摘要
通过溶剂法,制备了双酚A型苯并噁嗪(BOZ-A)。采用预浸料模压成型工艺制备出聚乙烯醇缩醛纤维(PVAF)增强BOZ-A改性酚醛树脂(PF)模塑料。分别采用FT-IR、1H-NMR、DSC、SEM等对BOZ-A结构、BOZ-A/PF共混树脂固化行为和模塑料的力学性能、热性能进行了研究。结果表明,合成了预期结构的BOZ-A,噁嗪环成环率92.6%;BOZ-A/PF共混树脂工艺性良好,固化反应表观活化能为111.09 kJ/mol和73.73 kJ/mol;BOZ-A/PF质量比40/60时,模塑料性能最佳:收缩率、吸水性、冲击强度和弯曲强度分别为0.19%、0.187%、36.93 kJ/m^2、156.0 MPa,但其马丁耐热温度较改性前略有下降,为149.7℃。
A benzoxazine of bisphenol A（BOZ-A） was successfully synthesized by the solvent method, the preparation ofpolyvinyl acetal fiber （PVAF） reinforce phenolic resin was modified with BOZ-A by the mould pressing craft of presoak material. The structure of BOZ-A was analyzed by FT-I/L and 1H-NMR, the curing properties of BOZ-A/PF blends resin system, mechanics performance and thermal performance of the phenolic molding compound （PMC） was studied by DSC and SEM. The results revealed that the expected structure BOZ-A was successfully synthesized by the ring formation rate of 92.6%. The curing reaction apparent activation energy of BOZ-A/PF blends was 111.09 kJ/mol and 73.73 kJ/mol. When the mass ratio was 4：6, the PMC showed the best performance： the shrinkage rate was 0.19%; the water absorption was 0.187%; the impact strength was 36.93 kJ/m^2; Flexural strength was 156.0 MPa. Compared with unmodified phenolic resin, the Martin heat-resistance temperature of PMC was reduced to 149.7℃.
出处
《粘接》
CAS
2015年第8期59-63,共5页
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