01978naa a2200325 a 450000100080000000500110000800800410001902400410006010000180010124501710011926000090029052009480029965000130124765000190126065000200127965000120129965000160131165000150132765300270134265300220136965300320139165300180142365300270144165300110146870000180147970000290149770000170152670000240154377300850156720430302017-07-10       2016    bl uuuu     u00u1 u    #d7 a10.4067/S0718-221X20160050000122DOI1 aMATTOS, B. D.  aColor changes of wood from Pinus taeda and Schizolobium parahybum treated by in situ polymerization of methyl methacrylate using cross-linkers.h[electronic resource]  c2016  aThe aim of this study was to evaluate the colorimetric properties of Pinus taeda and Schizolobium parahybum woods treated by in situ polymerization. The wood samples were impregnated in a vacuum/ pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1,5wt% as the catalyst. The treatments were characterized using attenuated total reflectance infrared (ATRIR) spectroscopy and weight percentage gain (WPG). The color evaluation was performed using CIEL*a*b* concepts, specular gloss, and UV-Visible spectrophotometry. Treated woods showed increases in band intensity related to polymers (1730, 1460 and 1145 cm-1), and WPG ranged from 39 to 164%, depending of the wood species and treatments. Lightness decreased, while the Chroma, gloss and the color coordinates increased. A darkening of the all treated samples was observed, and confirmed by the decrease in the reflectance intensity between 400 and 700 nm.  aPolymers  aWood treatment  aEspécie nativa  aMadeira  aPinus Taeda  aTratamento  aComposites (materials)  aEspécie exótica  aFree radical polymerization  aHeat catalyst  aSchizolobium parahybum  aUV-Vis1 aMISSIO, A. L.1 aCADEMARTORI, P. H. G. de1 aGATTO, D. A.1 aMAGALHAES, W. L. E.  tMaderas. Ciencia y tecnología, Concepcióngv. 18, n. 1, p. 113-124, ene. 2016.