摘要
本文对热致性羟丙基纤维素液晶的超分子结构,用多种实验方法进行了研究。结果表明,它们为胆甾型液晶,在一定的温区内形成有序微区结构。在切应力作用下,微区进而发生形变和取向,甚至破坏和重组而生成原纤和微纤结构。原纤和微纤的尺寸分别为几个μm 和几百 nm.微纤是由高度取向的棒状分子链所组成,在晶区它们与剪切方向成28°夹角。这一结构模型能很好地解释条状织态结构及激光小角光散射的 H_V 图像特征。
The supermolecular structure of thermotropic liquid crystalline hydroxypropyl celluloseshas been studied by using various experimental methods.The results prove that they are atypical cholesteric liquid crystal and can form the ordered domain structures within certaintemperature range.With the action of shear stress they will further be deformed andoriented,even disrupted and reorganized to form the fibrils and microfibrils,the size of whichare about several μm and several hundreds nm respectively.The microfibril is composed ofthe rod-like chains which are existed in an angle of 28° with the sheafing direction.Thebanded structures and the Hv SALS patterns are well explained with a unified model sug-gested.
出处
《中国纺织大学学报》
CSCD
1990年第3期33-39,共7页
Journal of China Textile University
关键词
羟丙基纤维素
热致性液晶
超分子
fibril
supermolecular structure
hydroxypropyl cellulose
thermotropic liquid crystal
