双酚F/间苯二酚共聚型环氧树脂

采用间苯二酚、双酚F与环氧氯丙烷共聚合成一种高性能的环氧树脂,研究了不同反应温度、反应时间、双酚F/间苯二酚比例等条件对共聚环氧树脂结构材料性能的影响,确定了合成条件。结果表明所制备的双酚F/间苯二酚共聚型环氧树脂粘度比单纯双酚F环氧树脂低,其热固化结构材料的韧性、耐热性和拉伸强度较纯双酚F和间苯二酚型环氧树脂有明显提高。其最佳合成条件为:醚化温度为80℃,醚化时间5h,加碱闭环温度为60℃,加碱速度为4g/10min。间苯二酚与双酚F质量为20∶80时共聚树脂的综合性能最佳。其粘度为2 1Pa·s,比单纯的双酚F环氧树脂下降了42%;玻璃化温度为165℃,比纯双酚F环氧树脂提高了20℃;拉伸强度为102 3MPa,比纯双酚F环氧树脂提高了27%;弯曲强度为113 6MPa,比单纯的双酚F环氧树脂下降了18%。

BISPHENOL FORMALDEHYDE/RESORCIN COPOLYMERIZATION EPOXY RESIN

A new type of epoxy resin was obtained from resorcin、bisphenol formaldehyde(BPF) and epichlorhydrin. The effects of temperature,time and various content of BPF/resorcin on the properties of epoxy resin configuration material were investigated,and the synthetic condition was made. The results showed that the new epoxy resin had lower viscosity than BPF epoxy resin and its thermosetting configuration material had better toughness, heat-resistance and tensile strength than BPF or resorcin epoxy resin distinctly. The best synthetic condition was that the etherealization temperature was 80 ℃ and time was 5 hrs,closed loop temperature was 60 ℃,the speed of adding alkali was 4 g/10 min.The best BPF/resorcin copolymerization epoxy resin was synthesized when the ratio of BPF and resorcin was 20∶80 and it′s viscosity was 2.1 Pa·s,which was decreased by 42%,the Tg of the condensate was 165 ℃,which increase 20 ℃;and the tensile strength was 102.3 MPa,which increased 27% than BPF.epoxy resin but the bending strength was 113.6 MPa,which lower 18% than BPF.