Alternating-layered spherulites in thin-film poly(trimethylene terephthalate) by stepwise crystallization schemes

Yu Fan Chen; E. M. Woo; Pi Ling Wu

doi:10.1016/j.matlet.2007.03.076

Alternating-layered spherulites in thin-film poly(trimethylene terephthalate) by stepwise crystallization schemes

Yu Fan Chen, E. M. Woo, Pi Ling Wu

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Structuring of multi-layered spherulites in aryl polyester of poly(trimethylene terephthalate) (PTT) by stepwise crystallization was attempted. Characterization of feasibility was performed by polarized-light microscopy (POM), differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). Two- or three-layered spherulites could be developed in PTT by subjecting to stepwise crystallization. Sequence and number of layers in spherulites can be designed by altering the steps of temperatures with proper holding time. Time must be allocated properly in the multiple steps if three different textures are to be structured into one single PTT spherulite by stepwise crystallization. Coexistence of multiple lamellar thicknesses and various degrees of crystal perfection were supported by DSC results. The various crystalline regions of the layered spherulites in PTT develop upon stepwise crystallization exhibit the same unit cell as demonstrated by WAXD crystallographs.

Original language	English
Pages (from-to)	4911-4915
Number of pages	5
Journal	Materials Letters
Volume	61
Issue number	27
DOIs	https://doi.org/10.1016/j.matlet.2007.03.076
Publication status	Published - 2007 Nov

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2007.03.076

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title = "Alternating-layered spherulites in thin-film poly(trimethylene terephthalate) by stepwise crystallization schemes",

abstract = "Structuring of multi-layered spherulites in aryl polyester of poly(trimethylene terephthalate) (PTT) by stepwise crystallization was attempted. Characterization of feasibility was performed by polarized-light microscopy (POM), differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). Two- or three-layered spherulites could be developed in PTT by subjecting to stepwise crystallization. Sequence and number of layers in spherulites can be designed by altering the steps of temperatures with proper holding time. Time must be allocated properly in the multiple steps if three different textures are to be structured into one single PTT spherulite by stepwise crystallization. Coexistence of multiple lamellar thicknesses and various degrees of crystal perfection were supported by DSC results. The various crystalline regions of the layered spherulites in PTT develop upon stepwise crystallization exhibit the same unit cell as demonstrated by WAXD crystallographs.",

author = "Chen, {Yu Fan} and Woo, {E. M.} and Wu, {Pi Ling}",

note = "Funding Information: This work has been financially supported by a basic research grant (NSC-94 2216 E006 003 and NSC94-2622-E006-026-CC3) in consecutive years from Taiwan's National Science Council (NSC), to which the authors express their gratitude.",

year = "2007",

month = nov,

doi = "10.1016/j.matlet.2007.03.076",

language = "English",

volume = "61",

pages = "4911--4915",

journal = "Materials Letters",

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AU - Chen, Yu Fan

AU - Woo, E. M.

AU - Wu, Pi Ling

N1 - Funding Information: This work has been financially supported by a basic research grant (NSC-94 2216 E006 003 and NSC94-2622-E006-026-CC3) in consecutive years from Taiwan's National Science Council (NSC), to which the authors express their gratitude.

PY - 2007/11

Y1 - 2007/11

N2 - Structuring of multi-layered spherulites in aryl polyester of poly(trimethylene terephthalate) (PTT) by stepwise crystallization was attempted. Characterization of feasibility was performed by polarized-light microscopy (POM), differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). Two- or three-layered spherulites could be developed in PTT by subjecting to stepwise crystallization. Sequence and number of layers in spherulites can be designed by altering the steps of temperatures with proper holding time. Time must be allocated properly in the multiple steps if three different textures are to be structured into one single PTT spherulite by stepwise crystallization. Coexistence of multiple lamellar thicknesses and various degrees of crystal perfection were supported by DSC results. The various crystalline regions of the layered spherulites in PTT develop upon stepwise crystallization exhibit the same unit cell as demonstrated by WAXD crystallographs.

AB - Structuring of multi-layered spherulites in aryl polyester of poly(trimethylene terephthalate) (PTT) by stepwise crystallization was attempted. Characterization of feasibility was performed by polarized-light microscopy (POM), differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). Two- or three-layered spherulites could be developed in PTT by subjecting to stepwise crystallization. Sequence and number of layers in spherulites can be designed by altering the steps of temperatures with proper holding time. Time must be allocated properly in the multiple steps if three different textures are to be structured into one single PTT spherulite by stepwise crystallization. Coexistence of multiple lamellar thicknesses and various degrees of crystal perfection were supported by DSC results. The various crystalline regions of the layered spherulites in PTT develop upon stepwise crystallization exhibit the same unit cell as demonstrated by WAXD crystallographs.

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JO - Materials Letters

JF - Materials Letters

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Alternating-layered spherulites in thin-film poly(trimethylene terephthalate) by stepwise crystallization schemes

Abstract

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