摘要
红外热成像仪同步跟踪橡胶弹性体材料的循环形变过程,几种特殊的热效应特征能被观察到:(1)拉伸时明显的热弹转变效应,即橡胶试样在拉伸时要经历一个明显的温度降低,然后温度才逐渐升高;(2)试样初始拉伸-回复时,温度变量具有部分可逆性,而随后的拉伸-回复温度变化几乎完全可逆;(3)拉伸时温度升高具有速率依赖性,即拉伸速率越快,温升越高。热效应特征能反映形变分子聚集结构的变化,显然,橡胶的受力形变过程除构象变化以外,还具有其它特殊的分子结构变化。
When synchronous tracking the cyclic deformation process of rubber-like materials by infrared thermography,several particular thermal effects features were observed:( 1) there is a thermo-elastic inversion effect that the temperature has a tiny decrease at first and then increase during the stretching process.( 2) Temperature variation is partly reversible in the first loading-unloading cycle and totally reversible in the following cycles.( 3) Temperature rise upon drawing dependents on deformation rates,and the higher the extension rate is,the greater the temperature rise is. The thermal effects can reflect the change of molecular aggregation structure,and so it is obvious that besides conformation change,there is also special molecular structure change.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第8期115-118,共4页
Polymer Materials Science & Engineering
基金
湖南省教育厅科学研究项目(13C798)
关键词
红外热成像仪
橡胶
循环形变
热效应
infrared thermography
rubber
cyclic deformation
thermal effects
