Effects of α-form or β-form nuclei on polymorphic crystalline morphology of poly(butylene adipate)

Ming Chien Wu, Eamor Woo

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The effects of a-form and β-form nuclei on polymorphic morphology of poly (butylene adipate) (PBA)upon recrystallization from the molten state up to various Tmax values were examined by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and polarized light microscopy (PLM). In this study, PBA with complex melting and polymorphism behaviour was used as a model for examining different types and extents of residual nuclei. As the PBA initially containing the sole α-crystal was brought to a molten state of various Tmax, the extents of trace α-form crystal nuclei varied and were dependent on Tmax. Furthermore, it did not matter whether, initially, the PBA α-or β-form crystals (or both) because only a single type of α-nuclei could be left upon treatment to the molten liquid state at Tmax. Therefore, only the α-crystal in PBA had 'memory capacity' in the molten liquid state while the β-crystal did not. This was so because the latter had been completely transformed into the solid state prior to being heated into a liquid. PBA crystallized before α-nuclei could pack into α-crystal regardless of the crystallization temperature (Tc). For recrystallization from molten PBA without any nuclei, the crystalline polymorphism was correspondingly influenced by Tc.

Original languageEnglish
Pages (from-to)1681-1688
Number of pages8
JournalPolymer International
Volume54
Issue number12
DOIs
Publication statusPublished - 2005 Nov 1

Fingerprint

Molten materials
Crystalline materials
Crystals
Polymorphism
Liquids
Crystallization
Light polarization
Optical microscopy
butylene glycol adipic acid polyester
Differential scanning calorimetry
Melting
Data storage equipment
X ray diffraction
Temperature

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics

Cite this

@article{e5b616e29919411c8aeff83efd219fe6,
title = "Effects of α-form or β-form nuclei on polymorphic crystalline morphology of poly(butylene adipate)",
abstract = "The effects of a-form and β-form nuclei on polymorphic morphology of poly (butylene adipate) (PBA)upon recrystallization from the molten state up to various Tmax values were examined by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and polarized light microscopy (PLM). In this study, PBA with complex melting and polymorphism behaviour was used as a model for examining different types and extents of residual nuclei. As the PBA initially containing the sole α-crystal was brought to a molten state of various Tmax, the extents of trace α-form crystal nuclei varied and were dependent on Tmax. Furthermore, it did not matter whether, initially, the PBA α-or β-form crystals (or both) because only a single type of α-nuclei could be left upon treatment to the molten liquid state at Tmax. Therefore, only the α-crystal in PBA had 'memory capacity' in the molten liquid state while the β-crystal did not. This was so because the latter had been completely transformed into the solid state prior to being heated into a liquid. PBA crystallized before α-nuclei could pack into α-crystal regardless of the crystallization temperature (Tc). For recrystallization from molten PBA without any nuclei, the crystalline polymorphism was correspondingly influenced by Tc.",
author = "Wu, {Ming Chien} and Eamor Woo",
year = "2005",
month = "11",
day = "1",
doi = "10.1002/pi.1922",
language = "English",
volume = "54",
pages = "1681--1688",
journal = "Polymer International",
issn = "0959-8103",
publisher = "John Wiley and Sons Ltd",
number = "12",

}

Effects of α-form or β-form nuclei on polymorphic crystalline morphology of poly(butylene adipate). / Wu, Ming Chien; Woo, Eamor.

In: Polymer International, Vol. 54, No. 12, 01.11.2005, p. 1681-1688.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of α-form or β-form nuclei on polymorphic crystalline morphology of poly(butylene adipate)

AU - Wu, Ming Chien

AU - Woo, Eamor

PY - 2005/11/1

Y1 - 2005/11/1

N2 - The effects of a-form and β-form nuclei on polymorphic morphology of poly (butylene adipate) (PBA)upon recrystallization from the molten state up to various Tmax values were examined by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and polarized light microscopy (PLM). In this study, PBA with complex melting and polymorphism behaviour was used as a model for examining different types and extents of residual nuclei. As the PBA initially containing the sole α-crystal was brought to a molten state of various Tmax, the extents of trace α-form crystal nuclei varied and were dependent on Tmax. Furthermore, it did not matter whether, initially, the PBA α-or β-form crystals (or both) because only a single type of α-nuclei could be left upon treatment to the molten liquid state at Tmax. Therefore, only the α-crystal in PBA had 'memory capacity' in the molten liquid state while the β-crystal did not. This was so because the latter had been completely transformed into the solid state prior to being heated into a liquid. PBA crystallized before α-nuclei could pack into α-crystal regardless of the crystallization temperature (Tc). For recrystallization from molten PBA without any nuclei, the crystalline polymorphism was correspondingly influenced by Tc.

AB - The effects of a-form and β-form nuclei on polymorphic morphology of poly (butylene adipate) (PBA)upon recrystallization from the molten state up to various Tmax values were examined by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and polarized light microscopy (PLM). In this study, PBA with complex melting and polymorphism behaviour was used as a model for examining different types and extents of residual nuclei. As the PBA initially containing the sole α-crystal was brought to a molten state of various Tmax, the extents of trace α-form crystal nuclei varied and were dependent on Tmax. Furthermore, it did not matter whether, initially, the PBA α-or β-form crystals (or both) because only a single type of α-nuclei could be left upon treatment to the molten liquid state at Tmax. Therefore, only the α-crystal in PBA had 'memory capacity' in the molten liquid state while the β-crystal did not. This was so because the latter had been completely transformed into the solid state prior to being heated into a liquid. PBA crystallized before α-nuclei could pack into α-crystal regardless of the crystallization temperature (Tc). For recrystallization from molten PBA without any nuclei, the crystalline polymorphism was correspondingly influenced by Tc.

UR - http://www.scopus.com/inward/record.url?scp=28444452598&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28444452598&partnerID=8YFLogxK

U2 - 10.1002/pi.1922

DO - 10.1002/pi.1922

M3 - Article

VL - 54

SP - 1681

EP - 1688

JO - Polymer International

JF - Polymer International

SN - 0959-8103

IS - 12

ER -