P. S. Suchithra, V. K. Abitha, D. Patil, and A. V. Rane, Effect of hydroxyl value of acrylic polyol and type of crosslinkers on the properties of polyurethane coatings, Moroccan J. Chem, vol.3, pp.476-483, 2015.

D. J. Mills, S. S. Jamali, and K. Paprocka, Investigation into the effect of nano-silica on the protective properties of polyurethane coatings, Surface and Coatings Technology, vol.209, pp.137-142, 2012.
DOI : 10.1016/j.surfcoat.2012.08.056

F. Garwe, A. Schönhals, H. Lockwenz, M. Beiner, K. Schröter et al., -alkyl methacrylate)s, Macromolecules, vol.29, issue.1, pp.247-253, 1996.
DOI : 10.1021/ma9506142

M. A. Desando, M. A. Kashem, M. A. Siddiqui, and S. Walker, Dielectric studies of the ?1 and ?2 processes of poly(alkyl methacrylate) polymers, J. Chem. Soc., Faraday Trans, vol.2, pp.80-747, 1984.

N. G. Mccrum, B. E. Read, and G. Williams, Anelastic and Dielectric Effects in Polymeric Solids, 1967.

J. Janacek and J. Kolarik, Relaxation Behavior of Poly(methacrylic Acid) Esters Swollen by Low Molecular Weight Substances at Temperatures Below the Glass Transition Point, Journal of Polymer Science Part C: Polymer Symposia, vol.42, issue.1, pp.279-291, 1967.
DOI : 10.1002/polc.5070160125

F. Lednicky and J. Janacek, Relaxation behavior of the ester groups (? dispersion) in some swollen polymethacrylates, Journal of Macromolecular Science, Part B, vol.5, issue.2, pp.335-354, 1971.
DOI : 10.1080/00222347108212541

T. W. Wilson and D. T. Turner, Vitrification of water in a hydrogel, Macromolecules, vol.21, issue.4, pp.1184-1186, 1988.
DOI : 10.1021/ma00182a059

K. Mpoukouvalas, G. Floudas, and G. Williams, Origin of the ?, ?, (??), and ?Slow? Dielectric Processes in Poly(ethyl methacrylate), Macromolecules, vol.42, issue.13, pp.4690-4700, 2009.
DOI : 10.1021/ma900644t

H. Sasabe and S. Saito, Dielectric relaxations and electrical conductivities of poly(alkyl methacrylates) under high pressure, Journal of Polymer Science Part A-2: Polymer Physics, vol.6, issue.8, pp.1401-1418, 1968.
DOI : 10.1002/pol.1968.160060801

K. Schröter, R. Unger, S. Reissig, F. Garwe, S. Kahle et al., -butyl methacrylate):? Different Evaluation Methods and Experimental Conditions, Macromolecules, vol.31, issue.25, pp.31-8966, 1998.
DOI : 10.1021/ma9713318

URL : https://hal.archives-ouvertes.fr/in2p3-00114393

G. Floudas, -decyl methacrylate) below and above the Glass Transition, Macromolecules, vol.31, issue.20, pp.6951-6957, 1998.
DOI : 10.1021/ma9804601

URL : https://hal.archives-ouvertes.fr/hal-01140842

M. Beiner, K. Schröter, E. Hempel, S. Reissig, and E. Donth, -alkyl methacrylate) Homopolymers, Macromolecules, vol.32, issue.19, pp.6278-6282, 1999.
DOI : 10.1021/ma981780n

URL : https://hal.archives-ouvertes.fr/jpa-00247346

E. Dudognon, A. Berne, and C. Lacabanne, -butyl methacrylate), Macromolecules, vol.34, issue.12, pp.3988-3992, 2001.
DOI : 10.1021/ma001634t

URL : https://hal.archives-ouvertes.fr/hal-00823259

E. Dudognon, A. Berne, and C. Lacabanne, -hexyl methacrylate) by Dielectric Spectroscopies, Macromolecules, vol.35, issue.15, pp.5927-5931, 2002.
DOI : 10.1021/ma012243x

URL : https://hal.archives-ouvertes.fr/hal-00823259

E. Dudognon, A. Bernès, and C. Lacabanne, ?Alkyl Methacrylates): A Study by Dielectric Spectroscopies, Journal of Macromolecular Science, Part B, vol.74, issue.3, pp.591-604, 2004.
DOI : 10.1016/0032-3861(92)90793-V

