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- 2018
基于酚醛结构的聚三唑树脂及其复合材料
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Abstract:
设计并合成了一类含酚醛结构的聚三唑（NPTA）树脂，研究了其流变性能、固化行为、耐热性等，考察了NPTA树脂作为复合材料基体的可用性。研究结果表明，NPTA树脂具有良好的可加工性能，可低温固化成型，起始固化温度低于80℃，反应活化能较低；NPTA树脂的主链结构对其流变性能、固化行为和交联反应活化能影响不大。NPTA树脂固化物的耐热性受交联结构影响，玻璃化温度可高达278℃。T700碳纤维增强NPTA树脂（T700/NPTA）复合材料的力学性能优异，常温弯曲强度大于1 590 MPa，150℃下弯曲强度保持率超过68.6%。 A kind of novolac-based polytriazole (NPTA) resins was designed and synthesized from propargyl-functionalized novolac resin and diazides. The rheological properties, curing behavior and thermal properties of the novolac-based polytriazole resins were studied. The NPTA resins were also evaluated as the matrix for carbon fiber reinforced composites. The results reveal that the NPTA resins have good processiblity. The initial curing temperature is under 80℃, while the activation energy for the cross-linking is higher than the reported linear polytriazoles. The chain structures have little effect on the rheological properties, curing behavior and apparent activation energy of curing reaction of the NPTA resins. However, the thermal properties of the cured resins are greatly influenced by the structure of the crosslinked backbone. The glass transition temperature of the resins arrives at as high as 278℃. The flexural strengths of the T700 carbon fiber-reinforced NPTA composites (T700/NPTA) at ambient temperature reach the value higher than 1 590 MPa and their retention rates at 150℃ stand over 68.6%. 中央高校基本科研业务费专项资金（222201717001）
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