摘要
以相对黏度为2.6的聚酰胺510(PA 510)为研究对象,采用热重分析仪测试了PA 510的热稳定性,采用差示扫描量热仪系统研究了不同降温速率(Φ)下PA 510的非等温结晶过程,通过Jeziorny和Mo模型分析PA 510的非等温结晶动力学,并根据Kissinger方程计算PA 510的结晶活化能(ΔE)。结果表明:PA 510的热分解过程为典型的一步分解,在478.1℃时热分解速率最快;随着Φ的增加,PA 510的起始结晶温度、结晶峰值温度均向低温区移动,而结晶焓逐渐降低;PA 510的球晶生长以二维生长为主,在单位结晶时间内PA 510需要更高的结晶速率才能获得更高的结晶度;由Kissinger方程计算得出PA 510非等温结晶过程中的ΔE为-279.0 kJ/mol,高于聚酰胺6和聚酰胺66。
Using polyamide 510(PA 510)with a relative viscosity of 2.6 as the research object,the thermal stability of PA 510 was measured with a thermogravimetric analyzer,the non-isothermal crystallization process of PA 510 was systematically studied at different cooling rates(Φ)using a differential scanning calorimeter.The non-isothermal crystallization kinetics of PA 510 were analyzed by Jeziorny and Mo models,and the crystallization activation energy(ΔE)of PA 510 was calculated by Kissinger equation.The results showed that the thermal decomposition process of PA 510 was a typical one-step decomposition process,which provided the highest thermal decomposition rate at 478.1℃;the initial crystallization temperature and crystallization peak temperature of PA 510 tended to shift towards low temperature region and the crystallization enthalpy gradually decreased with the increase of Φ;the spherulite growth of PA 510 followed a two-dimensional growth model and PA 510 required a higher crystallization rate to obtain higher crystallinity within a unit crystallization time;and ΔE calculated by Kissinger equation was-279.0 kJ/mol during the non-isothermal crystallization process of PA 510,higher than those of polyamide 6 and polyamide 66.
作者
邓佶
DENG Ji(Guangdong Modern High-Tech Fiber Co.,Ltd.,Jieyang 515500)
出处
《合成纤维工业》
CAS
2023年第5期35-40,共6页
China Synthetic Fiber Industry
关键词
聚酰胺510
非等温结晶动力学
降温速率
结晶度
结晶活化能
polyamide 510
non-isothermal crystallization kinetics
cooling rate
crystallinity
crystallization activation energy
