期刊论文

Chen, D.(cdj@dhu.edu.cn)

中文

高分子材料科学与工程

1000-7555

2013

29

6

121-123+128

10.16865/j.cnki.1000-7555.2013.06.029

本校为其他机构

采用红外热成像技术研究了聚酯(PET)纤维的冷拉颈缩现象,选用一种特殊的18μm微焦镜头,形变过程中纤维的温度和直径变化能被同时检测到。红外热像图显示冷拉生热温度变化仅发生在纤维成颈区域,而且随着拉伸速率的提高,成颈区域温度升高可超过环境温度50℃~85 ℃。通过热力学的方法分析形变过程内能的变化,结果发现,内能随着拉伸不断减小,显示PET纤维在形变过程引发诱导结晶。

Infrared thermography was used to investigate the necking phenomena in cold-drawing process of PET fiber. The change of temperature and diameter during the necking process was determined accurately online by an infrared camera with 18 μm close-up lens. The infrared thermal images show that self-heating of the fiber only occurs in the necking region. Depending on the drawing rate, the temperature of the necking region is found to exceed the ambient temperature by 50°C~85°C. Internal energy change can be calculated by thermodynamic method. The...