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題名 | Research and Development of Wood/Plastic Composite Materials(II)--Dynamic Viscoelasticities of three Types of Wood Fibre/PP Composites, Spruce Wood and Particleboard=木材/塑膠複合材料之研究開發(2)--三種木纖維/PP複合材, 雲杉木及粒片板之動粘彈性 |
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作者姓名(中文) | 彭武財; 黃彥三; 陳玉秀; | 書刊名 | 林業試驗所研究報告季刊 |
卷期 | 10:1 1995.03[民84.03] |
頁次 | 頁93-103 |
分類號 | 440.31 |
關鍵詞 | 動彈性係數; 損失彈性係數; 損失正切; 對數衰減率; 共振一衰減曲線; 內部磨擦; Dynamic elastic modulus; Loss modulus; Loss tangent; Logarithmic decrement; Resonant-dumping curve; Internal friction; |
語文 | 英文(English) |
中文摘要 | 本研究之目的在探討三種木材纖維/聚丙烯複合物之動態特性,同時與雲杉材及粒片板之性質互作比較。此外,此等複合材料使用作音響材料之可行性亦加以討論,並與其他研究者所獲致之性質相比較。所使用材料為工業廢棄木材纖維-砂光粉、鉋屑末、鋸屑-與聚丙烯之複合物,各組具五種水準之纖維含量(10,20,30,40及50%)及一組純聚丙烯,同時亦準備氣乾雲杉材及粒片板。 所有試驗經採用標準規格及由試驗室所發展之動態及靜曲試驗方法。結果經分析及作統計結論。茲將主要成果分列如下: 1.三種木材纖維/聚丙烯複合物中具較高木材纖維含量者似乎頗適合作為音響材料,因其動態性質與粒片板、硬質纖維板及其他木質材料頗相接近。 2.木材纖維/聚丙烯複合材、實木及粒片板之靜曲彈性係數E均較動彈性係數E'為低,E與E'之差因材料及木材纖維含大量之比率而有大差異。 3.三種複合材料之靜曲彈性係數E與動彈性係數E',損失彈性係數E",損失正切tan δ及對數衰減率 間有顯著相關性存在。 4.複合木材之靜曲強度與動彈性係數E'間具有相關性。 5.木材纖維/聚丙烯複合物可利用射出成型技術製作不同形狀之音響箱材。 |
英文摘要 | The purpose of this study was intended to investigate and evaluate the dynamic properties of three type wood fibre/PP composites, and also to com-pare them with the values obtained from sitka spruce wood and particleboard. The feasibility of using as the musical sound boards and speeker boxes for these composites was also discussed based on the property data obtained from solid wood and wooden panel of this test and the others. The materials used are those discarded wood fibres-sander dusts (SrD), wood fines (W.F.), sawdust (SwD) - and polypropylene (PP) composites. With each contained five levels of fibre content (F.C. 10, 20, 30, 40 and 50%) and a set of pure polypropylene (PP or F.C. 0%) specimens were injection moulded. Similar size air dry sitka spruce wood (parallel to and perpendi-cular to wood grain) and larger size particleboard (19X1.5X0.6 cm) specimens were also prepared.All test were carried out strictly in accordance with the standard method (bending vibration) developed in here institute. The results were then analysed and comparted statistically. 1. E' values of composites, spruce wood and particleboard tended to be higher than those obtained from their static flexural elastic modulus (F.E.M. or E) values. The difference between E' and E values varied noticiablily by the percents F.C., types of composites, specific gravity and the materials. 2. F.E.M. or E values of three type composites correlated significantly with their E', loss modulus E', loss tangent (tan δ) and logarithmic decremnet (λ). 3. Static maximum flexural strength (M.F.S.) of three type composites on the other hand, correlated only with their E'. 4. Three type composites seemed to be feasible for applying as the sound board or box of musical instrument since their dynamic properties are quite close to those of solid wood, particleboard as well as hardboard which have satis-factorily been applied for it. 5. It will be encouraged to see that the using of wood fibre/plastic composite materials to fabricate the musical sound boxes of any size and shape by injection moulding or other processes. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。