PBAMO的非等温结晶行为研究

Non-isothermal Crystallization Behaviors of PBAMO

用差示扫描量热仪(DSC)研究了聚3,3-二叠氮甲基氧杂丁环(PBAMO)在匀速降温过程中的结晶行为,结晶峰峰顶温度随降温速率的变化符合一阶指数衰减规律,结晶度在降温速率为2℃·min-1时达到最大,降温速率为5℃·min-1时,结晶速率达到最大。用Ozawa公式研究了非等温结晶行为,得到的Ozawa指数随温度的升高而增大,分为三个区域:(1)温度小于14℃,Ozawa指数小于3;(2)温度介于14～18℃,Ozawa指数介于3～4.12;(3)温度高于18℃,Ozawa指数接近5。根据Kissinger公式计算得到的结晶活化能为59.37kJ·mol-1。

The non-isothermal crystallization behaviors of poly （3,3-bis-azidomethyl oxetanc） （PBAMO） were studied during cooling with different constant cooling rates by using differential scanning calorimeter （ DSC ）. Results show that the relationship of peak temperature of crystallization process and cooling rate is expressed well via exponential decay equation, and the crystallinity reaches the maximum value when cooling rate equals 2 ℃·min^-1 while the fastest crystallization rate appears when cooling rate equals 5℃·min^-1. Ozawa exponent rn obtained by using Ozawa equation increases with temperature increasing and can be divided into three reglons： （1） T〈14℃,m〈3; （2） T=14-18℃,m =3-4.12; （3） T〉18℃,m approaches 5. The crystallization activation energy calculated from Kissinger equation is 59.37 kJ · mol^-1.