摘要
以湿法纺丝制备的聚丙烯腈(PAN)纤维为研究对象,将纤维在二甲基亚砜(DMSO)水溶液中进行溶解,通过其溶解特征探讨了纤维的溶解机理,进而对纤维的径向结构进行分析表征,并结合红外测试分析了其径向结构对预氧化进程的影响。结果表明:PAN纤维的溶解机理为自内向外进行;通过纤维的溶解特征可分析出纤维径向结构,且与红外测试所得结论相同;凝固浴温度在45℃时与25℃相比,所得纤维径向上皮层及芯层更致密,过渡区域更疏松;预氧化进程初期,氧气更易在致密程度更低更疏松的纤维径向上发生扩散。
The mechanism of the dissolution of PAN fibers,prepared by wet spinning,in DMSO/H2O solution has been investigated.The radial structure of the fibers was characterized,and the influence of the oxidation process on the radial structure was analyzed by FT-IR spectroscopy.The results showed that the dissolution of PAN fibers occurs from the inside out.The radial structure of the fibers suggested by the dissolution characteristics is consistent with that indicated by FT-IR spectroscopy.When the temperature of the solidification bath was increased from 25 to 45℃,the skin and core became denser,but the boundary region becames more porous so that oxygen can diffuse more easily within the radial structure of the fibers during the oxidation process.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第3期66-69,共4页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家"973"计划(2011CB605602)
关键词
PAN纤维
径向结构
溶解
表征方法
PAN fibers
radial structure
dissolution
characterization method
