Synthesis, Characterization and Properties of Poly (ε-Caprolactone) Glycol Based Casting Polyurethane Elastomers Containing Nano-Size Sio₂ Particles

Abstract:

Poly(ε-caprolactone) (PCL) glycol based casting polyurethane elastomers (CPUE) filled with nano-SiO2 particles within different surface properties were synthesized by mean of in-situ polymerization. The macro-static/dynamic mechanical properties and micro-dispersed state were characterized by an electronmechanical universal testing machine, a durometer, a rubber resilience experimental machine, a dynamic-mechanical analyzer (DMA) and a scanning electron microscope (SEM). The tensile modulus at 100% and 300%, elongation at break, tensile strength and tear strength of PCL urethane nanocomposites increased substantially in the presence of a certain amount of nano-SiO2 compared with their pristine state. Furthermore, the tensile strength and tear strength at 100 of the PCL CPUE with 5% nano-SiO2 pretreated by γ-glycidochloropropyl methyl trimethoxy silane (SI-CA) were 1.50 and 1.94 times than those of the pure PCL CPUE, respectively. The addition of the nano-SiO2 had little effect on the hardness, but the impact resilience decreased slightly. DMA analyses showed that the loss factor peaks of two nano-SiO2 polyurethane composites were higher obviously than the pure PCL CPUE and the glass transition temperature （Tg）of the two nano-SiO2 polyurethane composites increased to higher temperature region. SEM fractographs showed that the surface treatment by the optimum silane coupling agent influenced the dispersibility of nano-SiO2 in the PCL CPUE distinctly. The agglomerating phenomenon, and even some nano-agglomerates with more than 1 μm diameter can be observed in the PCL CPUE with 5% untreated nano-SiO2, but the nano-SiO2 pretreated by SI-CA was dispersed in the PCL CPUE in nano-scale.

• Periodical: Advanced Materials Research (Volumes 148-149)
• Pages: 1394-1399
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.148-149.1394
• Online since: October 2010
• Authors: Xiao Dong Chen, Tie Jun Ma, Hai Zhang, Rong Sheng Chen
• Keywords: Casting Polyurethane Elastomer, Characterization, In Situ Polymerization, Nano-SiO₂ Particle, Poly(ε-caprolactone) Glycol, Synthesis

References

[1] S. Solarski, S. Benali, M. Rochery, E. Devaux, M. Alexandre, F. Monteverde and P. Dubois: J. Appl. Polym. Sci. Vol. 95(2005), p.238.

DOI: 10.1002/app.21254

[2] J. Njuguna, K. Pielichowski and S. Desai: Polym. Adv. Technol. Vol. 19(2008), p.947.

[3] S. Chandralekha, C. B. Anna: Polym. Int. Vol. 49(2000), p.469.

[4] V. V. Ginzburg, A. C. Balazs: Adv. Mater. Vol. 12(2000), p.1805.

[5] E.P. Giannelis: Appl. Organomet. Chem. Vol. 12(1998), p.675.

[6] X. Kornmann, L. A. Berglund, J. Sterte and E.P. Giannelis: Polym. Eng. Sci. Vol. 38(1998), p.1351.

[7] K. Yano, A. Usuki, A. Okada, T. Kurauchi and O. Kamigaito: J. Polym. Sci., Part A: Polym. Chem. Vol. 31(1993), p.2493.

DOI: 10.1002/pola.1993.080311009

[8] J.G. Zhang, D.D. Jiang, D.Y. Wang and C. A. Wilkie: Polym. Adv. Technol. Vol. 16(2005), p.800.

[9] P.B. Messersmith, E.P. Giannelis: J. Polym. Sci., Part A: Polym. Chem. Vol. 33(1995), p.1047.

[10] A.K. Giri: Adv. Mater. Vol. 9(1997), p.163.

[11] J.R. Zheng, R. Ozisik and R.W. Siegel: Polymer. Vol. 47(2006), p.1.