Morphological Changes in Flat-on and Edge-on Lamellae of Poly(Ethylene Succinate) Crystallized from Molten Thin Films

• Published in: Journal of macromolecular science. Physics Vol. 42; no. 3-4; pp. 889 - 899
• Main Authors: Kawashima, Keisuke, Kawano, Ryuichiro, Miyagi, Takayuki, Umemoto, Susumu, Okui, Norimasa
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 08.01.2003; Taylor & Francis
• Subjects: Applied sciences; Corrugated steps; Crystallization; Edge-on lamella; Exact sciences and technology; Flat-on lamella; Lozenge crystal; Organic polymers; Physicochemistry of polymers; Poly(ethylene succinate); Properties and characterization; Spherulite; Edge-on lamella; Flat-on lamella; Ester polymer; Lozenge crystal; Poly(ethylene succinate); Experimental study; Thin film; Spherulite; Melt crystallization; Corrugated steps; Aliphatic polymer; Polysuccinate; Crystal morphology; Isothermal crystallization
• ISSN: 0022-2348; 1525-609X
• DOI: 10.1081/MB-120021613

Corrugated crystal morphologies of poly(ethylene succinate) (PESU) with a bird-wing shape grew from the thin-film melt with the film thickness less than 1 μm. The center of the bird-wing-shaped crystal consisted of a lozenge crystal. Corrugated steps were observed in the direction of the short axis of the lozenge crystal (b-axis). Fibrous textures extended in the direction of the long axis of the lozenge crystal (a-axis), and they wrapped around the corrugated crystals. The corrugated crystals and the fibrous textures consisted of flat-on and edge-on lamellae, respectively. The wing-shaped morphology was constructed by combining the crystal growth with the flat-on and edge-on lamellae.