NANOPARTICLES Their application in probing Glass Transition Temperature of Polymers.

1. NANOPARTICLESTheir application in probing Glass Transition Temperature of Polymers. By RATANKISHORE PUTLA Mechanical & Aerospace Engineering Oklahoma State University

2. QUICK OVERVIEW • FEW DEFINITIONS • MY RESEARCH • CONCLUSION

3. DEFINITIONS • NANOPARTICLES • 1 Nanometer (nm) = 10 -9 Meter • Particles whose dimensions are of the order of ‘nm’ • GLASS TRANSITION TEMPERATURE (Tg)

4. MY FIELD OF RESEARCH • PROBING THE GLASS TRANSITION TEMPERATURE OF A POLYMER BY EMBEDDING METAL NANOPARTICLES • IMPORTANT THINGS INVOLVED • POLYMER • NANOPARTICLE • RAMAN SPECTROSCOPY

5. NANOPARTICLES • GOLD NANOPARTICLES (Au)

6. THIN FILM OF POLYSTYRENE PREPARED BY SPIN COATING POLYMER USED

7. RAMAN SPECTROSCOPY THE RAMAN SPECTROMETER

8. Intensity Vs Wave number Peak shift Peak values Vs Temperature CALCULATION OF “Tg”

9. CONCLUSION • NANOPARTICLES HELPS IN FINDING THE GLASS TRANSITION TEMPERATURE OF POLYSTYRENE.

10. REFERENCES • Macromolecules - V.Zaporojtchenko et al. • Direct Imaging of Nanoparticle Embedding to probe viscoelasticity of polymer surfaces – J.H.Teichroeb et al. • Investigation of Surface Glass Transition Temperature by embedding of Noble Metal Nanoclusters into Monodisperse Polystyrenes – Jorn Erichsen et al. • Nanosphere Embedding into Polymer Surfaces : A Viscoelastic Contact Mechanics Analysis – Hutcheson et al. • Tuinstra, F. & Koenig, J. L. 1970. Raman Spectrum of Graphite. Journal of Chemical Physics 53(3), 1126-1130.

11. ANY QUESTIONS PLEASE ?

12. THANK YOU VERY MUCH….RATAN KISHORE PUTLA.