C. Menissez, B. Sixou, L. David, and G. Vigier, Dielectric and mechanical relaxation behavior in poly(butyl methacrylate) isomers, Journal of Non-Crystalline Solids, vol.351, issue.6-7, pp.595-603, 2005.
DOI : 10.1016/j.jnoncrysol.2005.01.046

A. Kyritsis, P. Pissis, J. L. Gomez-ribelles, and M. Pradas, Dielectric relaxation spectroscopy in PHEA hydrogels, Journal of Non-Crystalline Solids, vol.172, issue.174, pp.174-1041, 1994.
DOI : 10.1016/0022-3093(94)90619-X

A. Kyritsis, P. Pissis, J. Ribelles, and M. Pradas, Polymer-water interactions in poly(hydroxyethyl acrylate) hydrogels studied by dielectric, calorimetric and sorption isotherm measurements, Polymer Gels and Networks, vol.3, issue.4, pp.445-469, 1995.
DOI : 10.1016/0966-7822(94)00009-3

J. Janacek, Mechanical Behavior of Hydroxyalkyl Methacrylate Polymers and Copolymers, Journal of Macromolecular Science, Part C: Polymer Reviews, vol.131, issue.1, pp.3-47, 1973.
DOI : 10.1002/jbm.820020408

J. Kolarik, Secondary relaxations in glassy polymers: Hydrophilic polymethacrylates and polyacrylates, J. Adv. Polym. Sci, vol.46, pp.119-161, 1982.
DOI : 10.1007/BFb0023985

G. Gates, J. Harmon, J. Ors, and P. Benz, Intra and intermolecular relaxations 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate hydrogels, Polymer, vol.44, issue.1, pp.44-207, 2003.
DOI : 10.1016/S0032-3861(02)00725-5

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.565.8034

R. and D. Calleja, Dielectric ? relaxation in poly(2-hydroxyethyl methacrylate), Journal of Polymer Science: Polymer Physics Edition, vol.17, issue.8, pp.1395-1401, 1979.
DOI : 10.1002/pol.1979.180170810

J. L. Gomez-ribelles, R. Diaz, and . Calleja, The ?? dielectric relaxation in some methacrylate polymers, Journal of Polymer Science: Polymer Physics Edition, vol.23, issue.7, pp.1297-1307, 1985.
DOI : 10.1002/pol.1985.180230702

G. A. Russell, P. Hiltner, D. Gregonis, A. Devisser, and J. Andrade, Thermal and dynamic mechanical relaxation behavior of stereoregular poly(2-hydroxyethyl methacrylate), Journal of Polymer Science: Polymer Physics Edition, vol.18, issue.6, pp.18-1271, 1980.
DOI : 10.1002/pol.1980.180180609

K. Pathmanathan and G. P. Johari, Dielectric and conductivity relaxations in poly(hema) and of water in its hydrogel, Journal of Polymer Science Part B: Polymer Physics, vol.28, issue.5, pp.28-675, 1990.
DOI : 10.1002/polb.1990.090280507

G. P. Johari, Dielectric behaviour of H-bonded liquids and amorphous and crystalline solids, Journal of Molecular Structure, vol.250, issue.2-4, pp.351-384, 1991.
DOI : 10.1016/0022-2860(91)85041-Z

A. Kyritsis, P. Pissis, J. L. Ribelles, and M. M. Pradas, Depolarization thermocurrent studies in poly(hydroxyethyl acrylate)/water hydrogels, Journal of Polymer Science Part B: Polymer Physics, vol.32, issue.6, pp.32-1001, 1994.
DOI : 10.1002/polb.1994.090320605

K. Pathmanathan and G. P. Johari, Relaxation and crystallization of water in a hydrogel, Journal of the Chemical Society, Faraday Transactions, vol.90, issue.8, pp.90-1143, 1994.
DOI : 10.1039/ft9949001143

N. Araujo, D. Gomes, J. L. Ribelles, M. M. Pradas, and J. F. Mano, Dynamic-mechanical behavior of hydrophobic???hydrophilic interpenetrating copolymer networks, Polymer Engineering & Science, vol.41, issue.133, pp.46-930, 2006.
DOI : 10.1002/pen.20564

M. S. Sanchez, R. Br?igido-diego, S. A. Iannazzo, J. L. Gomez-ribelles, and M. Pradas, The structure of poly(ethyl acrylate-co-hydroxyethyl methacrylate) copolymer networks by segmental dynamics studies based on structural relaxation experiments, Polymer, issue.Guildf, pp.45-2349, 2004.

