Dynamic Viscoelastic Properties of γ Rays Treated Bamboo Strip in Different Temperatures  

作　　者：Sun Fengbo Fei Benhua Jiang Zehui Cheng Haitao Yu Zixuan Chang Xiangzhen 

机构地区：[1]Key Laboratory of Bamboo and Rattan Science and Technology of State Forestry Administration,International Center for Bamboo and Rattan [2]Beijing Municipal Forestry Station

出　　处：《Chinese Forestry Science and Technology》2012年第3期77-78,共2页中国林业科技（英文版）

摘　　要：The dynamic viscoelastic properties of bamboo were tested by dynamic mechanics analyzer (DMA),and the measurements were done in the temperature range of 40℃ to 300℃at frequencies of 3 Hz.The results showed that with the increase of irradiation dose,the decrease of storage modulus with increasing temperature became more dramatically.The decrease extent of storage modulus was the lowest for non-irradiated bamboo.Two mechanical relaxation processes were observed for all kinds of irradiated bamboo.The a relaxation process in lower temperature range was due to glass transition of hemicellulose and login,while the β relaxation process occurred in higher temperature range was based on glass transition of cellulose.The loss peak strength ofαrelaxation process went up as the irradiation dose increase,while the loss peak strength of β relaxation process became up first and then down,which was caused by the chemical reaction of the chief composition of bamboo.The dynamic viscoelastic properties of bamboo were tested by dynamic mechanics analyzer (DMA),and the measurements were done in the temperature range of 40℃ to 300℃at frequencies of 3 Hz.The results showed that with the increase of irradiation dose,the decrease of storage modulus with increasing temperature became more dramatically.The decrease extent of storage modulus was the lowest for non-irradiated bamboo.Two mechanical relaxation processes were observed for all kinds of irradiated bamboo.The a relaxation process in lower temperature range was due to glass transition of hemicellulose and login,while the β relaxation process occurred in higher temperature range was based on glass transition of cellulose.The loss peak strength ofαrelaxation process went up as the irradiation dose increase,while the loss peak strength of β relaxation process became up first and then down,which was caused by the chemical reaction of the chief composition of bamboo.

关 键 词：γ RAY BAMBOO IRRADIATION dynamic VISCOELASTIC property 

分 类 号：S7[农业科学—林学]