【摘要】 以杨木为试材,通过改性三聚氰胺树脂处理,并对其进行径向横纹方向压缩密实化处理,通过测定其回复率,确定最优的热压工艺条件为:热压温度190℃,热压时间30 min,压缩率50%。此工艺条件下,压缩材回复率较低,尺寸稳定性好,力学性能明显提高。并对其力学性能进行测定,观察分析X-射线衍射曲线,结果表明:经过密实化的改性杨木纤维素的相对结晶度较高。更多还原

【Abstract】 Densification experiment was carried out on poplar wood.First,it was treated by modified melamine resin,and then compressed in cross striations radial direction.Optimal technological conditions determined by measuring restoration ratio were: pressing temperature 190℃,pressing time 30 min,compressing rate 50%.Mechanical properties were measured,and X-ray diffraction curves were analyzed.The size stability and mechanical properties of the compressed poplar wood were improved greatly.The analysis of X-ray diffraction spectrum showed that the cellulose crystallinity was relatively higher.更多还原