pan基碳纤维的结构对石墨化的影响-材料科学与工程专业毕业论文.docx

度和模量都较高。通过工艺调控, 的碳纤维,在2200。C高温处理后,,模量为 360GPa,其强度保持率为80%,。
关键词:PAN基碳纤维,微晶结构,径向结构,模量
万方数据
ABSTRACT
EFFECT OF CARBoN FIBER STRUCTURE oN GRAPHITIZATION
ABSTRACT
In the preparation of PAN-based carbon fiber,the change of pre—oxidation and carbonization conditions can influence the structures and also its mechanical graphitization of the carbon fiber can significantly improve tensile modulus of the fiber,but reduce its tensile the regulation of the initial structures of carbon fiber can achieve the regulation of fiber structu,re in graphitizing
improve the modulus of carbon fiber,reducing carbon fiber strength loss at the same time is an important foundation for producing high strength and modulus carbon fiber.
In this thesis,Raman spectrum and X_ray diffraction were mainly used to characterize the structure of carbon fiber and graphite fiber. Temperature dependence of carbon fiber structures Was studied on the study of the effect of primary crystallite structures of carbon fiber on high temperature graphitization,the
relationship between carbon fiber microcrystal structure and graphite fiber structure,properties and fiber structure Was established.
万方数据
北京化工大学硕士学位论文
The results showed that:晰th the increase of carbonization temperature,the change range of the carbon chemical structure and micro crystal structure appeared at 1 300"(2,The degree of graphite is greatly improved,and the graphite structure integrity is the radial direction,the structure of the core is different,and the crystallite structure
is more carbon fiber with higher initial graphite degree achieved relatively higher degree of graphite after high temperature treatment,and the graphite structure is relatively distribution of the radial structure is unifoITn,and the homogeneity is better in the process of the graphitization,the degree of