EFFECT OF INCREASING NCO/OH MOLAR RATIO ON THE CHEMICAL AND MECHANICAL PROPERTIES OF ISOCYANATE TERMINATED POLYURETHANE PREPOLYMER DERIVED FROM BIO-MASS
AbstractThe study deals the effect of increasing NCO/OH molar ratio on the physico-mechanical properties of isocyanate terminated polyurethane prepolymer. The prepolymer was prepared using castor oil and toluene-2,4-diisocyanate. The NCO/OH molar ratio has been varied from 1.6 to 2.0. The formation of the prepolymer was confirmed by UV and FTIR spectroscopy. The results reveal that the curing time of the prepolymer decreased with increase in NCO/OH molar ratio. When NCO/OH molar ratio increased, the tensile strength of the polyurethane film increased, while percent elongation decreased due to increase in hard segment content.
2. C. Nevin, B. Moser, J. Appl. Polym. Sci., 7, 1963.
3. K.Chandrashekhara a,., S. Sundararaman a, V. Flanigan a, S. Kapila, Materials Science and Engineering A 412 2–6Affordable composites using renewable materials, 2005.
4. N. Karak, S. Rana, J.W. Cho, J. Appl. Polym. Sci,. 112, 736–743, 2009.
5. C. J. Knill and J. F. Kennedy, “Biotechnology and Polymers”, Edited by Charles G.Gebelein Plenum Press, New York, 1993.
6. L. W. Barrett, O. L. Shaffer and L. H. Sperling, J. Appl. Polym. Sci., 48, 953-968, 1993.
7. Sperling L.H,” Interpenetrating Polymer networks and related materials plenum press new York, 1981.
8. RunumiGogoi, M. SarwarAlam and Rakesh Kumar Khandal , “Effect of increasing NCO/OH molar ratio on the physicomechanical and thermal properties of isocyanate terminated Sciences, 3 (2), 118-123, 2014.
9. V.VGite P PMahulikar D G Hudiwale and U R Kapadi, Journal of Scientific and industrial research, 63, 348-354, 2004.
10. VincentDarras A, OdileFichet A, Franc¸oise Perrot A, Sylvie Boileau B, Dominique Teyssie A, React Funcpolym, 66, 585–591, 2006.
11. Liu CJ, Hsieh KH, Ho KS, Hsieh TT., J Biomed Mater Res., 34, 261–268, 1997.
12. Petrini P, Fare S, Piva A, Tanzi MC., J Mater Sci Mater Med., 14, 683–686, 2003.
13. Pennings AT, Knol KE, Hoppen HJ., Colloid Polym Sci., 268, 2–11, 1990.
14. David Jones S, David McLaughlin WJ, Colin Mc Coy P., Biomaterials, 26, 1761–1770, 2005.
15. Dror M, Elsaber MZ, Berry GC., J Appl Polym Sci., 26, 1741–1757, 2003.
16. Fangxing LI, JuZuo, Limer Dong, Hong Jun Wang., J Eur Polym., 34, 59–66, 1998.
17. P Mallu, Siddaramaiah and R.Somashekar, Bull. Mater. Sci., 23, 413–418, 2000.
18. K Prasantha, K vasanthakumarpai, B sherigara., Bull. Mater.Sci., 24, 535–538, 2001.
19. Mayur Patel and Bhikhu Suthar, Polymer Journal., 20, 1-8, 1988.
20. C Sanmathi, S Prasannakumar and BS Sherigara, Bull.Mater. Sci., 27, 243–249, 2004.
21. Suman Thakur, NiranjanKarak, Progress in organic coatings, 76, 157-164, 2013.
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