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中文摘要：
将粒子示踪（particle tracking velocimetry，PTV）技术与高温锥板一平板流变仪结合，研究了聚氧化乙烯（poly（ethylene oxide），PEO）熔体的延迟壁滑行为．当高于某一临界应变时，PEO熔体在剪切停止后，上板壁附近呈现宏观运动．这是首次利用高温PTV装置观测到延迟壁滑现象．延迟壁滑现象无法用deGennes的壁滑模型解释，但可以用王十庆提出的分子理论解释．
英文摘要：
The delayed slip behavior of entangled poly（ethyiene oxide） （PEO） melts was studied by means of the particle tracking velocimetric （PTV） technique in a high temperature cone-plate geometry. The PEO melts exhibited macroscopic motions near the top wall after shear cessation, when the imposed strain was larger than a critical value. It is the first time that delayed slip was observed with a high-temperature PTV device. This delayed slip behavior cannot be explained by de Gennes slip model, but can be rationalized by Wang＇s molecular theory.
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