@inproceedings{inproceedings81966e92, title = {Structural characterization of urethane/urea elastomers undoped and doped with magnetic nanoparticles by proton NMR relaxometry and X-ray diffraction}, author = {Sena, Cleidilane Oliveira and Figueiredo Neto, Antônio Martins and Sebastião, P J and Godinho, M H}, year = {2009}, publisher = {SBF}, booktitle = {Encontro Nacional de Física da Matéria Condensada} }