Polymorphism in Nylon-11: Characterization using HTWAXS and HTFTIR

Autor:	Smitha S. Nair, Kohji Tashiro, C. Ramesh
Rok vydání:	2006
Předmět:	In situ Crystallography Nylon 11 Polymers and Plastics Polymorphism (materials science) Chemistry Scattering Organic Chemistry Materials Chemistry Fourier transform infrared spectroscopy Condensed Matter Physics
Zdroj:	Macromolecular Symposia. 242:216-226
ISSN:	1521-3900 1022-1360
DOI:	10.1002/masy.200651030
Popis:	Nylon-11 was crystallized into different crystalline phases by appropriate methods. The α phase was obtained by precipitating nylon-11 in 1,4-butanediol. The melt crystallized sample at 175 °C gave pseudohexagonal phase. The γ phase was obtained by casting nylon-11 in trifluroacetic acid (TFA). The change in the structure was monitored in situ by high temperature wide-angle X-ray scattering (HTWAXS) and high temperature Fourier transform infrared spectroscopy (HTFTIR). The studies have shown that nylon-11 is one of the few nylons that exhibit extensive degree of polymorphism. HTFTIR studies revealed, apart from the conformational differences between various phases of nylon-11, some information on the formation of γ phase.
Databáze:	OpenAIRE
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