CAJ | 학술논문

将尼龙6(PA6)与功能化热膨胀石墨(EG–T)复合制备具有高性能化的PA6复合材料。可膨胀石墨经热膨胀、酸化、甲苯二异氰酸酯(TDI)功能化改性处理，制得EG–T，通过超声辅助挤出手段与PA6熔融共混制备得到PA6／EG–T复合材料。通过扫描电子显微镜、差示扫描量热仪分析及力学性能、热变形温度测试对PA6复合材料进行表征。结果表明，热膨胀石墨的功能化改性和超声外场的引入使热膨胀石墨的分散性提高，并且与PA6基体的界面结合力增强；PA6复合材料的结晶性能和耐热性能得到显著提高，同时，其力学性能也有所上升。超声辅助挤出制备的PA6／EG–T复合材料的结晶度相对于纯PA6提高了7.84%，热变形温度从纯PA6的76.5℃提升到了110.9℃，提高了34.4℃，拉伸强度和拉伸弹性模量相对于纯PA6分别提高了15.8%和16.8%。
장니룡6(PA6)여공능화열팽창석묵(EG–T)복합제비구유고성능화적PA6복합재료。가팽창석묵경열팽창、산화、갑분이이청산지(TDI)공능화개성처리，제득EG–T，통과초성보조제출수단여PA6용융공혼제비득도PA6／EG–T복합재료。통과소묘전자현미경、차시소묘량열의분석급역학성능、열변형온도측시대PA6복합재료진행표정。결과표명，열팽창석묵적공능화개성화초성외장적인입사열팽창석묵적분산성제고，병차여PA6기체적계면결합력증강；PA6복합재료적결정성능화내열성능득도현저제고，동시，기역학성능야유소상승。초성보조제출제비적PA6／EG–T복합재료적결정도상대우순PA6제고료7.84%，열변형온도종순PA6적76.5℃제승도료110.9℃，제고료34.4℃，랍신강도화랍신탄성모량상대우순PA6분별제고료15.8%화16.8%。
Abastract:Nylon 6(PA6) and functionalized thermal exfoliated graphite(EG–T) were melt to prepare high-performance PA6 composites. EG–T was prepared via thermal expansion,acid treatment,toluene diisocyanate(TDI) functional modification of expandable graphite. By using ultrasound-assisted extrusion means,EG–T was melt blending with PA6 to prepare PA6/EG–T composites. PA6/EG–T composites were characterized by SEM,DSC,mechanical properties and heat distortion temperature tests. The results show that a better dispersion and a stronger interfacial adhesion of thermal exfoliated graphite in PA6 matrix could be obtained with the modification of thermal exfoliated graphite and the ultrasound outfield. The crystallization and heat resistance properties of PA6/EG–T composites increase significantly. Meanwhile,the mechanical properties are also increased. The degree of crystallinity of PA6/EG–T composite prepared through ultrasound-assisted extruding is increased by 7.84% compared with pure PA6. Heat distortion temperature is raised to 110.9℃ from 76.5℃of pure PA6and is improved by 34.4℃. Tensile strength and modulus are relatively increased by 15.8% and 16.8%.