Stress relaxation of chemically treated wood during processes of temperature elevation and decline |
| |
| Authors: | Xie?Man-hua Email author" target="_blank">Zhao?Guang-jie?Email author |
| |
| Institution: | College of Material Science and Technology, Beijing Forestry University, Beijing 100083, P. R. China |
| |
| Abstract: | In order to clarify the effect of drying on structural changes of DMSO swell treated and DEA-SO2-DMSO decrys-tallization treated Chinese fir (Cunninghamia lanceolate) wood, the stress relaxation of treated oven-dry specimens during the processes of temperature elevation and reduction and that of treated wet specimens at constant temperature were determined. A stress decrease process and a stress increase process were observed in all stress ratio curves of wood during the processes of decreasing temperature. Untreated wood, during the process of temperature reduction under higher initial temperature conditions and during the process of temperature elevation, has a larger stress decrease than treated woods. In a wet state this trend is reversed. It indicated that the drying set made treated woods have a smaller increase in fluidity of wood constituents with increasing temperature. Some bonding between decrystallization reagents and wood molecules may occur. |
| |
| Keywords: | wood stress relaxation chemical treatment structural changes interaction |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《中国林学》浏览原始摘要信息 |
| 点击此处可从《中国林学》下载免费的PDF全文 |
