碳纤维增强共聚酰胺6-66复合材料的制备及性能  

Fabrication and Properties of Carbon Fiber Reinforced Copolyamide 6-66 Composites

作　　者：尹宏杰 王松博 宋园园 程鹏高 李萌[3] 韩辉[3] 孙雪楠[3] 郭鹏杰[3] 马英哲 韩璐 唐娜 Hongjie Yin;Songbo Wang;Yuanyuan Song;Penggao Cheng;Meng Li;Hui Han;Xuenan Sun;Pengjie Guo;Yingzhe Ma;Lu Han;Na Tang(College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China;Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-Utilization,Tianjin 300457,China;Tianjin Changlu Haijing Group Co.LTD,Tianjin 300457,China)

机构地区：[1]天津科技大学化工与材料学院,天津300457 [2]天津市卤水化工与资源生态化利用重点实验室,天津300457 [3]天津长芦海晶集团有限公司,天津300457

出　　处：《高分子材料科学与工程》2021年第10期53-61,共9页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21808172);天津市自然科学基金资助项目(18JCQNJC05800);天津市科技支撑计划(18YFZGSF00330);天津市卤水化工与资源生态化利用重点实验室开放基金(BCERE201909)。

摘　　要：通过两段式聚合法制备共聚酰胺PA6-66,然后采用熔融共混得到碳纤维增强PA6-66复合材料(CF/PA6-66)。对复合材料的断面形貌、热性能、结晶性能、非等温结晶动力学、熔体流变性、力学性能和动态力学性能进行了分析。差示扫描量热(DSC)和热重分析结果表明,CF/PA6-66复合材料的熔点约为190℃,分解温度在376℃以上。DSC和X射线衍射分析表明,CF的加入加快了聚合物的结晶速率,促进γ晶型的形成。力学性能和熔体流变性能测试结果表明,随着CF含量的增加,复合材料的拉伸强度、弯曲强度与缺口冲击强度均先升高后降低,当CF含量为20%时,CF/PA6-66复合材料的拉伸强度与弯曲强度分别为95.54 MPa和121.42 MPa,相比纯PA6-66分别提升了82.26%和81.17%,同时其黏流活化能仅为35.43 kJ/mol。The copolyamide PA6-66 was prepared by two-stage polymerization method, and then the obtained PA6-66 was reinforced by carbon fiber(CF) through melt blending. The fracture surface morphology, thermal properties, crystallization properties, non-isothermal crystallization kinetics, melt rheology, mechanical properties and dynamic mechanical properties of the composites were analyzed. The results indicate that the melting point of the blends according to DSC measurement is about 190 ℃, and the decomposition temperature is above 376 ℃. The addition of CF accelerates the crystallization rate of the polymer and promotes the formation of γ crystal. The tensile strength, bending strength and notched impact strength of the composites increase firstly and then decrease with the increasing of CF content. When the CF content is 20%, the tensile strength and flexural strength of the CF/PA6-66 composite are 95.54 MPa and 121.42 MPa, respectively, which are 82.26% and 81.17% higher than those of pure PA6-66, and its viscous flow activation energy is only 35.43 kJ/mol.

关 键 词：共聚酰胺6-66 碳纤维 复合材料 黏流活化能 

分 类 号：TB332[一般工业技术—材料科学与工程]