论文部分内容阅读
以双马来酰亚胺(BMI)作为苯并噁嗪(BZ)树脂的改性剂,采用非等温差示扫描量热(DSC)法及Freeman-Carroll法研究了改性BMI/BZ树脂体系的反应特性和固化反应动力学过程。结果表明:改性BMI/BZ树脂体系的凝胶时间随BMI用量增加而缩短;改性BMI/BZ树脂体系的固化反应只有一个放热峰,其峰顶温度(230℃左右)明显低于纯BZ体系,并且与BMI用量无关;改性BMI/BZ树脂体系的固化反应近似于1级反应,当w(BMI)=30%~50%时,所建立的固化反应动力学模型在10℃/min时能较好描述改性树脂体系的固化反应过程。
Using BMI as modifier of benzoxazine (BZ) resin, the modified BMI / BZ resin system was studied by non-isothermal differential scanning calorimetry (DSC) and Freeman-Carroll method The reaction characteristics and curing reaction kinetics. The results showed that the gel time of modified BMI / BZ resin system decreased with the increase of BMI. The curing reaction of modified BMI / BZ resin system had only one exothermic peak, and the peak temperature (about 230 ℃) was significantly lower than that of pure BMI / BZ resin system BZ system, and has nothing to do with the amount of BMI; curing reaction of the modified BMI / BZ resin system is similar to the first order reaction, when w (BMI) = 30% ~ 50%, the established curing reaction kinetics model at 10 ℃ / min can better describe the curing reaction of the modified resin system.