林业科学2012，Vol.48Issue(3)：160-163,4.
γ射线辐照处理竹材的动态黏弹性与温度变化的关系
Dynamic Viscoelastic Properties of γ Rays Treated Bamboo Strip in Different Temperatures
摘要
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.关键词
γ射线/竹材/辐照/动态黏弹性Key words
γ rays/ bamboo/ irradiation/ dynamic viscoelastic properties分类
农业科技引用本文复制引用
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):160-163,4.基金项目
国家"十一五"科技支撑课题"辐照技术在环保竹质新材料中的应用研究"(2008BADA9B03). （2008BADA9B03）
