改性碳纳米管原位增强C36二聚脂肪酸柔性不饱和聚酯树脂的制备与性能

A new type of unsaturated polyester resin with reactive multi-walled carbon nanotube and C36 dimer fatty acid:preparation and property

采用原位聚合制备MWCNTs-OH改性C36二聚脂肪酸基柔性不饱和聚酯树脂,研究了掺入不同质量分数的MWCNTs-OH对DFA/UPR复合材料的力学性能、断面微观形貌、热稳定性以及耐溶剂性能的影响。经FTIR和SEM分析得出,MWCNTs-OH作为可反应型填料参与原位缩合反应,聚酯树脂的断裂方式为韧性断裂。不饱和聚酯树脂材料的综合性能在碳纳米管质量分数为0.6%时达到最佳,拉伸强度、弹性模量、断裂伸长率和弯曲强度分别提高了78.94%、111.02%、16.38%和70.03%,材料的热稳定性和耐溶剂性能得到有效改善。

A MWCNTs-OH modified C36 dimer fatty acid-based flexible unsaturated polyester resin was prepared through the in-situ polymerization method.The aim of this study was to find a suitable nanofiller for UPR to improve the mechanical properties of DFA/UPR.The material structure,morphology of the tensile fracture surface,and elemental composition of the fracture surface were analyzed by FTIR and SEM.It was found that MWCNTs-OH grafted onto the DFA/UPR backbone by chemical bonds,and the material exhibited ductile fracture.The effects of the loading of MWCNTs-OH on the thermal stability,mechanical property and solvent resistance of the material were investigated using TGA,tensile analysis,flexural analysis,hardness analysis and solvent resistance analysis.The results indicated that compared to DFA/UPR,the material in the mass fraction of 0.6%MWCNTs-OH showed the optimum property,the tensile strength,elasticity modulus,elongation-at-break and flexural strength increased by 78.94%,111.02%,16.38%,and 70.03%,respectively,and the solvent resistance and thermal stability of the resin were effectively improved.