Dynamic mechanical characteristics of poplar veneers painted with damping coatings

XU Xinwu, YANG Xuelian, LYU Jining, CHEN Ling, SUN Yan, XU Shu

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2016, Vol. 40 ›› Issue (04) : 125-130.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2016, Vol. 40 ›› Issue (04) : 125-130. DOI: 10.3969/j.issn.1000-2006.2016.04.020

Dynamic mechanical characteristics of poplar veneers painted with damping coatings

  • XU Xinwu, YANG Xuelian, LYU Jining, CHEN Ling, SUN Yan, XU Shu
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Abstract

In order to develop wood-based damping plywood with anti-slip & vibration structural properties, damping coatings were used to treat poplar veneers. Two damping constructions, i.e., freedom and constrained, were tested. The dynamic mechanical properties of the veneer-based damping constructions were analyzed using the dynamic thermo-mechanical analysis(DMA)method. The research results showed that: ① Veneer-based damping constructions exhibited good damping performance at room temperature by applying damping coatings on veneer surface. ② The thickness of cured coating on veneer surface significantly influenced the damping performance, i.e., the thicker paint layer led to greater combined loss factor(η)and wider effective damping temperature range. With 0.5-2.0 mm thick freedom damping paints, η values were all greater than 0.10 with a peak greater than 0.30. Constrained veneer-based damping construction had the maximum η value of 0.12. ③ Veneer-based damping constructions had similar time-temperature superposition(TTS)behaviors to normal viscoelastic polymers.④ The freedom construction showed better damping performance than the constrained system. The aforementioned research findings are helpful for the manufacturing of the damping structural plywood. The research suggests to make damping structural plywood using the freedom construction with the 1.5-2.0 mm thick coating layer.

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XU Xinwu, YANG Xuelian, LYU Jining, CHEN Ling, SUN Yan, XU Shu. Dynamic mechanical characteristics of poplar veneers painted with damping coatings[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2016, 40(04): 125-130 https://doi.org/10.3969/j.issn.1000-2006.2016.04.020

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