Dr. Alejandro Sanz Parras

JAE-Doc Fellow

Soft and Polymeric Matter Group
Address: Serrano 121. 28006 Madrid Spain
Tlfn: (34)-(91)-5616800 ext 942415
asanz at iem.cfmac.csic.es


2008-present: JAE-doc contract at the macromolecular physics department (soft and polymeric soft condensed matter group), IEM, CSIC. Financial support from the CSIC.

2005 - 2008: Post-doctoral researcher in the Polymers & Microfluidics group of the Chemical Engineering Department (Imperial College London). Financial support from the Spanish Ministry of Science.

2004: Summer visitor at the Chemistry Department of the State University of New York at Stony Brook (USA). Working on Wide and Small x-ray scattering under the supervision of Professor B. S. Hsiao.

2002 - 2005: PhD in Polymer Physics at the Macromolecular Physics department of the Instituto de Estructura de la Materia (CSIC, Madrid, Spain) with Dr Tiberio Ezquerra and Dr Aurora Nogales. Title: "Nanostructure-Dynamics relationships in soft condensed matter: polymers versus low molecular weight compounds"

2001: Research grant at the Organic Chemistry Department of the Universidad de Alcalá (Madrid, Spain) supported by Eli & Lilly Company. Title of the project: "Development of new organic compounds with biological activity".

2000-2001: MSc Chemistry at the Chemical Physics department of the Universidad de Alcalá (Madrid, Spain). Title of the project: "Study of excimer formation on polymers by fluorescence spectroscopy".

1994-2000: BSc Chemistry (Licenciado en Quimica) by the Universidad de Alcalá (Madrid, Spain).


My research interests are dynamic processes in glass forming materials, such as low molecular weight liquids and amorphous or semi-crystalline polymers. Topics of interest are the glass transition and the interrelationship between the alpha and beta relaxations in amorphous polymers. On the other hand, I am interested in the role that crystalline lamella play on the dynamics of the remaining amorphous phase during the isothermal cold crystallization of polymers. The experimental techniques used for this purpose are the simultaneous combinations of scattering tools (x-ray and neutrons) with dielectric spectroscopy. My research project at the moment deals with the polymer dynamics under spatial nanoconfinemet. We are studying polymer dynamics at different time and length scales using neutron scattering techniques and relaxation spectroscopies (dielectric and mechanical). We seek to elucidate the dynamic consequences of nano-confinement of polymers using true nanocomposites, rather than thin polymer films. The addition of well-dispersed nanoparticles closely mimics the effects of thin-film confinement (decreasing Tg with increasing nanofiller content or decreasing supported film thickness). This evidence suggests that nanoparticle confinement provides a unique opportunity to study confined polymer dynamics but, in contrast with thin films, does not suffer from scattering volume signal limitations, and therefore will allow an exploration of ALL fast and local dynamics.



A. Sanz, T. A. Ezquerra, M. C. García-Gutiérrez, I. Puente-Orench, J. Campo and A. Nogales. "Localized translational motions in semicrystalline poly(ethylene terephthalate) studied by incoherent quasielastic neutron scattering". Eur. Phys. J. E (2013) 36, 24.

M. Hernández, A. Sanz, A. Nogales, T. A. Ezquerra and M. A. López-Manchado. "Structure and Segmental Dynamics Relationship in Natural Rubber/Layered Silicate Nanocomposites during Uniaxial Deformation". Macromolecules (2013) 46, 3176-3182.


N. Bitinis, A. Sanz, A. Nogales, R. Verdejo, M. A. López-Manchado and T. A. Ezquerra. "Deformation mechanisms in polylactic acid/natural rubber/organoclay bionanocomposites as revealed by synchrotron X-ray scattering". Soft Matter (2012) 8, 8990 - 8997.

D. E. Martínez-Tong, M. Soccio, A. Sanz, T. A. Ezquerra, N. Lotti, A. Munari and A. Nogales. "Towards homogeneous dynamics in incompatible blends by selective transesterification". Soft Matter (2012) 8, 2723-2730.


M. Hernandez, M. A. Lopez-Manchado, A. Sanz, A. Nogales and T. A. Ezquerra. "Effects of Strain-Induced Crystallization on the Segmental Dynamics of Vulcanized Natural Rubber". Macromolecules (2011), 44, 6574-6580.

