火炸药学报Issue(2)：70-74,5.DOI:10.14077/j.issn.1007-7812.2015.02.016
三元体系相分离制备硝化纤维素凝胶及其动态流变性的研究
Preparation of Nitrocellulose Gel Based on Phase Separation in Ternary System and Study on Its Dynamic Rheological Characteristics
张云华 1邵自强1
作者信息
- 1. 北京理工大学材料学院，北京 100081
- 折叠
摘要
Abstract
The nitrocellulose (NC)gels were prepared from a ternary system NC/acetone/ethanol by solvent evapo-ration induced phase separation.The response degrees of the gel to external stimuli (such as strain,frequency,tem-perature)were investigated by linear rheological methods.Dynamic rheological characteristics of NC gels were stud-ied.Results show that the final morphologies of NC gels are influenced by mass ratios of the initial solvent/non-sol-vent (acetone/ethanol)and NC contents.The effect of changing initial acetone/ethanol ratios on the dynamic rheo-logical characteristics of the NC gels is different from the effect of changing NC contents.With increasing the ace-tone content,the volume of the NC gel prepared decreases,the NC content in the gel increases,the storage modulus (G′)and loss modulus (G″)of NC gels increase as well as the critical strain value (γc )decreases with increasing the NC content in the gels,whereas the value of G′and G″first increase and then decrease with increasing the NC con-tent in the gels when the mass ratio of acetone/ethanol is 2∶3.The values of G′and G″of all NC gels over the en-tire temperature scanning are basically unchanged,indicating that the interactions among NC chains and between NC/solvent can not be disrupted upon heating to higher temperatures.关键词
物理化学/相分离/溶剂/非溶剂/硝化纤维素凝胶/流变性能Key words
physical chemistry/phase separation/solvent/nonsolvent/nitrocellulose gels/rheological behavior分类
军事科技引用本文复制引用
张云华,邵自强..三元体系相分离制备硝化纤维素凝胶及其动态流变性的研究[J].火炸药学报,2015,(2):70-74,5.
