Spherulitic growth rates of poly(3,3-diethyl oxetane)

✍ Scribed by M.A. Gómez; J.G. Fatou; A. Bello

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 916 KB
• Volume: 22
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(86)90166-7

✦ Synopsis

Growth rates of crystallized fractions of poly(3,3-diethyl oxetane) covering the range ~n = 10,000-800,000 have been studied by polarized light microscopy at crystallization temperatures from 51.5 to 58~C. It has been found that the growth is linear and only spherulites are formed in the temperature range examined. The growth rate temperature coel~cient was analyzed by using nucleation theory and a variation of the basal interfacial free energy with molecular weight was found. Comparison between dilatometric and growth data revealed that the overall rate and growth rate temperature coefficient are approximately the same.