耐高温端乙炔基聚醚酰亚胺改性含硅芳炔树脂

发布时间：2019-06-21 00:28

【摘要】：采用预共聚法,以含硅芳炔树脂(PSA)和端乙炔基聚醚酰亚胺(PEI)为原料,制备了端乙炔基聚醚酰亚胺改性的含硅芳炔(PEI-PSA)树脂及其与T300碳纤维平纹布的复合材料T300/PEI-PSA。通过动态热机械分析(DMA)和X射线能谱仪(EDS)研究了溶剂、溶液浓度、反应温度对预共聚反应的影响,确定了预共聚反应的最佳条件,得到了均匀分散的PEI-PSA树脂。通过红外光谱(FT-IR)、核磁共振氢谱(1 H-NMR)、差示扫描量热(DSC)、热失重(TG)、DMA和EDS等表征了PEI、PEI-PSA树脂及T300/PEI-PSA复合材料的结构和性能。结果表明,当PEI质量分数为20%时,PEI-PSA树脂浇铸体的弯曲强度达44.5 MPa,较PSA树脂浇铸体提高了90.2%;T300/PEI-PSA复合材料的弯曲强度达602.7 MPa,较T300/PSA复合材料的弯曲强度提高了124%。
[Abstract]:Using silicone aryne resin (PSA) and acetylene terminated polyetherimide (PEI) as raw materials, silicone aryne (PEI-PSA) resin modified by ethynyl polyetherimide and its composite T300 / PEI / PSA with T300 carbon fiber plain cloth were prepared by prepolymerization. The effects of solvent, solution concentration and reaction temperature on the prepolymerization were studied by dynamic thermomechanical analysis (DMA) and X-ray energy dispersive spectroscopy (EDS). The optimum conditions of prepolymerization were determined, and the uniformly dispersed PEI-PSA resin was obtained. The structure and properties of PEI,PEI-PSA resin and T300/PEI-PSA composites were characterized by infrared spectroscopy (FT-IR), nuclear magnetic resonance hydrogen spectroscopy (1 H-NMR), differential scanning thermogravimetric (DSC), thermogravimetric (TG), DMA and EDS. The results show that when the mass fraction of PEI is 20%, the bending strength of PEI-PSA resin castings is 44.5 MPa, which is 90.2% higher than that of PSA resin castings. The bending strength of PEI / PSA composites is 602.7 MPa, higher than that of PSA resin castings. The bending strength of PEI resin castings is 124% higher than that of PEI resin castings.
【作者单位】：华东理工大学特种功能高分子材料及相关技术教育部重点实验室;
【基金】：中央高校基本科研业务费专项资金(222201717001)
【分类号】：TB332;TQ324.21

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