K. Mohomed, T. G. Gerasimov, F. Moussy, and J. P. Harmon, A broad spectrum analysis of the dielectric properties of poly(2-hydroxyethyl methacrylate), Polymer (Guildf), pp.46-3847, 2005.

Z. W. Wicks, D. A. Wicks, and J. W. Rosthauser, Two package waterborne urethane systems, Progress in Organic Coatings, vol.44, issue.2, pp.161-183, 2002.
DOI : 10.1016/S0300-9440(02)00002-4

P. H. Corkhill, A. M. Jolly, C. O. Ng, and B. J. Tighe, Synthetic hydrogels: 1. Hydroxyalkyl acrylate and methacrylate copolymers - water binding studies, Polymer, vol.28, issue.10, pp.28-1758, 1987.
DOI : 10.1016/0032-3861(87)90021-8

K. Hofer and E. Mayer, Glass-liquid transition of water and ethylene glycol solution in poly(2-hydroxyethyl methacrylate) hydrogel, The Journal of Physical Chemistry, vol.94, issue.6, pp.94-2689, 1990.
DOI : 10.1021/j100369a083

B. Ramaraj and G. Radhakrishnan, Modification of the dynamic swelling behaviour of poly(2-hydroxyethyl methacrylate) hydrogels in water through interpenetrating polymer networks (IPNs), Polymer, vol.35, issue.10, pp.35-2167, 1994.
DOI : 10.1016/0032-3861(94)90245-3

M. B. Ahmad and M. B. Huglin, States of water in poly(methyl methacrylate-co-N-vinyl- 2-pyrrolidone) hydrogels during swelling, Polymer (Guildf), p.35, 1997.

G. Smyth, F. X. Quinn, and V. J. Mcbrierty, Water in hydrogels. 2. A study of water in poly(hydroxyethyl methacrylate), Macromolecules, vol.21, issue.11, pp.3198-3204, 1988.
DOI : 10.1021/ma00189a013

J. Rault, A. Lucas, R. Neffati, and M. Monleo, Thermal Transitions in Hydrogels of Poly(ethyl acrylate)/Poly(hydroxyethyl acrylate) Interpenetrating Networks, Macromolecules, vol.30, issue.25, pp.7866-7873, 1997.
DOI : 10.1021/ma970344i

F. X. Quinn, E. Kampff, G. Smyth, and V. J. Mcbrierty, Water in hydrogels. 1. A study of water in poly(N-vinyl-2-pyrrolidone/methyl methacrylate) copolymer, Macromolecules, vol.21, issue.11, pp.3191-3198, 1988.
DOI : 10.1021/ma00189a012

J. L. Gomez-ribelles, J. M. Meseguer-duenas, and M. Pradas, Dielectric relaxations in poly(hydroxyethyl acrylate): influence of the absorbed water, Polymer, vol.29, issue.6, pp.1124-1127, 1988.
DOI : 10.1016/0032-3861(88)90026-2

M. B. Ahmad, J. P. Mahony, M. Huglin, T. P. Davis, and A. C. Rlcclardone, Application of dielectric spectroscopy and DSC to the study of relaxations in some copolymeric hydrogels, Journal of Applied Polymer Science, vol.56, issue.3, pp.56-397, 1995.
DOI : 10.1002/app.1995.070560310

H. Xu, J. K. Vij, and V. J. Mcbrierty, Wide-band dielectric spectroscopy of hydrated poly (hydroxyethyl methacrylate), Polymer (Guildf), pp.35-227, 1994.
DOI : 10.1016/0032-3861(94)90683-1

L. M. Muratore, K. Steinhoff, and T. P. Davis, Self-reinforcing hydrogels comprised of hydrophobic methyl methacrylate macromers copolymerised with either N-vinyl-2-pyrrolidone or 2-hydroxyethyl acrylate, Journal of Materials Chemistry, vol.9, issue.8, pp.1687-1691, 1999.
DOI : 10.1039/a903071i

G. , D. Marco, M. Lanza, and M. Pieruccini, Dynamical mechanical measurements in dry PHEMA and its hydrogels, Nuovo Cim, vol.16, pp.849-854, 1994.

