纺织材料的热转变温度试验方法

Test method for thermal transition temperature of textile material

用差示扫描量热仪 (DSC)测定纺织材料的热转变温度 ,如熔融温度、结晶温度、玻璃化转变温度时发现 :纺织材料的外推起始温度和熔融温度随升温速率增大向高温方向偏移 ;试样的形状影响转变温度 ;试样越多 ,峰顶温度向高温方向偏移 ,但外推起始温度不变 ;载气的流量越大 ,DSC曲线的斜移程度越严重。

While measuring thermal transition temperature of textile material by differential scanning calorimetry (DSC), such as melting, crystallization and glass transition temperature, it is discovered that the extrapolated onset temperature and melting temperature deviate to high temperature direction with raising heat-up rate. Sample shape influences transition temperature. The more sample is the more the peak temperature deviates to high temperature, but extrapolated onset temperature is constant. The more flow rate of air is, the more sloping DSC curve is.