TY - JOUR
T1 - Wood-polymer composites prepared by free radical in situ polymerization of methacrylate monomers into fast-growing pinewood
AU - Mattos, Bruno D.
AU - de Cademartori, Pedro H.G.
AU - Missio, André L.
AU - Gatto, Darci A.
AU - Magalhães, Washington L.E.
N1 - Funding Information:
The authors wish to thank CNPq (National Counsel of Technological and Scientific Development), CAPES (Coordination for the Improvement of Higher Education Personnel) and Fundação Araucária for the fellowships, and we thank Ms. Bia Carneiro for the professional support with the English language.
Publisher Copyright:
© 2015, Springer-Verlag Berlin Heidelberg.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - The aim of this study was to evaluate treatability, morphology and mechanical resistance of composites prepared by in situ polymerization of methyl methacrylate on Pinus taeda wood using glycidyl methacrylate and methacrylic acid as cross-linkers. Treatment consisted of impregnation by vacuum/pressure and polymerization at 90 °C for 10 h using heat catalyst. The treatability was characterized by loads of monomers, conversion of monomers to polymers, weight percent gain, permanent swelling, and densification. The morphology was characterized by SEM images, X-ray diffraction, confocal Raman microscopy, and mechanical properties by static bending, shore D hardness and brittleness tests. Composites with cross-linkers showed the highest monomers retention, and the highest conversion. Brittleness of the composites increased significantly, modulus of elasticity increased from 17 to 32 %, flexural strength increased by 22.4–45.3 %, and shore D hardness increased between 60.2 and 89.6 %. The GMA cross-linker provided the highest increments for mechanical resistance.
AB - The aim of this study was to evaluate treatability, morphology and mechanical resistance of composites prepared by in situ polymerization of methyl methacrylate on Pinus taeda wood using glycidyl methacrylate and methacrylic acid as cross-linkers. Treatment consisted of impregnation by vacuum/pressure and polymerization at 90 °C for 10 h using heat catalyst. The treatability was characterized by loads of monomers, conversion of monomers to polymers, weight percent gain, permanent swelling, and densification. The morphology was characterized by SEM images, X-ray diffraction, confocal Raman microscopy, and mechanical properties by static bending, shore D hardness and brittleness tests. Composites with cross-linkers showed the highest monomers retention, and the highest conversion. Brittleness of the composites increased significantly, modulus of elasticity increased from 17 to 32 %, flexural strength increased by 22.4–45.3 %, and shore D hardness increased between 60.2 and 89.6 %. The GMA cross-linker provided the highest increments for mechanical resistance.
UR - http://www.scopus.com/inward/record.url?scp=84944355692&partnerID=8YFLogxK
U2 - 10.1007/s00226-015-0761-5
DO - 10.1007/s00226-015-0761-5
M3 - Article
AN - SCOPUS:84944355692
SN - 0043-7719
VL - 49
SP - 1281
EP - 1294
JO - Wood Science and Technology
JF - Wood Science and Technology
IS - 6
ER -