CAJ | 학술논문

以表面含有氨基的可反应性纳米SiO2（RNS‐A）和表面含有烷基碳链的可分散性纳米SiO2（DNS‐3）作为填料，利用原位聚合法制备了尼龙6／SiO2纳米复合材料（相应的复合材料分别简记为RPA和DP3）；采用透射电子显微镜观察了复合材料中纳米SiO2的表面形貌，并利用热失重分析仪测定了复合材料的热稳定性，进而考察了纳米SiO2表面功能基团对尼龙6力学性能和热稳定性的影响．结果显示，纳米SiO2能够很好地分散在尼龙6基体中，并使尼龙6的热分解温度提高10℃左右．与此同时，RPA的最大拉伸强度和冲击强度较纯尼龙6的分别提高345．％和125．％，DP3的最大拉伸强度和冲击强度分别提高182．％和457．％．这表明两种纳米SiO2均可以有效地提高尼龙6的力学性能和热稳定性；可以推测，纳米SiO2的增强效应与其在尼龙6基体材料中的分散和界面作用有关．
이표면함유안기적가반응성납미SiO2（RNS‐A）화표면함유완기탄련적가분산성납미SiO2（DNS‐3）작위전료，이용원위취합법제비료니룡6／SiO2납미복합재료（상응적복합재료분별간기위RPA화DP3）；채용투사전자현미경관찰료복합재료중납미SiO2적표면형모，병이용열실중분석의측정료복합재료적열은정성，진이고찰료납미SiO2표면공능기단대니룡6역학성능화열은정성적영향．결과현시，납미SiO2능구흔호지분산재니룡6기체중，병사니룡6적열분해온도제고10℃좌우．여차동시，RPA적최대랍신강도화충격강도교순니룡6적분별제고345．％화125．％，DP3적최대랍신강도화충격강도분별제고182．％화457．％．저표명량충납미SiO2균가이유효지제고니룡6적역학성능화열은정성；가이추측，납미SiO2적증강효응여기재니룡6기체재료중적분산화계면작용유관．
Nylon 6/SiO2 nanocomposites (denoted as RPA and DP3) were prepared by in situ polymerization method with reactable nano‐SiO2 containing active amino group (denoted as RNS‐A ) and dispersible nano‐SiO2 containing alkyl carbon chain (denoted as DNS‐3 ) as the fillers .The surface morphology of as‐prepared composites was observed with a transmission e‐lectron microscope ,and their thermal stability was evaluated by thermogravimetric analysis . Furthermore ,the effects of surface functional groups of nano‐SiO2 on the mechanical proper‐ties and thermal stability of nylon‐6 matrix were investigated .Results indicate that the two kinds of nano‐SiO2 can be uniformly dispersed in nylon 6 matrix and increase the thermal de‐composition temperature of nylon 6 by about 10 ℃ .In the meantime ,the maximum tensile strength and impact toughness of as‐prepared RPA composite are higher than that of neat nylon 6 by 34 5.% and 12 5.% ,w hile those of DP3 composite increase by 18 2.% and 45 7.% as com‐pared with the polymer matrix .This demonstrates that both RNS‐A and DP3 can effectively improve the mechanical properties and thermal stability of nylon 6 ,w hich could be closely re‐lated to their dispersion in the polymeric matrix and the interfacial effect as well .