Sikandar.pptx in hazara university mansehra

for mphil in polymers

1. By Sikandar Iqbal Dr . Basit Niaz Assistant Professor Deptt . Of Chemistry Hazara university Mansehra

2. PRESENTATION OUTLINE INTRODUCTION AIM & OBJECTIVES METHODOLOGY CHARACTERIZATION TECHNIQUES

3. INTRODUCTION

4. INTRODUCTION Definition : A polymer is a large molecule ( macromolecule ) composed of repeating structural unit connected by c ovalent chemical bonds . - The word is derived from the Greek words ( poly ), meaning "many"; and ( meros ), meaning "part" Example:- Butadiene, poly-vinyl-chloride etc. - They are complex and giant molecules and are different from low molecular weight compounds. -`Macro-molecules’ are made up of much smaller molecules.

5. The word, polymer , implies that polymers are constructed from pieces ( monomers ) that can be easily connected into long chains ( polymer ). When you look at the above shapes, your mind should see that they could easily fit together. Polymer monomers

6. Polymer Nano -composites The addition of nano filler to a polymer matrix is called polymer nano composite. These nano fillers enhance the properties of a polymer in very dramatic way.

7. Smaller Filler Size High surface to volume ratio Mechanical Properties Increased ductility with no decrease of strength Thermal Properties Possess excellent thermal properties Optical Properties Light transmission characteristics depend on plastic size

8. Automobiles Aerospace Injection Molded Products Coatings, Adhesives Fire-retardants Packaging Materials Drug Delivery Lightweight composites.

9. Polyurethanes Polyurethane are plastic polymers synthetic resin made by joining diisocynates (or polymeric isocyanate ) and polyols (an alcohol with more than two reactive hydroxyl groups per molecule) in the presence of an appropriate catalyst or additive

10. Polyurethanes are much more than just foam PU’s can be Elastomers Paints Adhesives Fibers

11. It is an aromatic polymer which is formed by the monomer called styrene. It is a hard inexpensive plastic having low melting point manufactured from non renewable fossil fuels and synthetic chemicals.

12. The objective of this study is to functionalization of a polymer to develop a system of enhanced properties which will fulfill the requirement in different applications. Polyurethane will be synthesized by adjusting their polyols and diisocyante ratios for film casting. The structures of the designed polymer will be verified with FT-IR analyses. Polyurethane will than merge with functionalized polymer ( Styrenebutadiene styrene) and their interaction will be studied by making their composites with multiwalled nano carbon tubes . If time allowed than synthesized Material will be tested for their tensile properties, dynamic mechanical properties, thermal and heat bearing properties .

13. CHARACTERIZATION TECHNIQUES Rutherford Back Scattering (RBS) Scanning Electron Microscopy (SEM) Thermo Gravimetric Analysis (TGA) Energy Dispersive Spectroscopy (EDX) Fourier Transform Infrared Spectroscopy (FTIR) Nuclear Magnetic Resonance (NMR)

14. THANKS FOR YOUR PATIENCE