酯化、醚化改性对木材热性能的影响

选择马来酸酐、邻苯二甲酸酐和氯化苄作为木材改性剂，对杨木粉进行改性，采用扫描电子显微镜、傅里叶红外光谱、差式扫描量热仪和X射线衍射对改性前后杨木的热性能变化情况进行分析。DSC曲线分析表明，经过酯化、醚化改性后木材的热性能较改性前有不同程度的变化，其中木材经过氯化苄改性后，其玻璃化转化点温度降为100℃左右，具有较好的热塑性能；电镜扫描图与X射线衍射图谱显示，氯化苄改性杨木的微观形态发生了很大变化，木材原有的纤丝线状结构消失，苄基化木材细胞壁内部呈不规则的非结晶结构；红外光谱表明，木材经过氯化苄改性后，羟基被苄基取代，木材醚化效果明显。

Influence of esterification and etherification on wood thermoplastic properties

In this paper, the author chose cis-butanedioic anhydride, 1,2-benzenedicarboxylic anhydride, benzyl chloride as esterification and etherification reagent, on the purpose of researching the diversification of poplar. SEM, IR, DSC.and X-ray diffraction were used for diversification analysis. Using DSC, there are a great many of changes after esterification and etherification, especially by benzyl chloride. The benzylate poplar has good thermoplasticity, the melting temperature is about 100℃. The SEM and X-ray results revealed that the thready microstructure of benzylate poplar disappear , which had anomalistic noncrystalline microstructure. The IR revealed that after benzylate, the hydroxide of wood was replaced by benzyl, and the effect of etherification was evident.