高性能双组分环氧树脂浇注体系的热性能研究

Study on the Thermal performance of a Bicomponent High Performance Epoxy Resin for Advanced Composites

为不降低环氧树脂的力学性能和热性能而实现增韧,近年来人们又发展了用耐热性高和力学性能良好的热塑性树脂增韧环氧树脂。采用聚芳醚酮树脂(PAEK)粉末为改性剂,制备高性能双组分环氧树脂材料,并利用扫描电子显微镜(SEM)和热重/差热分析仪对材料的脆断断口形貌和碎末进行了观察与分析。结果表明,纯环氧树脂的升温DSC曲线表现为放热反应,而环氧树脂共混体系的升温DSC曲线表现为吸热反应;同时PAEK粉末的加入显著提高了环氧树脂浇注体系的热分解温度,提高了其热稳定性。SEM分析结果表明,PAEK粉末的加入,提高了基体材料的韧性。

In order to toughen and don ’ t reduce the mechanical properties and thermal properties of epoxy resin , in recent years thermoplastic resin is used for toughen epoxy resin because of its high heat resistance and excell-lent mechanical properties .In this paper , a bicomponent high performance epoxy resin for advanced composites , filled with PAEK powders were prepared .The fracture morphologies and scraps were analyzed by scanning elec-tron microscopy （ SEM） and differential scanning calorimetry .The experimental results showed that DSC curves of pristine bicomponent epoxy resin were exothermic reaction , and those of BE/PAEK-5 specimens were endo-thermic reaction .With the addition of PAEK powders , the thermal decomposition temperature and its thermal stability of the modified epoxy resin system were improved significantly .The results of SEM analysis also indica-ted that toughness was improved due to the addition of PAEK powders .