Details

Autor(en) / Beteiligte

• Mamun, Al

Titel

Morphological Variation of the Poly(ε-caprolactone) Crystals in Bulk, Thin and Ultrathin Films of Poly(ε-caprolactone)/Poly(vinyl methyl ether) Blends

Ist Teil von

• Polymer Science. Series A, 2022-08, Vol.64 (4), p.297-307

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Bulk, thin and ultrathin films with different thicknesses of neat poly(ε-caprolactone) and its blends with poly(vinyl methyl ether) were prepared on silicon substrate by spin coating from dilute solution with various composition ratios. The as-prepared film was melted above the equilibrium melt temperature and subsequently crystallized over wide temperature ranges. For the neat poly(ε-caprolactone) and its blends, the as-prepared films show band morphology with concentric extinction rings. For ultrathin films, the morphology is changed to a different shape depending on the crystallization conditions. The neat poly(ε-caprolactone) crystals show the truncated lozenge-shaped morphology with clear striation lines. For the blends, the truncated lozenge-shaped morphology modified by bending to regular and/or inverted S- or C-shaped crystals with temperature, and the poly(vinyl methyl ether) composition in the blend. For a certain composition ratio of blend, with lowering the crystallization temperature, the bending of the crystals increases significantly. The band to bend morphology of the poly(ε-caprolactone) crystals is found strong dependence on the crystallization temperature, composition ratio of the blends, and the thickness of the film.