Time-Resolved X-Ray Studies of Crystallization and Melting in Poly(ARYL Ether Ether Ketone)

作者: BS Hsiao , KH Gardner , None

DOI: 10.1007/978-94-011-1950-4_37

关键词: Lamellar structureCrystallizationTemperature jumpEtherX-rayPeekCrystallographyMaterials scienceSmall-angle X-ray scatteringCrystallinityOrganic chemistry

摘要: Time-resolved small-angle X-ray scattering (SAXS) experiments were conducted to study the crystallization and melting behavior of poly(aryl ether ketone), PEEK, using synchrotron radiation a dual-chamber temperature jump apparatus. The long period L, invariant Q lamellar thickness lc determined from correlation function data. During crystallization, it was found that L decreased, increased, lC remained about constant with time. decrease in explained by insertion within stacks, whereas increase attributed total degree crystallinity. melting, increased two-stage fashion: small below lower double-melting large above that. Both also but showed maximum before higher temperature. These results support model two populations lamellae different PEEK (proposed Bassett et al. [1]): primary are developed first bundle-like stacks narrower secondary inserted later lamellae.

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