MSA  Vol.2 No.6 , June 2011
Activation Volume of Secondary Relaxation
Author(s) Soheil Sharifi
ABSTRACT
Glass forming materials are characterized by a complex relaxation pattern, which evolves over several time decades. Dielectric spectroscopy has proven particularly useful for studying such scenario as it is able to monitor the dielectric dynamics of a system over a range up to 16 time decades. In this work we study effect of thermodynamic history on activation volume of secondary relaxation inside the glassy forming systems, Poly[(phenyl glycidyl ether)-co-formaldehyde], (PPGE) and 1,18-bis (p methoxyphenyl) cyclohexane (BMPC), with two different type of secondary relaxation. Our results show that at bout systems, activation volume of secondary depends to the thermodynamic history.

Cite this paper
nullS. Sharifi, "Activation Volume of Secondary Relaxation," Materials Sciences and Applications, Vol. 2 No. 6, 2011, pp. 624-628. doi: 10.4236/msa.2011.26084.
References
[1]   K. L. Ngai, M. Paluch, “Classification of secondary relaxation in glass-formers based on dynamic properties” J. Chem. Phys. Vol. 120, No. 2, 2004, pp. 857-873.

[2]   M. Vogel, P. Medick, EA Rossler,” Secondary relaxation processes in molecular glasses studied by nuclear magnetic resonance” Annual Reports On NMR Spectroscopy,Vol. 56, 2005. pp. 231-299.

[3]   L. Leuzzi,” Static and dynamic glass-glass transitions: A mean-field study” Philosophical Magazine,Vol. 88, November 2008, pp. 4015-4023.

[4]   M. Zuriaga, LC Pardo, P Lunkenheimer, J. Li Tamarit, N Veglio, M Barrio, FJ Bermejo, A Loidl, “New Microscopic Mechanism for Secondary Relaxation in Glasses” Physical Review Letters, Vol. 103, August 2009, pp. 075701-075704.

[5]   D. Prevosto, S. Capaccioli, M. Lucchesi, P.A. Rolla, K.L. Ngai,” Does the entropy and volume dependence of the structural α-relaxation originate from the Johari–Goldstein β-relaxation?” J. Non-Cryst Solid Vol. 355, 2009, pp. 705-711

[6]   J.D. Stevenson, P.G. Wolynes, “A universal origin for secondary relaxations in supercooled liquids and structural glasses” Nature Phys., Vol. 6, November 2009, pp. 62-68

[7]   R. Casalini, C.M. Roland,” Anomalous properties of the local dynamics in polymer glasses” J. Chem. Phys. Vol. 131, September 2009, pp. 114501-114501.

[8]   R. Casalini, C.M. Roland,” Effect of Crosslinking on the Secondary Relaxation in Polyvinylethylene” J. Pol. Sc.: Part B: Polymer Physics, Vol.48, Jan.2010,pp. 582-587.

[9]   K. Kessairi, S. Capaccioli, D. Prevosto, M. Lucchesi, S. Sharifi, P. A. Rolla, “Interdependence of Primary and Johari-Goldstein Secondary Relaxations in Glass-Forming Systems” J Chem Phys. B, Vol. 112, March 2008, pp 4470-4473.

[10]   D. Prevosto, S. Capaccioli, S. Sharifi, K. Kessairi, M. Lucchesi, P.A. Rolla, “Secondary dynamics in glass formers: Relation with the structural dynamics and the glass transition” J. Non-Cryst. Solids Vol. 353, December 2007, pp. 4278-4282.

[11]   K. Kessairi, S. Capaccioli, D. Prevosto, M. Lucchesi, P.A. Rolla,” Relaxation dynamics in tert-butylpyridine/tristyrene mixture investigated by broadband dielectric spectroscopy” J. Chem Phys. Vol. 127, November 2007, pp. 174502-174512.

[12]   S. Sharifi, D. Prevosto, S. Capaccioli, M. Lucchesi, M. Paluch, “Effect of thermodynamic history on secondary relaxation in the glassy state” J. Non-Cryst. Solids Vol.353, December 2007, Pages 4313-4317.

[13]   D. Prevosto, S. Sharifi, S. Capaccioli; P.A. Rolla, S. Hensel-Bielowka, M. Paluch,” New experimental evidence about secondary processes in phenylphthalein-dimethylether and 1,1’-bis(p-methoxyphenyl)cyclohexane ” J. Chem. Phys. Vol. 127, September 2007, pp. 114507-114513.

[14]   R. Casalini, and C. M. Roland, “Scaling of the supercooled dynamics and its relation to the pressure dependences of the dynamic crossover and the fragility of glass formers” Phys. Rev. B Vol. 71, January 2005, pp. 014210-014220.

[15]   Riccardo Casalini, Marian Paluch, and C Michael Roland, “The dynamics crossover region in phenol- and cresol-phthalein-dimethylethers under different conditions of pressure and temperature” J. Phys.: Condens. Matter, Vol. 15, March 2003, pp. S859-S867.

 
 
Top