Gas sorption and permeation of poly(γ-methyl glutamate)

✍ Scribed by Y. Tsujita; T. Sumitomo; M. Nomura; A. Takizawa

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 389 KB
• Volume: 30
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1985.070300701

✦ Synopsis

Sorption, permeation, and diffusion behaviors of poly(y-methyl glutamate) were examined in the light of superstructure including conformation. Highly crystalline PMG, cholesteric twisted structure, low crystalline PMG, which are all composed of a helix, and fl form PMG were prepared using cast solvent of chloroform, dichloromethane-dimethylformamide, and dimethylformamide and treating by formic acid, respectively. The large amount sorbed and the sorption capacity were interpreted by a n existence of a microvoid in PMG cast film from chloroform. On the other hand, fl form PMG had small amount sorbed. The sorption behavior was remarkably influenced by superstructure as well as conformation, while the effect of only conformation on the permeation behavior was recognized. A peculiar permeation was detected around 100°C for all the samples.