摘要
以丙二酸环(亚)异丙酯和多乙烯多胺对碳纤维进行化学接枝反应,并制备了碳纤维/环氧树脂(CF/EP)复合材料。利用红外光谱、X射线光电子能谱、扫描电镜、动态力学分析对碳纤维和CF/EP复合材料进行表征和测试,研究了复合材料的力学性能,分析比较了2种接枝反应对碳纤维结构及复合材料界面结合的影响。结果表明,碳纤维表面分别成功接枝了-COOH和-NH2,且多乙烯多胺的接枝反应对碳纤维表面和CF/EP复合材料断面产生的效果更为突出,2种复合材料的拉伸强度分别提高了4.4%和17.5%,Tg分别提高了3.1℃和8.2℃,多乙烯多胺的接枝反应对改善界面更具优势。
The surface of carbon fibers was functionalized using isopropylidene malonate to graft terminal malonic esters and polyethylene polyamine to introduce amines. Carbon fiber / epoxy（ CF / EP） composites were consisted with functionalized carbon fibers and epoxy resin. The chemical properties and morphology of carbon fibers and CF / EP composites were characterized by FT-IR,XPS,SEM. The interface state of CF / EP composites was analyzed by DMA. Two kinds of surface functional group grafting methods were compared to investigate their differences in interface reinforcement. It is found that carbon fibers are naturally and effectively modified with carboxylic and amino groups. Moreover,the chemical grafting methods with polyethylene polyamine have a distinctive effect on morphologies of carbon fibers and CF / EP composites. The tensile strength of two sorts of composites is increased by 4. 4% and 17. 5%,and the glass transition temperature（ Tg） is increased 3. 1 ℃ and 8. 2 ℃,respectively. Obviously,the results demonstrate that the treatment of polyethylene polyamine offers obvious advantages.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第8期68-73,共6页
Polymer Materials Science & Engineering
基金
中南大学教师研究基金(2013jsjj002)
关键词
碳纤维
化学接枝
多乙烯多胺
复合材料
界面
carbon fibers
chemical grafting
polyethylene polyamine
composites
interface
