The effect of crystallinity and of the type of crystalline structure on the thermally initiated oxidation of hydrolytic polymers of caprolactam

✍ Scribed by B. Lánská; J. Baldrián; J. Biroš; J. Šebenda

• Book ID: 103072857
• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 260 KB
• Volume: 22
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(86)90172-2

✦ Synopsis

Under conditions where the rate of oxidation is not diffusion-controlled, the rate of oxidation of hydrolytic polymers of caprolactam is proportional to the amorphous fraction and independent of the nature of the crystalline phase. Sufficiently thin samples used for oxidation and prepared by cutting may be obtained only in a comparatively narrow crystallinity range: the cutting procedure reduces the crystallinity of highly crystalline polymers to 44% while, for samples with crystallinity of 26%, the content is raised to 37%. In all cases, the molecular weight of the polymer decreases.