不同PAN原丝结构差异性研究  

Study on structural differences of different PAN precursors

作　　者：贾龙飞[1] 李常清[1] 肖阳[1] 马晓娜[1] 徐樑华[1] 

机构地区：[1]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《化工新型材料》2013年第7期78-81,共4页New Chemical Materials

基　　金：国家科技部973项目(2006CB605302;2006CB605303)

摘　　要：选取碳纤维拉伸强度不同的PAN原丝,通过X射线衍射(XRD)、差示扫描量热仪(DSC)、扫描电镜(SEM)等,对其聚集态结构和形态结构进行了表征。通过分析原丝不同层次结构,建立不同结构与性能之间的关系,并对原丝不同结构对碳纤维强度的影响大小进行了对比。结果表明,结晶度、取向度和致密性是影响碳纤维强度的主要因素,随着晶态结构和取向结构的完善、致密性的提高,碳纤维强度随之增加。但原丝不同结构对碳纤维强度的影响大小是有区别的,从大到小依次为:致密性、取向度、结晶度与微晶尺寸。Selected some PAN precursors which tensile strength of PAN carbon fibers were different,by X-ray dif fraction（XRD）, differential scanning calorimetry （DSC）, scanning electron microscopy （SEM） and so on, its crystallinity, crystallite size,orientation,density,cross section morphology and surface morphology were characterized. By analyzing the different structural parameters, the relationship between structure and performance was established, and comparing the im- pact of different structural to strength of carbon fiber. The results showed that the crystallinity,orientation and density of carbon fiber were the main {actors, as they were upgraded, the strength of carbon fiber was increased. But there was a difference among the impact of different structural to strength of carbon fiber. In decreasing order： density, orientation and crystallinity, crystallite size.

关 键 词：PAN原丝 结构表征 性能 

分 类 号：TQ342.742[化学工程—化纤工业]