TY - JOUR
T1 - Structure and dynamics in poly(L-lactide) copolymer networks
AU - Sabater I Serra, Roser
AU - Kyritsis, Apostolos
AU - Escobar Ivirico, Jorge L.
AU - Andrio Balado, Andreu
AU - Gómez Ribelles, Jose Luis
AU - Pissis, Polykarpos
AU - Salmerón-Sánchez, Manuel
N1 - Funding Information:
The support of the Spanish Ministry of Science through project No. MAT2009-14440-C02-01 (including the FEDER financial support) is kindly acknowledged. RSS acknowledges Generalitat Valenciana for the support through the grant BEST/2008 (Ordre de 28 de Desembre de 2007).
PY - 2010/3
Y1 - 2010/3
N2 - Poly(L-lactide) networks (PmLA) hydrophilized with different amounts of 2-hydroxyethyl acrylate (HEA) were investigated by dielectric relaxation spectroscopy, thermally stimulated depolarization currents, and differential scanning calorimetry. The incorporation of HEA units in the PmLA network, with the aim of modulating the water sorption capacity of the system, results in a material with a complex behavior. The system consists of phase-separated microdomains richer in one or the other comonomers that constitute the network. Initially, the addition of smalls amount of HEA units in the network gives rise to a one-phase, two-component system; however, when the amount of HEA in the system increases, a new phase (HEA-rich one) is formed containing some mLA chains that modify the main relaxation mode of these domains and the local dynamics of the system. The structure of the system has been analyzed by comparing the relaxational modes in the PmLA and PHEA homonetworks with those in the copolymer networks.
AB - Poly(L-lactide) networks (PmLA) hydrophilized with different amounts of 2-hydroxyethyl acrylate (HEA) were investigated by dielectric relaxation spectroscopy, thermally stimulated depolarization currents, and differential scanning calorimetry. The incorporation of HEA units in the PmLA network, with the aim of modulating the water sorption capacity of the system, results in a material with a complex behavior. The system consists of phase-separated microdomains richer in one or the other comonomers that constitute the network. Initially, the addition of smalls amount of HEA units in the network gives rise to a one-phase, two-component system; however, when the amount of HEA in the system increases, a new phase (HEA-rich one) is formed containing some mLA chains that modify the main relaxation mode of these domains and the local dynamics of the system. The structure of the system has been analyzed by comparing the relaxational modes in the PmLA and PHEA homonetworks with those in the copolymer networks.
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U2 - 10.1007/s00396-009-2180-3
DO - 10.1007/s00396-009-2180-3
M3 - Article
AN - SCOPUS:77952240898
SN - 0303-402X
VL - 288
SP - 555
EP - 565
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
IS - 5
ER -