Multishell Oblate Spheroid Growth in Poly(trimethylene terephthalate) Banded Spherulites

• DOI: 10.1021/acs.macromol.7b00838
• Publication Date: 2017-07-25T19:01:50Z
• Authors: Graecia Lugito; Eamor M. Woo
• Keywords: Spherulite (polymer physics); Spheroid; Oblate spheroid; Discontinuity (linguistics)

Unique interior dissection coupled with selective etching techniques for exposing the interiors of poly(trimethylene terephthalate) (PTT) banded spherulites. Three PTT spherulite types are present, originating from different nuclei geometries and corresponding to assemblies lamellae, but all possess similar multishell spheroid layered structures, each their layer thickness exactly equal optical interband spacing. Interior lamellae alternatingly intersected mutually perpendicular orientations clear discontinuity, which evidently disagrees conventional models continuous helical twisting banding. 3D also have been fittingly correlated top-surface banding patterns.