A. Hensel, J. Dobbertin, J. E. Schawe, A. Boller, and C. Schick, Temperature modulated calorimetry and dielectric spectroscopy in the glass transition region of polymers, Journal of Thermal Analysis, vol.267, issue.61, pp.46-935, 1996.
DOI : 10.1007/BF01983612

S. Havriliak and S. Negami, A complex plane analysis of ?-dispersions in some polymer systems, Journal of Polymer Science Part C: Polymer Symposia, vol.73, issue.1, pp.99-117, 1966.
DOI : 10.1002/polc.5070140111

S. Havriliak and S. Negami, A complex plane representation of dielectric and mechanical relaxation processes in some polymers, Polymer (Guildf), pp.161-210, 1967.

P. Steeman and J. Van-turnhout, A numerical Kramers-Kronig transform for the calculation of dielectric relaxation losses free from Ohmic conduction losses, Colloid and Polymer Science, vol.32, issue.2, pp.106-115, 1997.
DOI : 10.1007/s003960050059

T. R. Hesketh, J. W. Bogart, and S. L. Cooper, Differential scanning calorimetry analysis of morphological changes in segmented elastomers, Polymer Engineering and Science, vol.19, issue.3, pp.20-190, 1980.
DOI : 10.1002/pen.760200304

D. L. Sidebottom, B. Roling, and K. Funke, Ionic conduction in solids:?Comparing conductivity and modulus representations with regard to scaling properties, Physical Review B, vol.60, issue.174, 2000.
DOI : 10.1103/PhysRevB.63.024301

J. C. Dyre, The random free?energy barrier model for ac conduction in disordered solids, Journal of Applied Physics, vol.27, issue.22, pp.2456-2468, 1988.
DOI : 10.1080/00018738700101971

A. K. Jonscher, Dielectric relaxation in solids, Journal of Physics D: Applied Physics, vol.32, issue.14, pp.57-70, 1999.
DOI : 10.1088/0022-3727/32/14/201

G. Hartwig, Polymer Properties at Room and Cryogenic Temperatures, 1994.
DOI : 10.1007/978-1-4757-6213-6

S. Lustig, J. Caruthers, and N. Peppas, Dynamic mechanical properties of polymer-fluid systems: characterization of poly (2-hydroxyethyl methacrylate) and poly (2- hydroxyethyl methacrylate-co-methyl), Polymer (Guildf), pp.32-3340, 1991.

M. C. Shen and J. D. Strong, Low???Temperature Internal???Friction Study of Diluent Effect in Some Polymethacrylates, Journal of Applied Physics, vol.2, issue.11, pp.4197-4202, 1967.
DOI : 10.1016/0095-8522(57)90028-4

K. Mohomed, F. Moussy, and J. P. Harmon, Dielectric analyses of a series of poly(2- hydroxyethyl methacrylate-co-2,3-dihydroxypropyl methacylate) copolymers, Polymer (Guildf), pp.47-3856, 2006.

L. V. Karabanova, G. Boiteux, G. Seytre, I. Stevenson, O. Gain et al., Semi-interpenetrating polymer networks based on polyurethane and poly(2-hydroxyethyl methacrylate): Dielectric study of relaxation behavior, Journal of Non-Crystalline Solids, vol.355, issue.28-30, pp.1453-1460, 2009.
DOI : 10.1016/j.jnoncrysol.2009.05.002

URL : https://hal.archives-ouvertes.fr/hal-00423360

R. Sabater, I. Serra, J. L. Escobar-ivirico, J. M. Meseguer-duenas, A. Andrio-balado et al., Dielectric relaxation spectrum of poly (??-caprolactone) networks hydrophilized by copolymerization with 2-hydroxyethyl acrylate, The European Physical Journal E, vol.37, issue.4, pp.293-302, 2007.
DOI : 10.1140/epje/e2007-00036-7

J. Kolarik and J. Janacek, Dynamic mechanical behavior of poly(2-hydroxyethyl methacrylate)?glass beads composites, Journal of Applied Polymer Science, vol.20, issue.3, pp.841-851, 1976.
DOI : 10.1002/app.1976.070200325