International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
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Miscibility and Thermal Study of PVA/Chitosan/Papaya Latex Blend Films Chougale Ravindra B.1*, Masti Saraswati P2., Mudigoudra Bhagyavana S3., Kasai Deepak R4 1*P.
G. Department of Studies in Chemistry, Karnatak University, Dharwad - 580 003, Karnataka, India. 2 Department of Chemistry, Karnatak Science College, Dharwad - 580 001, Karnataka, India. 3 Department of Computer Science, Maharani Science College for Women, Bangalore, Karnataka, India. 4 Department of Materials Science, Mangalore University, Mangalgangotri - 574 199, Karnataka, India. ------------------------------------------------------------------***-------------------------------------------------------------------------
Abstract: Different weight percent of ternary PVA/Chitosan/Papaya latex blend films were prepared by solvent evaporating technique. The glass transition temperature and thermal stability of blend films were investigated using differential scanning calorimetry and thermogravimetric analysis. Fourier transform infrared studies reveal the formation of hydrogen bond. The miscibility of various wt % of papaya latex incorporated blend films were carried out using scanning electron microscopy. Scanning electron microscope micrographs for the blend system showed good miscibility among the blend components. The tensile strength increases with increase in wt % of papaya latex and then decreases. Key Words: Papaya latex, thermal properties, glass transition. 1. INTRODUCTION Biomaterials for control drug release and food packaging have gained much interest to develop and modify the polymeric materials to meet desired property [1]. In this context, many types of synthetic and natural polymers have been prepared and subjected to the various applications. The miscibility between the components of polymer mixture is major factor in the development of new polymer material with desired property. In search of new polymeric materials researchers have paid much attention to the study of polymer blending [2-6]. Polymer blending is easy and inexpensive [7] method for modifying properties of polymers. Blending of natural polymer with synthetic which is application oriented lead to the pollution free and biodegradable materials [8-12]. Chitosan is a by-product obtained by deacetylation of chitin [13]. It is a cationic polysaccharide with high molecular mass, good film forming ability and antimicrobial activity. Chitosan it is one of the abundant, renewable, biodegradable carbohydrate polymer. Chitosan is known have various biological activities [14-16]. On the other hand poly (vinyl alcohol) is studied extensively because of its physical properties which are arising from the presence of –OH groups and the hydrogen bond formation [17]. The blends of poly (vinyl alcohol) with chitosan have attracted much commercial interest. On review of literature on polymer blend we came to know that blending of Chitosan with poly (vinyl alcohol) has been already reported in literature [18-23]. Therefore, this study was undertaken to determine the effect of papaya latex on PVA/chitosan blend films and to investigate their morphology, miscibility, stability, interaction and mechanical properties. 2. EXPERIMENTAL METHODS 2.1 Materials Chitosan was supplied by Tokyo Chemical Industry (TCI) Tokyo, Japan (CAS 9012-76-4) and Poly (vinyl alcohol) (PVA) was procured from central drug house (CDH), New Delhi. Papaya latex was purchased from Sisco Research Laboratories Pvt, Ltd, Mumbai, India. 2.2 Preparation of Blend Films Ternary polymer blends films containing PVA/chitosan/papaya latex of different compositions were prepared by solution casting method. For the preparation of blend films, exactly weighed amount of two different polymers and papaya latex were dissolved separately. Chitosan solution was prepared in 2% acetic acid and poly (vinyl alcohol) and papaya latex solution was made in distilled water. After allowing those to dissolve, the three solutions were mixed with continuous
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