Compósitos madeira-polímero produzidos por polimerização in situ nos lenhos juvenil e adulto de pinus

Abstract

Need for youth wood improvement programs simplifying your research this study aimed to produce polymer-wood using poly (styrene), poly (methyl methacrylate), poly (vinyl acetate) and poly (furfuryl alcohol) impregnated in juvenile and mature wood of Pinus elliottii under pressure and polymerized in situ. For this, the lord of the pine wood was cut close to the bark (mature wood) and the pitch (juvenile wood). These woods were impregnated with monomers, which were cured under heating. Treatment parameters adopted were mass gain, apparent specific mass, morphology by means of anatomical sheets, chemical characteristics by infrared spectroscopy, thermal stability by thermogravimetry, mechanical properties in static flexion and surface hardness. In situ polymerization provided greater mechanical properties and greater thermal stability, attributed to the impregnated polymers, as suggested by the treatment parameters and infrared spectra. The treatment that stands out the most in relation to the mechanical and thermal properties among the possible ones, was with poly (styrene), due to the better correction of the polymer in the cell wall. Thus, the impregnation treatment can be a strategic way to improve the properties of pine wood, especially juvenile wood, which can surpass the properties of mature wood, as was the case observed for all cases with regard to mechanical properties. Keywords: wood filling; impregnation; mechanical strength; polymers; wood quality.