纤维素纤维及薄膜动态粘弹性及其不连续非常态行为(Ⅱ)宽广温度范围内再生纤维素的动态粘弹行为考察  

Studies on the non continuous and abnormal behavior in dynamic viscoelasticities of cellulosic fibres and films (Ⅱ) The investigation of dynamic viscoelasticities of regenerated celluloses over a wide temperature range

作　　者：杨明山[1] 杨利庭[1] 金日光[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》1999年第4期36-39,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：中日合作科研项目

摘　　要：详细考察了三种再生纤维素样品在宽广温度范围内（－ １５０～３５０ ℃） 的粘弹性能。实验结果表明， 在该温度范围内， 三种再生纤维素均出现了α１ 、α２ 、αｓｈ 、α３ 、β和γ松弛等多种转变。从这些转变的特征值分析， 三种样品在结构上存在较大差异。样品ＲＡＹ 有较低的结晶度， 在晶区内和无定形区域内存在较高的结构不均匀性； 样品ＮＥＷ 的结晶度较高， 在晶区和无定形区内存在较高的结构均匀性； 而样品ＢＥＮ 的超分子结构介于这两者之间。这表明再生方法的不同， 其微细结构和超分子结构也不同。The systematic investigations on the dynamic viscoelasticity of regenerated cellulose over a wide temperature range have been conducted in this paper. From the experimental results, it is concluded that several relaxations have been observed in the dynamic viscoelastic spectra of regenerated cellulose solids over the wide temperature range from-150?℃ to 350?℃. From high temperature side, there are α 1, α 2, α sh , α 3, m, β and γ relaxations, which show that the viscoelasticity of regenerated cellulose is very complicated. Meanwhile, from the analysis of the characteristic values of these relaxations, it is shown that there is great difference in the microstructures and superstructures of the regenerated cellulose samples. This shows that different regeneration methods result in different microstructure and superstructure.

关 键 词：再生纤维素 纤维素纤维 温度范围 动态粘弹性 

分 类 号：TQ341.07[化学工程—化纤工业]