite materials, such as electromagnetic and radio frequency interference shielding for electronic devices (for example, computer and cellular housings), over-current protection devices, photothermal optical recording, and direction-finding antennas[2].