Crystallization of Poly(butylene terephthalate) and Its Blends with Polyarylate

J. Runt; D. M. Miley; X. Zhang; K. P. Gallagher; K. McFeaters; J. Fishburn

doi:10.1021/ma00033a015

Crystallization of Poly(butylene terephthalate) and Its Blends with Polyarylate

J. Runt, D. M. Miley, X. Zhang, K. P. Gallagher, K. McFeaters, J. Fishburn

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Abstract

In this paper we explore the crystallization kinetics of poly(butylene terephthalate) (PBT), polyethylene terephthalate) (PET), and miscible blends of PBT with a polyarylate based on Bisphenol A and a 75/25 mole ratio of isophthalic and terephthalic acids. For PBT, a regime II → III transition is indicated near 210 °C (ΔT ∼ 30 °C) and the fold surface free energy (σ_e) was found to be in the range of 57-75 erg/cm². This leads to a work of chain folding (q) of ∼3-5 kcal/mol folds. Analysis of the crystallization data of van Antwerpen and van Krevelen for PET shows that crystallization occurs in regime II across a wide range of T_c· σ_e, was estimated to be ∼140 erg/cm² and q∼10 kcal/mol from their data. These values are roughly twice that of PBT, consistent with the longer flexible segments in the PBT repeat unit. Crystallization data for three PBT/PAr blends was analyzed using a modified Lauritzen-Hoffman method and compared to that of pure PBT.

Original language	English (US)
Pages (from-to)	1929-1934
Number of pages	6
Journal	Macromolecules
Volume	25
Issue number	7
DOIs	https://doi.org/10.1021/ma00033a015
State	Published - Mar 1 1992

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Crystallization of Poly(butylene terephthalate) and Its Blends with Polyarylate",

abstract = "In this paper we explore the crystallization kinetics of poly(butylene terephthalate) (PBT), polyethylene terephthalate) (PET), and miscible blends of PBT with a polyarylate based on Bisphenol A and a 75/25 mole ratio of isophthalic and terephthalic acids. For PBT, a regime II → III transition is indicated near 210 °C (ΔT ∼ 30 °C) and the fold surface free energy (σe) was found to be in the range of 57-75 erg/cm2. This leads to a work of chain folding (q) of ∼3-5 kcal/mol folds. Analysis of the crystallization data of van Antwerpen and van Krevelen for PET shows that crystallization occurs in regime II across a wide range of Tc· σe, was estimated to be ∼140 erg/cm2 and q∼10 kcal/mol from their data. These values are roughly twice that of PBT, consistent with the longer flexible segments in the PBT repeat unit. Crystallization data for three PBT/PAr blends was analyzed using a modified Lauritzen-Hoffman method and compared to that of pure PBT.",

author = "J. Runt and Miley, {D. M.} and X. Zhang and Gallagher, {K. P.} and K. McFeaters and J. Fishburn",

year = "1992",

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T1 - Crystallization of Poly(butylene terephthalate) and Its Blends with Polyarylate

AU - Runt, J.

AU - Miley, D. M.

AU - Zhang, X.

AU - Gallagher, K. P.

AU - McFeaters, K.

AU - Fishburn, J.

PY - 1992/3/1

Y1 - 1992/3/1

N2 - In this paper we explore the crystallization kinetics of poly(butylene terephthalate) (PBT), polyethylene terephthalate) (PET), and miscible blends of PBT with a polyarylate based on Bisphenol A and a 75/25 mole ratio of isophthalic and terephthalic acids. For PBT, a regime II → III transition is indicated near 210 °C (ΔT ∼ 30 °C) and the fold surface free energy (σe) was found to be in the range of 57-75 erg/cm2. This leads to a work of chain folding (q) of ∼3-5 kcal/mol folds. Analysis of the crystallization data of van Antwerpen and van Krevelen for PET shows that crystallization occurs in regime II across a wide range of Tc· σe, was estimated to be ∼140 erg/cm2 and q∼10 kcal/mol from their data. These values are roughly twice that of PBT, consistent with the longer flexible segments in the PBT repeat unit. Crystallization data for three PBT/PAr blends was analyzed using a modified Lauritzen-Hoffman method and compared to that of pure PBT.

AB - In this paper we explore the crystallization kinetics of poly(butylene terephthalate) (PBT), polyethylene terephthalate) (PET), and miscible blends of PBT with a polyarylate based on Bisphenol A and a 75/25 mole ratio of isophthalic and terephthalic acids. For PBT, a regime II → III transition is indicated near 210 °C (ΔT ∼ 30 °C) and the fold surface free energy (σe) was found to be in the range of 57-75 erg/cm2. This leads to a work of chain folding (q) of ∼3-5 kcal/mol folds. Analysis of the crystallization data of van Antwerpen and van Krevelen for PET shows that crystallization occurs in regime II across a wide range of Tc· σe, was estimated to be ∼140 erg/cm2 and q∼10 kcal/mol from their data. These values are roughly twice that of PBT, consistent with the longer flexible segments in the PBT repeat unit. Crystallization data for three PBT/PAr blends was analyzed using a modified Lauritzen-Hoffman method and compared to that of pure PBT.

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JO - Macromolecules

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Crystallization of Poly(butylene terephthalate) and Its Blends with Polyarylate

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