Abstract
The effect of carbon black (CB) and graphite (G) powders on the macroscopic and nano-scale free volume properties of silicone rubber based on poly(di-methylsiloxane) (PDMS) was studied through thermal and cyclic mechanical measurements, as well as with positron annihilation lifetime spectroscopy (PALS). The melting temperature of the composites (T m) and the endothermic enthalpy of melting (ΔH m) were estimated by differential scanning calorimetry (DSC). T m and the degree of crystallinity (χ c) of PDMS composites were found to decrease with increasing the CB content. This can be explained due to the increase in physical cross-linking which results in a decrease in the crystallite thickness. Besides, χ c was found to be dependent on the filler type. Cyclic stress-strain behavior of PDMS loaded with different contents of filler has been studied. Mullins ratio (R M) was found to be dependent on the filler type and content. It was found that, R M increases with increasing the filler content due to the increase in physical cross-linking which results in a decrease in the size of free volume, as observed through a decrease of the o-Ps lifetime τ 3 measured by PALS. Moreover, the hysteresis in PDMS-CB composites was more pronounced than in PDMS-G composites. Furthermore, a correlation was established between the free volume V f and the mechanical properties of PDMS composites containing different fillers. A negative correlation was observed between V f and R M.
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Frogley, M.D., Ravich, D. and Wagner, H.D., Compos. Sci. Technol., 2003, 63(11): 1647
Fuan, H., Jintu, F. and Sienting, L., Polym. Test., 2008, 27: 964
Thongruang, W., Ritthichaiwong, C., Bunnaul, P., Smithmaitrie, P., Chetpattananondh, K. and Songklanakarin, J. Sci. Technol., 2008, 30(3): 361
Bokobza, L., J. Appl. Polym. Sci., 2004, 93(5): 2095
Xiao, M., Sun, L., Liu, J., Li, Y. and Gong, K., Polymer, 2002, 42: 2245
Radovic, L., Walker, P. and Jenkins, R., Fuel, 1983, 62: 849
Laine, N., Vastola, F. and Walker, P., J. Phys. Chem., 1963, 67: 2030
Coltharp, M. and Hackerman, N., J. Phys. Chem., 1968, 72: 1171
Brown, J.G., Dollimore, J., Freedman, C.M. and Harrison, B.H., Thermochim. Acta, 1970, 1: 499
Lang, F.M. and Magnier, P., “Chemistry and Physics of Carbon”, Vol. 3, P.L. Walker, Jr., Ed., Marcel Dekker, New York, 1968, p. 121
Chung, G.C., Jun, S.H., Lee, K.Y. and Kim, M.H., J. Electrochem. Soc., 1999, 146: 1664
Sahouli, B., Blacher, S., Brouers, F., Darmstadt, H., Roy, C. and Kaliaguine, S., Fuel, 1996, 75(10): 1244
Ling, C., Liang, L., Dajun, W. and Guohua, C., Polym. Compos., 2007, 28: 493
Meunier, L., Chagnon, G., Favier, D., Orgeas, L. and Vacher, P., Polym. Test., 2008, 27: 765
Park, E.S., J. Appl. Polym. Sci., 2007, 105: 460
Jia, L.Y., Du, Z.J., Zhang, C., Li, C.J. and Li, H.Q., Polym. Eng. Sci., 2008, 48: 74
Kohl, J.G., Singer, I.L. and Simonson, D.L., Polym. Test., 2008, 27: 679
Mohsen, M., Abd-El Salam, M.H., Ashry, A., Ismail, A. and Ismail, H., Polym. Degrad. Stab., 2005, 87: 381
Asad Ali, S., Kumar, R., Nambissan, P.M.G., Singh, F. and Prasad, R., Nucl. Instrum. Methods Phys. Res., Sect. B, 2010, 268(11–12): 1809
Kumar, R., Udayan, D., Nambissan, P.M.G., Maitra, M., Asad, A.S., Middya, T.R., Tarafdar, S., Singh, F., Avasthi, D.K. and Prasad, R., Nucl. Instrum. Methods Phys. Res., Sect. B, 2008, 266(8): 1783
Liao, Y., Peng, M., Liu, F. and Xie, X., Chinese J. Polym. Sci., 2013, 31(6): 870
Jobando, V.O. and Quarles, C.A., Phys. Stat. Sol. (c), 2007, 4(10): 3763
Jobando, V.O. and Quarles, C.A., Phys. Stat. Sol. (c), 2007, 4(10): 3767
Gomaa, E., J. Appl. Polym. Sci., 2007, 105: 2564
Mostafa, N., J. Appl. Polym. Sci., 2008, 108: 3001
Kirkegaard, P., Eldrup, M., Mogensen, O.E. and Pederson, N.J., Comput. Phys. Commun., 1981, 23: 307
Kansy, J., Nucl. Instrum. Methods Phys. Res., Sect. A, 1996, 374: 235
Tao, S.J., Chem. Phys., 1972, 56: 5499
Eldrup, M., Lightbody, D. and Sherwood, N.J., Chem. Phys, 1981, 63: 51
Rowe, B.W., Pas, S.J., Hill, A.J., Suzuki, R., Freeman, B.D. and Paul, D.R., Polymer, 2009, 50: 6149
Patnaik, A., Zhu, Z., Yang, G. and Sun, Y., Phys. Status Solidi A., 1998, 169: 115
Chambon, F. and Winter, H.H., J. Rheol., 1987, 31(8): 683
Stevenson, I., David, L., Gauthier, C., Arambourg, L., Davenas, J. and Vigier, G., Polymer, 2001, 42: 9287
Leung, W.P. and Choy, C.L., J. Polym. Sci: Polym. Phys. Ed., 1983, 21: 725
Mullins, L. and Tobin, N.R., Rubber. Chem. Technol., 1957, 30: 555
Diani, J., Fayolle, B. and Gilormini, P., Eur. Polym. J., 2009, 45: 601
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Abd-El Salam, M.H., El-Gamal, S., Mohsen, M. et al. Effect of conductive fillers on the cyclic stress-strain and nano-scale free volume properties of silicone rubber. Chin J Polym Sci 32, 558–567 (2014). https://doi.org/10.1007/s10118-014-1428-7
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DOI: https://doi.org/10.1007/s10118-014-1428-7