An Apparatus for Dynamic Birefringence Measurement under Oscillatory Shear Flow Using an Oblique Laser Beam
An Apparatus for Dynamic Birefringence Measurement under Oscillatory Shear Flow Using an Oblique Laser Beam
复制标题
使用倾斜激光束在振荡剪切流下进行动态双折射测量的装置
DOI：
10.1678/rheology.37.205
复制
发表时间：
2009
影响因子：
1.3
通讯作者：
Tadashi Inoue
中科院分区：
文献类型：
--
作者：
Chieko Hayashi;Tadashi Inoue
开发了一种使用倾斜激光束同时测量振荡剪切流下动态双折射和动态粘弹性的新装置。通过对聚苯乙烯溶液和聚苯乙烯熔体的测量证实了该设备的可靠性，已知应力光学规则对此保持有效。估计的应力光学系数值与文献数据相当一致。对具有线性线状形状的模型超分子系统的测量表明，应力光学规则在高频下被破坏，表明该超分子系统不能被视为简单的普通聚合物系统。这一初步结果表明了该装置在讨论复杂系统应力的分子起源方面所具有的优势。
A new apparatus for simultaneous measurements of dynamic birefringence and dynamic viscoelasticity under oscillatory shear flow was developed with an oblique laser beam. Reliability of the apparatus was confirmed with the measurements on polystyrene solution and polystyrene melt, for which the stress-optical rule is known to hold valid. The values of the estimated stress-optical coefficient were reasonably in accord with the literature data. The measurement on a model supramolecular system having a linear thread-like shape showed that the breakdown of stress-optical rule at high frequencies, suggesting that this supramolecular system cannot be regarded as a simple ordinary polymeric system. This preliminary result indicates the promised advantage of the apparatus to discuss the molecular origin of the stress for complex systems.