Fiber formation via solution spinning of the cellulose/ammonia/ammonium thiocyanate system
Fiber formation via solution spinning of the cellulose/ammonia/ammonium thiocyanate system
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DOI：
10.1002/polb.1991.090290205
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发表时间：
1991-02
期刊：
影响因子：
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通讯作者：
Cheng-kung Liu;J. Cuculo;T. Allen;A. Degroot
中科院分区：
文献类型：
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作者：
Cheng-kung Liu;J. Cuculo;T. Allen;A. Degroot
本文研究了纤维素/氨/硫氰酸铵体系湿法纺丝成纤。本文介绍了在不同凝固条件下纺成的纤维的结构和拉伸性能的表征。显微镜观察表明，凝固剂的分子大小是支配纤维横截面形状的主导因素。密度，双折射，和结晶度的数据表明，较高的纤维素浓度和较低的凝固温度有利于发展的纤维具有更致密和更定向的结构。在最佳条件下，得到了一个明确的原纤结构。纤维拉伸性能的测定表明，纤维断裂强度与Hermans取向因子的平方和红外结晶度指数的乘积之间存在线性关系。
Fiber formation via the cellulose/ammonia/ammonium thiocyanate system by wet spinning has been investigated. This report presents a characterization of the structure and tensile properties of fibers spun under various coagulation conditions. Microscopic observations showed that the molecular size of coagulant was the dominant factor governing the crosssectional shape of the fibers. Density, birefringence, and crystallinity data indicated that a higher cellulose concentration and lower coagulation temperature favored development of a fiber with a denser and more oriented structure. Under optimum conditions, a welldefined fibrillar structure was obtained. Fiber tensile property measurements suggested the existence of a linear relationship between the fiber breaking tenacity and the product of the square of the Hermans' orientation factor and the infrared crystallinity index.