| γ射线辐照处理竹材的动态黏弹性与温度变化的关系 |
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| 引用本文： | 孙丰波,费本华,江泽慧,程海涛,于子绚,常祥祯.γ射线辐照处理竹材的动态黏弹性与温度变化的关系[J].林业科学,2012,48(3):160-163. |
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| 作者姓名： | 孙丰波 费本华 江泽慧 程海涛 于子绚 常祥祯 |
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| 作者单位： | 1. 国际竹藤网络中心 国家林业局竹藤科学与技术重点实验室 北京100102
2. 北京市林业工作总站 北京100029 |
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| 基金项目： | 国家"十一五"科技支撑课题 |
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| 摘 要： | 木质材料的动态黏弹性是指在交变的应力、应变作用下发生的滞后现象和力学损耗(徐有明,2006),是影响材料加工利用的重要因素。研究表明:木材在不同的含水率下,或经干燥、压缩等不同处理后,其动态黏弹性均会发生改变(蒋佳荔等,
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| 关 键 词： | γ射线 竹材 辐照 动态黏弹性 |
Dynamic Viscoelastic Properties of γ Rays Treated Bamboo Strip in Different Temperatures |
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| Sun Fengbo
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Fei Benhua
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Jiang Zehui
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Cheng Haitao
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Yu Zixuan
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Chang Xiangzhen.Dynamic Viscoelastic Properties of γ Rays Treated Bamboo Strip in Different Temperatures[J].Scientia Silvae Sinicae,2012,48(3):160-163. |
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| Authors: | Sun Fengbo Fei Benhua Jiang Zehui Cheng Haitao Yu Zixuan Chang Xiangzhen |
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| Institution: | 1.Key Laboratory of Bamboo and Rattan Science and Technology of State Forestry Administration International Center for Bamboo and Rattan Beijing 100102;2.Beijing Municipal Forestry Station Beijing 100029) |
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| Abstract: | 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 α 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 of α relaxation process went up as the irradiation dose increase,while the loss peak strength of β relaxation process became go up first and then down,which was caused by the chemical reaction of the chief composition of bamboo. |
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| Keywords: | γ rays bamboo irradiation dynamic viscoelastic properties |
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