Osmotic Compressibility and Linewidth of (NBS-705) Polystyrene in Methyl Acetate
Static and dynamic properties of polymer solutions have recently been investigated by laser light scattering.1 The concentrations studied have ranged from the very dilute to the semi-dilute and concentrated regions. In our case, we have chosen to characterize polystyrene (NBS 705 standard, Mw = 179,300, Mw/Mn = 1.07) dissolved in methyl acetate. In this system, the upper and lower critical solution temperatures differ by only ~125°C and the theta temperatures by only ~70°C.2,3 Consequently, one can monitor the change in quality of the solvent over a range of temperatures which are experimentally accessible.
KeywordsLower Critical Solution Temperature Translational Diffusion Laser Light Scattering Methyl Acetate Polymer Coil
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- 1.See main lectures on “Static and Dynamic Properties of Polymer Solutions” by B. Chu in this volume.Google Scholar
- 7.M. Kurata, “Modern Industrial Chemistry”, Vol. 18, Asakura Publishing Co., Japan, 1975, p. 288.Google Scholar
- 8.S. Imai, Rep. Prog. Polymer Phys. Jpn. 8: 9 (1965).Google Scholar