Influence of the polymer molecular weight on the microstructure of hybrid materials prepared by gamma-irradiation
authors Lancastre, JJH; Falcao, AN; Margaca, FMA; Ferreira, LM; Salvado, IMM; Casimiro, MH; Almasy, L; Meiszterics, A
nationality International
journal RADIATION PHYSICS AND CHEMISTRY
author keywords Hybrid materials; Gamma irradiation; Microstructure; Molecular weight
abstract Hybrid materials have been the object of intense research due to their potential for biomedical applications as well as in other fields. They are usually prepared by sol-gol but the method of gamma irradiation of the precursors is an alternative avoiding the addition of any other chemicals. The study of the hybrids prepared by this method has been progressing to understand the impact of different variables on the microstructure. In this work, the influence of the polymer's molecular weight on the microstructure of the materials is investigated. Hybrids were obtained from a mixture of polydimethylsiloxane (PDMS) silanol terminated, tetraethylorthosilicate (TEOS) and zirconium propoxide (PrZr) in the wt% composition 20PDMS-73TEOS-7PrZr varying only the PDMS molecular weight. The obtained materials are homogeneous, transparent and flexible and their microstructure was analysed by Scanning Electron Microscopy (SEM) and Small-Angle Neutron Scattering (SANS). It was found that different microstructures were obtained, depending on the polymer molecular weight. (C) 2014 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0969-806X
year published 2015
volume 106
beginning page 126
ending page 129
digital object identifier (doi) 10.1016/j.radphyschem.2014.06.023
web of science category Chemistry, Physical; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Nuclear Science & Technology; Physics
unique article identifier WOS:000344422400019
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