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Espirais e Hélices - Do Polímero mais abundante da natureza
Godinho, M. H.; Canejo, J. P.; Brogueira, P.; Teixeira, P. I. C.A celulose é o polímero renovável mais abundante do mundo. É o principal constituinte das paredes celulares das plantas, as quais constituem a sua principal fonte.
Staphylococcus epidermidis adhesion on modified urea/urethane elastomers
Teixeira, P.; Trindade, A. C.; Godinho, M. H.; Azeredo, Joana; Oliveira, Rosário; Fonseca, J. G.Block urea/urethane co-polymer films present elastomeric properties with the possible tuning of their surface properties within a wide range and are therefore considered relevant surfaces for possible medical applications. In particular, thin free standing films of urea/urethane elastomers with two soft segments, polypropylene oxide and more hydrophobic polybutadiene, develop multistable states with surface top...
Optical, magnetic and dielectric properties of non-liquid crystalline elastomer...
Figueiredo Neto,A.M.; Godinho,M.H.; Toth-Katona,T.; Palffy-Muhoray,P.Magnetic nanoparticles from magnetic colloidal suspensions were incorporated in the urethane/urea elastomer (PU/PBDO) by swelling fully crosslinked elastomer samples with a toluene and ferrofluid mixture. It is shown that ferrofluid grains can be efficiently incorporated into the matrix of elastomers. The dependence of the birefringence of both the pure and ferrofluid-doped elastomer samples on strain is linear...
Staphylococcus epidermis adhesion on modified urea/urethane elastomers
Teixeira, P.; Trindade, A. C.; Fonseca, J. G.; Azeredo, Joana; Oliveira, Rosário; Godinho, M. H.Block Urea/Urethane copolymer films present elastomeric properties with the possible tuning of their surface properties within a wide range, and are therefore considered relevant surfaces for microbial adhesion studies. In particular, Urea/Urethane elastomers develop multi-stable statesª with surface topography features with remarkable regularity b. Moreover, complex surface structures may be obtained by suitab...
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