IJSTR

International Journal of Scientific & Technology Research

IJSTR@Facebook IJSTR@Twitter IJSTR@Linkedin
Home About Us Scope Editorial Board Blog/Latest News Contact Us
CALL FOR PAPERS
AUTHORS
DOWNLOADS
CONTACT
QR CODE
IJSTR-QR Code

IJSTR >> Volume 4 - Issue 6, June 2015 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Studies On The Synthesis And Reaction Of Silicone Anhydride Dendrimers And Thermal Properties Of Their Imides

[Full Text]

 

AUTHOR(S)

Sangeeta Kandpal, A. K. Saxena

 

KEYWORDS

KEYWORDS: dendrimers; hydrosilation; Speier’s catalyst; imidization; T.G.A.

 

ABSTRACT

Abstract: Dendritic silicone core polyimides have been synthesized using silicone anhydride dendrimers which inturn were synthesized by the hydrosilation reaction of maleic anhydride with Si-H terminated silicone dendrimers in presence of Speier’s catalyst. The anhydride groups were converted to imide functionality by the reaction of aromatic diamines at elevated temperatures. All the products were characterized by usual physico-chemical method i.e. elemental analysis, FT-IR and 1H- NMR spectroscopy. The molecular weights of dendrimers were determined by using vapor pressure osmometry. The dendritic polyimides have shown fairly good solubility in polar aprotic solvents e.g. N, N-dimethylacetamide (DMAc), N, N-dimethylformamide (DMF), N methyl-2 pyrrolidone (NMP) etc. Thermal studies (TGA & DSC) of these compounds have also been studied under inert atmosphere which have shown high char yield (~ 65% at 800 ºC) and thermal stability above 400 ºC. The glass transition temperature of these imides was found in the range of 170-190 ºC.

 

REFERENCES

[1] Sroog, C.E. Polyimides. In, Prog Polym Sci. 1991, 16, 561-694.

[2] Mittel K.L. Polyimides and Other High Temperature Polymers, VSP Publishers: Holland. Ed. 2003, Vol. 2.

[3] Ahmad Z. The Encyclopedia of Materials: Science and Technology, Section 5, Elsiever Science: 2001, London Chapter 10.

[4] Wilson D.; Stenzeberger H.D.; Hergenrother P.M. Polyimides, Chapman and Hall, New York 1990.

[5] Sroog C.E. Prog. Polym. Sci. 1991, 16, 561.

[6] Butkas L.M.; Mathern P.D.; Johnson W.S. J. Adhesion 1998, 66, 251.

[7] Verbicky J.W. Jr. Polyimides, in Polymers: High Performance Polymers and Composites (Kroschwitz JI, ed.), John Wiely and Sons, Inc., 1991, 777.

[8] Bruma M., Schulz B. J. Macromol. Sci. Polym. Rev. 2001, 41, 1.

[9] Hamciuc E.; Hamciuc C.; Sava I.; Bruma M. Eur. Polym. J. 2001, 37, 287.

[10] Jadhav A.S.; Maldar N.N.; Shinde B.M.; Vernekar S.P. J. Polym. Sci. Part A: Polym. Chem. 1991, 29, 147.

[11] Special Issue on Organic-Inorganic Hybrid Nanocomposites Materials. Chem. Mater. 2001, 13, 3059.

[12] Ghosh A.; Banerjee S.;, Komber H.; Schneider K.; Haubler L.; Voit B. Eur. Polym. J. 2009, 45, 1561.

[13] Srividhya M.; Madhavan K.; Reddy B.S.R. Eur. Polym. J. 2006, 42, 2743.

[14] Deligoz H.; Yalcinyuva T.; Ozgumus S.; Yildirim S. Eur. Polym. J. 2006, 42,1370.

[15] Shu W. J.; Ho J.C.; Perng L.H. Eur. Polym. J. 2005, 41, 149.

[16] Simionescu M.; Marcu M.; Cazacu M. Eur. Polym. J. 2003, 39, 777.

[17] Raju M.P.; Alam S. J. Therm. Anal. Calorim 2008, 91, 401.

[18] Arnold C.A.; Summers J.D.; Chen Y.P.; Bott R.H.; Chen D.; McGrath J.E. Polymer 1989, 30, 986.

[19] Yilgor I.; Spinu M. ACS polym. Prepr. Am. Chem. Soc. Div. Polym. Chem. 1987, 27, 84.

[20] Yiligor I.; McGrath J.E. Adv. Polym. Sci. 1988, 86, 1.

[21] Nagase Y.; Mori S.; Egawa E.; Matsui K. Macromo. Chem. Rapid. Commun. 1990, 11, 185.

[22] Itoh M.; Mita I. J Polym Sci Part A: Polym Chem 1994, 32, 1581–92.

[23] Kandpal S.; Saxena A.K. Eur Polym J 2014, 58, 115-124.

[24] Vogel A.I. Practical Organic Chemistry, 3rd edn. Longman, London 1971.

[25] Speier J.L.; Webster J.A.; Barnes G.H. J. Am. Chem. Soc. 1957, 79, 974- 979.

[26] Brink M.H.; Brandom D.K.; Wilkes G.L.; McGrath J.E. Polymer 1994, 35, 5018.

[27] Bell V.L.; Stump B.L.; Gager H. J Polym Sci 1976, 12, 2275.

[28] Brandom D.K.; Wilkes G.L. Polymer 1994, 35, 5672.

[29] Woodward M.H.; Rogers M.E.; Brandom D.K.; Wilkes G.L.; McGRath J.E. Polym Prepr 1992, 33(2), 333.