二恶唑啉改性酚醛树脂固化动力学研究

摘要

The non-isothermal differential scanning calorimetry(DSC) program was used to study the curing phenomenon of PF2828(cured by hexamethylenetetramine) and the bisoxazoline(1,3–PBO) modified phenolic resin(PF) (mass ratio of 1,3–PBO and PF is 60∶40)of different amount of α,α–dibromo-p-xylene (mass fraction is 0.5 phr,1.5 phr). The Kissinger method and Ozawa method were used to research the curing kinetics of them,the curing reaction activation energy was calculated. The results show that the use of bisoxazoline and α,α–Dibromo-p-xylene can accelerate the curing reaction and reduce the curing reaction activation energy. The curing reaction is the most easy when the amount of catalyst is 1.5 phr.%采用非等温差示扫描量热(DSC)法探讨了固化剂为六次甲基四胺的酚醛树脂(PF2828)和二恶唑啉(1，3–PBO)固化酚醛树脂(PF)(1，3–PBO 与 PF 质量比为40∶60)在不同量α，α–二溴对二甲苯(质量份数分别为0.5份，1.5份)作用下的固化行为，运用 Kissinger 法和 Ozawa 方法对其固化动力学进行研究，得到了固化反应活化能。结果表明，二恶唑啉和催化剂α，α–二溴对二甲苯的使用，可以加速 PF 的固化反应，降低了 PF 固化反应的活化能；当催化剂用量为1.5份时，最易于改性 PF 固化反应的进行。