A. Sanz, A. Nogales, T. A. Ezquerra, W. Haussler, M. Soccio, N. Lotti and A. Munari. "Homogeneous Dynamics within Inhomogeneous Environment in Semicrystalline Polymers". Macromolecules (2011) 44, 8124-8128.

A. Sanz, A. Nogales and T. A. Ezquerra. “From hard to soft confinement in a symmetric block copolymer: Local and segmental dynamics”. Soft Matter. (2011) I7, 6477-6483.

A. Sanz, A. Nogales, I. Puente-OrenchI, M. Jimenez-Ruiz and T.A. Ezquerra. “Detection of early stage precursor during formation of plastic crystal ethanol from the supercooled liquid state: A simultaneous dielectric spectroscopy with neutron diffraction study”. Physical Review Letters. (2011) 107, 025502.

A. Sanz, D. R. Rueda, T. A. Ezquerra and A. Nogales. "Disorder-Order Transition and Nanostructure Control in a Polystyrene-b-Poly(ethyl methacrylate) diblock Copolymer" Journal of Nanostructured Polymers and Nanocomposites. (2011) 7/1 10-17.


A. Sanz, A. Nogales and T. A. Ezquerra. "Influence of Fragility on Polymer Cold Crystallization" Macromolecules (2010) Vol. 43(1), 29-32.

A. Sanz, A. Nogales, T. A. Ezquerra, M. Soccio, A. Munari and N. Lotti. "Cold Crystallization of Poly(trimethylene terephthalate) As Revealed by Simultaneous WAXS, SAXS, and Dielectric Spectroscopy" Macromolecules (2010) Vol. 43(2), 671-679.

H.C. Wong, A. Sanz, J. F. Douglas and J. T. Cabral. "Glass formation and stability of polystyrene-fullerene nanocomposites" Journal of Molecular Liquids (2010). Vol. 153, 79-87.

A. Sanz, T. A. Ezquerra and A. Nogales. " Interplay between amorphous and crystalline domains in semicrystalline polymers by simultaneous SAXS, WAXS and Dielectric Spectroscopy" IOP Conf. Series: Materials Science and Engineering (2010). Vol. 14, 012011.

M. D. Ninago, A. J. Satti, A. E. Ciolino, M. A. Villar, E. M. Vallés, D. A. Vega, A. Sanz, A. Nogales and D. R. Rueda. " A new look of an old sight: Morphology of model PS-b-PDMS copolymers developed upon thermal treatment as revealed by x-ray scattering" Journal of Polymer Science Part A (2010). Vol. 48, 3119-3127.

J. Carretero-González, T. A. Ezquerra, S. Amnuaypornsri, S. Toki, R. Verdejo, A. Sanz, J. Sakdapipanich, B. S Hsiao and M. A. López-Manchado. "Molecular Dynamics of Natural Rubber as revealed by Dielectric Spectroscopy: The Role of Natural Cross-linking" Soft Matter (2010). Vol. 6, 3636-3642.

A. Linares, A. Nogales, A. Sanz, T. A. Ezquerra and M. Pieruccini "Restricted dynamics in oriented semicrystalline polymers: poly(vinilydene fluoride)" Physical Review E (2010). Vol. 82, 031802.


J. Martín, C. Mijangos, A. Sanz, T. A. Ezquerra and A. Nogales. "Segmental Dynamics of Semicrystalline Poly(vinylidene fluoride) Nanorods" Macromolecules (2009) Vol. 42(14), 5395-5401.


A. Sanz, M. Ruppel, J.F. Douglas, J.T. Cabral. “Plasticization effect of C60 on the fast dynamics of polystyrene and related polymers: An incoherent neutron scattering study”. Journal of Physics Condensed Matter. (2008) 20, 104209.


A. Sanz, A. Nogales, N. Lotti, A. Munari, T.A. Ezquerra. “Complex nature of the β relaxation and fragility of aromatic polymers”. Journal of Non Crystalline Solids. (2007) 353, 3989.

