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Study on the Preparation and Mechanical Properties of Injection-Moulded Wood-Based Plastics

机译：注塑木基塑料的制备及力学性能研究

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The objectives of this study were to prepare injection-moulded wood-based plastics and to characterize their mechanical properties. Injection-moulded wood-based plastics with satisfactory flexural (65.7 MPa) and tensile strengths (30.1 MPa) were successfully obtained through a simple reaction of mulberry branch meal with phthalic anhydride (PA) in 1-methylimidazole under mild condition. The X-ray diffraction results indicated complete disruption of the crystallinity of cellulose because the pattern obtained for esterified fiber was almost a straight line without any peaks. The peaks in the Fourier transform infrared spectroscopy spectra (1738 and 748 cm(-1)) and NMR spectra (173.3 and 133.5 ppm) indicated the attachment of 0-carboxybenzoyl groups onto the wood fibers via ester bonds. The differential scanning calorimetry curves showed that the glass transition temperature decreased with increasing weight percentage gain (WPG). The derivative thermogravimetric analysis curves indicated that esterified wood fiber was less thermally stable than the untreated fiber and that the component tends to be homogeneous with increasing WPG. Scanning electron microscope revealed that the fractured surfaces of most samples were smooth and uniform but that high temperature and less PA dosage could lead to the appearance of holes and cracks. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41376.
机译：这项研究的目的是准备注塑木基塑料并表征其机械性能。在温和的条件下，通过将桑枝支粉与邻苯二甲酸酐（PA）进行简单的反应，成功地获得了具有令人满意的弯曲（65.7 MPa）和拉伸强度（30.1 MPa）的注塑木基塑料。 X射线衍射结果表明纤维素的结晶度完全破坏，因为酯化纤维获得的图案几乎是直线，没有任何峰。傅里叶变换红外光谱图（1738和748 cm（-1））和NMR光谱图（173.3和133.5 ppm）中的峰表明0-羧基苯甲酰基通过酯键连接到木纤维上。差示扫描量热曲线表明，玻璃化转变温度随着重量百分比增加（WPG）的增加而降低。导数热重分析曲线表明，酯化木纤维的热稳定性低于未处理纤维，并且随着WPG的增加，组分趋于均匀。扫描电子显微镜显示，大多数样品的断裂表面是光滑且均匀的，但是高温和少量的PA会导致出现孔和裂纹。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41376。

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