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Wood-polymer composites prepared by free radical in situ polymerization of methacrylate monomers into fast-growing pinewood

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Abstract

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.

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Acknowledgments

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.

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Authors and Affiliations

  1. Integrate Graduate Program in Engineering and Materials Science, Polytechnic Center, Federal University of Paraná, Curitiba, 81531-990, Brazil

    Bruno D. Mattos & Washington L. E. Magalhães

  2. Wood and Forestry Science Center, Federal University of Paraná, Curitiba, 80210-170, Brazil

    Pedro H. G. de Cademartori

  3. Forestry Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil

    André L. Missio & Darci A. Gatto

  4. Faculty of Materials Engineering, Federal University of Pelotas, Pelotas, 96010-000, Brazil

    Darci A. Gatto

  5. Embrapa Forestry, Colombo, 83411-0008, Brazil

    Washington L. E. Magalhães

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  1. Bruno D. Mattos
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  2. Pedro H. G. de Cademartori
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  3. André L. Missio
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  4. Darci A. Gatto
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  5. Washington L. E. Magalhães
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Correspondence to Darci A. Gatto.

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Mattos, B.D., de Cademartori, P.H.G., Missio, A.L. et al. Wood-polymer composites prepared by free radical in situ polymerization of methacrylate monomers into fast-growing pinewood. Wood Sci Technol 49, 1281–1294 (2015). https://doi.org/10.1007/s00226-015-0761-5

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  • DOI: https://doi.org/10.1007/s00226-015-0761-5

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