化学改性对聚丙烯腈纤维及预氧纤维结构性能的影响  

The Effect on Structure and Properties of Chemical Modification on PAN Precursor

作　　者：刘杰[1] 杜大艳[1] 梁杰英[1] 马兆昆[1] 

机构地区：[1]北京化工大学国家碳纤维工程技术研究中心,北京100029

出　　处：《高科技纤维与应用》2009年第5期21-25,54,55,共7页Hi-Tech Fiber and Application

基　　金：国家973计划项目(2006CB605304);国家863计划项目(2006AA06Z382);国家重点自然科学基金项目(50333070);国家自然科学基金项目(50673011)

摘　　要：对聚丙烯腈纤维进行了化学改性,借助差示扫描量热分析(DSC)、定量傅立叶红外光谱(FT-IR)、平衡含水率、密度、力学性能等分析方法,对比研究了改性纤维、预氧化纤维、碳纤维与未改性纤维的结构性能的变化。研究表明:化学改性可促使聚丙烯腈纤维较未改性纤维初始环化反应温度前移,终止温度后移,从而有效缓解纤维在预氧化过程中的集中放热,有利于纤维结构和质量的控制;经硫酸羟胺改性后的纤维较未改性纤维制得的碳纤维抗拉伸强度提高16.3%。In this paper polyacrylonitrile（PAN） precursor was chemically modified. The properties and structure of treated and untreated fibers were compared by using Differential Scanning Calorimetry （DSC）, Fourier Transform Infrared Spectroscopy （FT-IR）, water content, density and tensile strength. The result showed the fibers chemically modified cyclized earlier and exothermic reaction was relaxative. At same time the treated fibers were lower than untreated fibers in the degree of cyclization, water content, and density. The chemical modification of PAN precursor made the tensile strength of the carbon fibers enhancing by 16.3% compared to the fibers without treatment.

关 键 词：聚丙烯腈纤维 预氧纤维 化学改性 结构性能 碳纤维 

分 类 号：TQ342.31[化学工程—化纤工业] TQ342.74