Experimental study on correlation between sound velocity and solute molecular weight in polyethylene glycol solution

• 来源期刊: 中国科学G辑(英文版)
• 年，卷（期）: 2009,（1）
• 页码范围: 82-86
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11433-009-0018-0

摘要

In this study, ultrasound grating was used to measure the sound velocity in solutions of ethylene glycol and polyethylene glycol with molecular weights of 200, 600, 2000, and 10000. We found Parthasarathy empirical rule, that is, sound velocity is higher in the solution of larger molecules, is invalid in the case of polyethylene glycol solution. We tried to provide a tentative explanation using the Flory-Krigbaum's chained block cloud model.