Study on the structure of nylon 6 films iodinated before forming. III. Fine structure variation of the amorphous film through deiodination

• Published in: Journal of applied polymer science 2009-07, Vol.113 (2), p.1141-1145
• Main Authors: Shin, Eun Joo, Lee, Sun Hee, Lee, Ju Yoen, Lee, Yang Hun
• Format: Article
• Language: English
• Subjects: Amorphous nylons; Applied sciences; Crystallization; Diffraction; Drying; Ethylene glycol; Exact sciences and technology; Fine structure; Forming; Miscellaneous; nylon 6; Organic polymers; Physicochemistry of polymers; Properties and characterization; Sodium; structure; X-ray
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.29935

Amorphous nylon 6 film iodinated before forming with an aqueous solution of 1.0N iodine-potassium iodide (I₂/KI) was deiodinated by dipping in water/ethylene glycol (EG) solutions of sodium thiosulfate with various EG contents and temperatures, washed with water, and dried at ambient condition. Structural variation through deiodination and the effects of the deiodination conditions were investigated by X-ray diffractometry and differential scanning calorimetry. The degree of swelling of the films immediately after deiodination and the time required to complete the deiodination were generally increased and decreased, respectively, with increasing temperature and EG content. The amorphous iodinated film was crystallized through deiodination. The α-crystal formation became easier with increasing temperature and EG content in the solution. The crystallinity of the films was higher after drying than before drying, suggesting that the drying induced further crystallization without any significant conversion of crystal type.