FTIR and X-ray study of polymorphs of nylon 11 and relation to ferroelectricity

Nylon‐11 polymorphs have been studied by x‐ray diffraction and by infrared spectroscopy. A γ or γ‐like phase of Nylon‐11 was produced by treating the metastable δ' phase with gaseous HCl or DCl and then exposing the resulting complex (amidonium salt) to 100% RH H2O or D2O vapor. An oriented for...

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Bibliographic Details
Published in:Journal of polymer science. Part B, Polymer physics Polymer physics, 1994-01, Vol.32 (2), p.365-369
Main Authors: Balizer, E., Fedderly, J., Haught, D., Dickens, B., Dereggi, A. S.
Format: Article
Language:English
Subjects:
Applied sciences
crystal transitions
deuteration
Exact sciences and technology
Fermi resonances
Nylon-11
Organic polymers
Physicochemistry of polymers
polymorphs
Properties and characterization
Structure, morphology and analysis
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Summary:Nylon‐11 polymorphs have been studied by x‐ray diffraction and by infrared spectroscopy. A γ or γ‐like phase of Nylon‐11 was produced by treating the metastable δ' phase with gaseous HCl or DCl and then exposing the resulting complex (amidonium salt) to 100% RH H2O or D2O vapor. An oriented form of the γ or γ‐like phase results from treatment of the oriented δ' phase, but stretching of the unoriented γ or γ‐like phase, obtained by treatment of the unoriented δ' phase, induces a transformation to the α phase stable at room temperature. The use of DCl and D2O produced highly deuterated samples with Fermi resonances indicating the relative strengths of the hydrogen bonds are weakest in the α phase, intermediate in the δ' phase and strongest in the γ or γ‐like phase. © 1994 John Wiley & Sons, Inc.
ISSN:0887-6266
1099-0488
DOI:10.1002/polb.1994.090320219