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Relationship between segmental anisotropy in polarizability and stationary ultrasonically induced birefringence in polymer solutions |
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| Authors: | Hiroyasu Nomura Satoru Ando Tatsuro Matsuoka Shinobu Koda |
| Institution: | a Laboratory of Chemistry, Department of Natural Science, School of Science and Technology, Tokyo Denki University, Hatoyama, Hiki-Gun, Saitama 350-0394, Japan b Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan |
| Abstract: | Stationary ultrasonically induced birefringence in various polymer solutions was measured in order to investigate its relation to the anisotropy in polarizability of a polymer chain. From the concentration dependence of stationary ultrasonically induced birefringence in polystyrene–toluene, polycarbonate–chloroform and polybutadiene–toluene solutions, the intrinsic values of the birefringence were obtained. A linear relationship between the intrinsic value of the birefringence per segment and the segmental anisotropy in polarizability was obtained. In aqueous solutions of polyelectrolytes, sodium polystyrenesulfonate and tetramethylammonium polystyrenesulfonate, the birefringence decreased with ionic strength by the addition of the salts. The stationary birefringence per ultrasonic intensity for all polymer solutions investigated here decreased with increasing frequency. |
| Keywords: | Stationary ultrasonically induced birefringence Segmental anisotrophy Polymer solution Polyelectrolyte |
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