J.J. Hernández, M.C. García-Gutiérrez, A. Nogales, D.R. Rueda, A. Sanz, I. Sics, B.S. Hsiao, Z. Roslaniec, G. Broza, T.A. Ezquerra. “Deformation behaviour during cold drawing of nanocomposites based on single wall carbon nanotubes and poly(ether ester) copolymers”. Polymer. (2007) 48, 3286.

A. Nogales, D.R. Rueda, A. Sanz, M. C. García-Gutiérrez, T. A. Ezquerra, M. G. Zolotukhin, M. C. G. Hernández, S. Fomine, H.M. Colquhoun. “Characterization of the Layered Structure in Main Chain Dibenzo-18-crown-6 Ether Polymers by Simultaneous WAXS/MAXS-SAXS/DSC Measurements”. Macromolecules. (2007) 40(9), 3355.

A. Nogales, A. Sanz, I. Sics, M. C. García-Gutiérrez, T.A. Ezquerra. “Order and Segmental Mobility in Crystallizing Polymers”. Lectures Notes Physics. Springer-Verlag Berlin Heidelberg 2007.


A. Nogales, A. Sanz, T.A. Ezquerra. “The role of the β processes as precursors of the α relaxation in aromatic polymers”. Journal of Non Crystalline Solids. (2006) 352, 4649.

A. Nogales, A. Sanz, T.A. Ezquerra, R. Quintana, S. Muñoz-Guerra. “Molecular dynamics of poly(butylene tertbutyl isophtalate) and its copolymers with poly(butylene terephtalate) as revealed by broadband dielectric spectroscopy”. Polymer. (2006) 47, 7078.

A. Sanz, A. Nogales, N. Lotti, T.A. Ezquerra “Order and segmental dynamics during crystallization of polymers: Poly(butylene isophthalate)”. Polymer. (2006) 47, 1281.


C. Álvarez, A. Nogales, M.C. García-Gutiérrez, A. Sanz, Z. Denchev, S.S. Funari, M. Bruix, T.A. Ezquerra. “Confined crystallization in phase-separated Poly(ethylene terephthalate)/Poly(ethylene naphthalene 2,6-dicarboxilate) blends”. Eur. Phys J. E: Soft Condensed Matter. (2005) 18, 459.

A. Sanz, D.R. Rueda, A. Nogales, M. Jiménez-Ruiz, T.A. Ezquerra. “Molecular dynamics in crystalline acetone studied by dielectric spectroscopy and neutron diffraction”. Physica B. (2005) 370, 22.

T.A. Ezquerra, A. Martínez-Gómez, C. Álvarez, E. Alonso, A. Sanz, M.C. García-Gutiérrez, A. Bello, E. Pérez, S.S. Funari, M. Dommach. “Structure-Dynamics relationships during the amorphous to smectic transition of a main chain liquid crystalline polymer”. Journal of Non Crystalline Solids.Vol. (2005) 351, 2768-2772.

M. Jiménez-Ruiz, A. Sanz, A. Nogales, T.A. Ezquerra. “Experimental setup for simultaneous measurements of neutron diffraction and dielectric spectroscopy during crystallization of liquids” . Review of Scientific Instruments. (2005) 76, 043901.


A. Nogales, G. Broza, Z. Roslaniec, K. Schulte, I. Sics, B. S. Hsiao, A. Sanz, M.C. García-Gutiérrez, D.R. Rueda, C. Domingo, T.A. Ezquerra. “Low percolation threshold in nanocomposites based on oxidized single wall carbon nanotubes and poly(butylene terephthalate)”. Macromolecules, (2004) Vol. 37, (20), 7669-7672.

A. Sanz, M. Jiménez-Ruiz, A. Nogales, D. Martín, T.A. Ezquerra. “Hydrogen-bond network breakage as a fisrt step to isopropanol crystallization”. Physical Review Letters, (2004) Vol. 93, 1, 015503.

A. Sanz, A. Nogales, T.A. Ezquerra, N. Lotti, L. Finelli. “Cooperativity of the β relaxations in Aromatic Polymers”. Physical Review E. (2004) Vol. 70, 021502.


A. Sanz, F. Mendicuti. “Excimers in dilute solutions of N-vynilcarbazole/styrene copolymers of diferent molar compositions”. Polymer, (2002) Vol. 43, 6123-6130.

Last update: 16 May 2013