Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Physical and Mechanical Properties of Methyl Methacrylate-Impregnated Wood from Three Fast-Growing Tropical Tree Species

  • Hadi, Yusuf Sudo (Forest Products Department, IPB University (Bogor Agricultural University)) ;
  • Massijaya, Muh Yusram (Forest Products Department, IPB University (Bogor Agricultural University)) ;
  • Zaini, Lukmanul Hakim (Forest Products Department, IPB University (Bogor Agricultural University)) ;
  • Pari, Rohmah (Forest Products Research and Development Center)
  • Received : 2019.01.11
  • Accepted : 2019.05.13
  • Published : 2019.05.25
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Abstract

Timber from plantation forests has inferior physical and mechanical properties compared to timber from natural forest because it is mostly from fast-growing tree species that are cut at a young age. Filling cell voids with methyl methacrylate (MMA) can improve the wood properties. The purpose of this study was to determine the physical and mechanical properties of MMA-impregnated wood from three fast-growing wood species, namely jabon (Anthocephalus cadamba (Roxb.) Miq.), mangium (Acacia mangium Willd) and pine (Pinus merkusii Jungh. & de Vriese). Wood samples were either immersed in MMA monomer or impregnated with it and then heated to induce the polymerization process. Jabon, which was the lowest density wood, had the highest polymer loading, followed by pine and mangium. The physical and mechanical properties of samples were affected by wood species and the presence of MMA, with higher-density wood having better properties than wood with a lower density. Physical and mechanical properties of MMA wood were enhanced compared to untreated wood. Furthermore, the impregnation process was better than immersion process resulting the physical and mechanical properties. Based on MOR values, the MMA woods were one strength class higher compared to untreated wood with regard to Strength Classification of Indonesian Wood.

Keywords

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Fig. 1. Entering MMA monomer to the wood voids: (a) immersion- and (b) impregnation-process.

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Fig. 2. MOR-MOE tested wood specimens: (a) MMAimpregnated pine, (b) MMA immersed mangium, and(c) untreated jabon.

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Fig. 3. Side- and end-hardness tested wood specimens:(a) untreated jabon, (b) MMA immersed pine, and(c) MMA impregnated mangium.

Table 1. Strength classification of Indonesian wood

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Table 2. Physical properties of each wood species and treatmenta

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Table 3. Analysis of variance results (F test) for physical properties

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Table 4. Further data analysis of wood species factor in physical and mechanical propertiesa

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Table 5. Further data analysis of treatment factor in physical and mechanical propertiesa

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Table 6. Mechanical properties of each wood species and treatmenta

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Table 7. Analysis of variance results (F test) for mechanical properties

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