Abstract
Transparent poly(trimethylhexamethyleneterephthalamide) based titania nanocomposites were prepared by the in-situ generation of inorganic network structure via the sol-gel process. Different concentrations of tetrapropylorthotitanate (TPOT) were added to the polyamide solution dissolved in anhydrous dimethylforamide (DMF). After thorough mixing, TPOT was hydrolyzed and condensed to produce titania network in the matrix using diethylamine as catalyst. Thin and transparent composite films with various amounts of titania were cast by solvent elution technique. These films were subjected for their optical, mechanical, thermal and morphological analyses. Tensile strength of the films was found to increase with increase in titania concentration relative to pure polymer and maximum strength was obtained for 5–wt% titania, but elongation at break was observed to decrease sharply on addition of titania. Dynamic mechanical thermal analysis (DMTA) carried out on the samples showed a systematic increase in the glass transition temperature, i.e., 101 °C with pure polyamide to 155 °C with composites containing 10-wt% titania contents. The storage modulus was also found to increase with increase in titania contents in the matrix. The decrease in the storage modulus of the hybrids with rise in temperature was observed to be much smaller as compared to that of pure polymer. Thermal decomposition temperatures of the hybrids were found in the range of 450–500 °C. The weights of the residues left at 700 °C were nearly proportional to the titania contents in the original hybrids. SEM observations indicated titania network structure dispersion at nanometer-level in the matrix.
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References
Brinker CJ, Scherer GW (1990) Sol–gel science: the physics and chemistry of sol–gel processing. Academic Press, Boston
Hench LL, West JK (1990) Chem Rev 90:33
Mark JE (1992) J Appl Polym Sci Appl Polym Symp 50:273
Mark JE (1991) J Inorg Organomet Polym 1:431
Schmidt H (1994) J Sol–Gel Sci Technol 1:217
Betrabet SC, Wilkes GL (1994) J Inorg Organomet Polym 4:343
Schmidt H, Kasemann R, Burkhart T, Wagner G, Arpac E, Geiter E (1995) In: Mark JE, Lee CY-C, Bianconi PA (eds) Hybrid organic–inorganic composites. ACS Symp Ser 585, Washington, DC, p 331
Gaw K, Suzuki H, Kakimoto M, Imai Y (1995) J Photopolym Sci Technol 8:307
Kita H, Saiki H, Tanaka K, Okamoto K (1995) J Photopolym Sci Technol 8:315
Mark JE, Wang S, Ahmad Z (1995) Macromol Chem Symp 98:731
Cassidy PE (1980) Thermally stable polymers. Marcel Dekker, New York
Crichley JP, Knight GJ, Wright WW (1983) Heat resistant polymers. Plenum Press, New York
Morgan PW (1963) J Polym Sci Part C 4:1075
Wolfe JF (1987) Enycl Polym Sci Eng 3:635
Wang S, Ahmad Z, Mark JE (1993) Polym Bullet 31:323
Ahmad Z, Wang S, Mark JE (1993) ACS Div Polym Chem Polym Prepr 34(2):745
Ahmad Z, Wang S, Mark JE (1994) In: Sanchez C, Brinker CJ, Mecartney ML, Cheetham A (eds) Better ceramics through chemistry, Part VI. Material research society, Pittsburgh
Ahmad Z, Sarwar MI, Mark JE (1997) J Mater Chem 7(2):259
Ahmad Z, Sarwar MI, Mark JE (1997) J Appl Polym Sci 63:1345
Ahmad Z, Sarwar MI, Krug H, Schmidt H (1997) Int J Polym Mater 39:127
Ahmad Z, Sarwar MI, Wang S, Mark JE (1997) Polymer 38(17):4523
Ahmad Z, Sarwar MI, Mark JE (1998) J Appl Polym Sci 70:297
Asif KM, Sarwar MI, Rafiq S, Ahmad Z (1998) Polym Bullet 40:583
Rehman HU, Sarwar MI, Ahmad Z, Krug H, Schmidt H (1997) J Non-Cryst Solids 211:105
Sarwar MI, Ahmad Z (1997) Adv Mater 97:73
Ahmad Z, Sarwar MI, Krug H, Schmidt H (1997) Die Angew Makromol Chemie 248:139
Wang S, Ahmad Z, Mark JE (1994) Polym Mater Sci Eng 70(1):305
Wang S, Ahmad Z, Mark JE (1994) Macromol Reports 31:411
Ahmad Z, Wang S, Mark JE (1994) Polym Mater Sci Eng 70(1):425
Wang S, Ahmad Z, Mark JE (1994) Chem Mater 6:943
Ahmad Z, Wang S, Mark JE (1994) Polym Mater Sci Eng 70(1):303
Chen JP, Ahmad Z, Wang S, Mark JE, Arnold FE (1995) In: Mark JE, Lee CY-C, Bianconi PA (eds) Hybrid organic–inorganic composites. ACS Symp Ser 585, Washington, DC, pp 297
Ahmad Z, Wang S, Mark JE (1995) In: Mark JE, Lee CY-C, Bianconi PA (eds) Hybrid organic–inorganic composites. ACS Symp Ser 585, Washington, DC, pp 291
Rodrigues DE, Brennan AB, Betrabet C, Wang B, Wilkes GL (1992) Chem Mater 4(6):1437
Mascia L, Kioul A (1994) J Mater Sci Lett 13(9):641
Suzuki F, Onozato K, Kurokawa Y (1990) J Appl Polym Sci 39:9371
Kakimoto M, Iyoku Y, Morikawa A, Yamaguchi H, Imai Y (1994) ACS Div Polym Chem Polym Prepr 35(1):393
Acknowledgements
Special thanks are due to Professor Dr. Gerhard Wegner and Dr. Ingo Lieberwirth of Max Planck Institute for Polymer Research, Mainz, Germany, for providing the SEM measurement facility.
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Sarwar, M.I., Zulfiqar, S. & Ahmad, Z. Preparation and properties of polyamide–titania nanocomposites. J Sol-Gel Sci Technol 44, 41–46 (2007). https://doi.org/10.1007/s10971-007-1591-1
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DOI: https://doi.org/10.1007/s10971-007-1591-1