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Transformations in the cellulose nitrate structure in the process of solvent vapor sorption

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Summary

A technique permitting to record structure transformations in a polymer film by X-ray analysis directly in the process of low molecular weight solvent vapor sorption is developed. Applying it to cellulose nitrate (CN) — ethyl acetate (EA) system evidences the formation of a set of crystalline reflections in the initially amorphous film at a definite EA vapor activity (p/ps≈ 0.6), the reflections disappearing after the removal of EA. The ordering of structure is associated with molecular complexes (MC) formation, MC being thermodynamically stable within a certain p/ps range. It proves the validity of a qualitative phase diagram offered for CN — EA system (6). The peculiarities of MC formation and destruction are bound to assist in interpretation of sorption and diffusion properties of the system in question.

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Authors and Affiliations

  1. Institute of Physical Chemistry, Academy of Sciences of the USSR, Leninsky Prospect, 31, SU-117915, Moscow, USSR

    A. Ye. Chalych & Ye. D. Popova

  2. Institute of Crystallography, Academy of Sciences of the USSR, Leninsky Prospect, 59, SU-117915, Moscow, USSR

    A. N. Popov & D. M. Kheiker

Authors
  1. A. Ye. Chalych
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  2. Ye. D. Popova
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  3. A. N. Popov
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  4. D. M. Kheiker
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Chalych, A.Y., Popova, Y.D., Popov, A.N. et al. Transformations in the cellulose nitrate structure in the process of solvent vapor sorption. Polymer Bulletin 16, 215–221 (1986). https://doi.org/10.1007/BF00955494

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  • DOI: https://doi.org/10.1007/BF00955494

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