Miscibility and crystallization behaviors of poly(3-hydroxybutyrate-co-11%- 4-hydroxybutyrate)/Poly(3-hydroxybutyrate-co-33%-4-hydroxybutyrate) blends

Zhiyuan Lan, Jueyu Pan, Xiaojuan Wang, Jianyun He, Kaitian Xu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Biopolyesters poly(3-hydroxybutyrate-co-4-hydroxybutyrate) with an 11 mol % 4HB content [P(3HB-co-11%-4HB)] and a 33 mol % 4HB content [P(3HB-co-33%-4HB)] were blended by a solvent-casting method. The thermal properties were investigated with differential scanning calorimetry. The single glass-transition temperature of the blends revealed that the two components were miscible when the content of P(3HB-co-33%-4HB) was less than 30% or more than 70 wt %. The blends, however, were immiscible when the P(3HB-co-33%-4HB) content was between 30 and 70%. The miscibility of the blends was also confirmed by scanning electron microscopy morphology observation. In the crystallite structure study, X-ray diffraction patterns demonstrated that the crystallites of the blends were mainly from poly(3-hydroxybutyrate) units. With the addition of P(3HB-co-33%-4HB), larger crystallites with lower crystallization degrees were induced. Isothermal crystallization was used to analyze the melting crystallization kinetics. The Avrami exponent was kept around 2; this indicated that the crystallization mode was not affected by the blending. The equilibrium melting temperature decreased from 144 to 140°C for the 80/20 and 70/30 blends P(3HB-co-11%-4HB)/P(3HB-co-33%-4HB). This hinted that the crystallization tendency decreased with a higher P(3HB-co-33%-4HB) content.

Original languageEnglish (US)
Pages (from-to)3467-3475
Number of pages9
JournalJournal of Applied Polymer Science
Volume119
Issue number6
DOIs
StatePublished - Mar 15 2011

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Hydroxybutyrates
Crystallization
Solubility
Crystallites
Crystallization kinetics
Diffraction patterns
Melting point
Differential scanning calorimetry
Casting
Melting
Thermodynamic properties
X ray diffraction
Scanning electron microscopy
poly-beta-hydroxybutyrate
poly(3-hydroxybutyrate-co-4-hydroxybutyrate)

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Cite this

@article{bd000243966b44c09600183b56740e7f,
title = "Miscibility and crystallization behaviors of poly(3-hydroxybutyrate-co-11{\%}- 4-hydroxybutyrate)/Poly(3-hydroxybutyrate-co-33{\%}-4-hydroxybutyrate) blends",
abstract = "Biopolyesters poly(3-hydroxybutyrate-co-4-hydroxybutyrate) with an 11 mol {\%} 4HB content [P(3HB-co-11{\%}-4HB)] and a 33 mol {\%} 4HB content [P(3HB-co-33{\%}-4HB)] were blended by a solvent-casting method. The thermal properties were investigated with differential scanning calorimetry. The single glass-transition temperature of the blends revealed that the two components were miscible when the content of P(3HB-co-33{\%}-4HB) was less than 30{\%} or more than 70 wt {\%}. The blends, however, were immiscible when the P(3HB-co-33{\%}-4HB) content was between 30 and 70{\%}. The miscibility of the blends was also confirmed by scanning electron microscopy morphology observation. In the crystallite structure study, X-ray diffraction patterns demonstrated that the crystallites of the blends were mainly from poly(3-hydroxybutyrate) units. With the addition of P(3HB-co-33{\%}-4HB), larger crystallites with lower crystallization degrees were induced. Isothermal crystallization was used to analyze the melting crystallization kinetics. The Avrami exponent was kept around 2; this indicated that the crystallization mode was not affected by the blending. The equilibrium melting temperature decreased from 144 to 140°C for the 80/20 and 70/30 blends P(3HB-co-11{\%}-4HB)/P(3HB-co-33{\%}-4HB). This hinted that the crystallization tendency decreased with a higher P(3HB-co-33{\%}-4HB) content.",
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Miscibility and crystallization behaviors of poly(3-hydroxybutyrate-co-11%- 4-hydroxybutyrate)/Poly(3-hydroxybutyrate-co-33%-4-hydroxybutyrate) blends. / Lan, Zhiyuan; Pan, Jueyu; Wang, Xiaojuan; He, Jianyun; Xu, Kaitian.

In: Journal of Applied Polymer Science, Vol. 119, No. 6, 15.03.2011, p. 3467-3475.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Miscibility and crystallization behaviors of poly(3-hydroxybutyrate-co-11%- 4-hydroxybutyrate)/Poly(3-hydroxybutyrate-co-33%-4-hydroxybutyrate) blends

AU - Lan, Zhiyuan

AU - Pan, Jueyu

AU - Wang, Xiaojuan

AU - He, Jianyun

AU - Xu, Kaitian

PY - 2011/3/15

Y1 - 2011/3/15

N2 - Biopolyesters poly(3-hydroxybutyrate-co-4-hydroxybutyrate) with an 11 mol % 4HB content [P(3HB-co-11%-4HB)] and a 33 mol % 4HB content [P(3HB-co-33%-4HB)] were blended by a solvent-casting method. The thermal properties were investigated with differential scanning calorimetry. The single glass-transition temperature of the blends revealed that the two components were miscible when the content of P(3HB-co-33%-4HB) was less than 30% or more than 70 wt %. The blends, however, were immiscible when the P(3HB-co-33%-4HB) content was between 30 and 70%. The miscibility of the blends was also confirmed by scanning electron microscopy morphology observation. In the crystallite structure study, X-ray diffraction patterns demonstrated that the crystallites of the blends were mainly from poly(3-hydroxybutyrate) units. With the addition of P(3HB-co-33%-4HB), larger crystallites with lower crystallization degrees were induced. Isothermal crystallization was used to analyze the melting crystallization kinetics. The Avrami exponent was kept around 2; this indicated that the crystallization mode was not affected by the blending. The equilibrium melting temperature decreased from 144 to 140°C for the 80/20 and 70/30 blends P(3HB-co-11%-4HB)/P(3HB-co-33%-4HB). This hinted that the crystallization tendency decreased with a higher P(3HB-co-33%-4HB) content.

AB - Biopolyesters poly(3-hydroxybutyrate-co-4-hydroxybutyrate) with an 11 mol % 4HB content [P(3HB-co-11%-4HB)] and a 33 mol % 4HB content [P(3HB-co-33%-4HB)] were blended by a solvent-casting method. The thermal properties were investigated with differential scanning calorimetry. The single glass-transition temperature of the blends revealed that the two components were miscible when the content of P(3HB-co-33%-4HB) was less than 30% or more than 70 wt %. The blends, however, were immiscible when the P(3HB-co-33%-4HB) content was between 30 and 70%. The miscibility of the blends was also confirmed by scanning electron microscopy morphology observation. In the crystallite structure study, X-ray diffraction patterns demonstrated that the crystallites of the blends were mainly from poly(3-hydroxybutyrate) units. With the addition of P(3HB-co-33%-4HB), larger crystallites with lower crystallization degrees were induced. Isothermal crystallization was used to analyze the melting crystallization kinetics. The Avrami exponent was kept around 2; this indicated that the crystallization mode was not affected by the blending. The equilibrium melting temperature decreased from 144 to 140°C for the 80/20 and 70/30 blends P(3HB-co-11%-4HB)/P(3HB-co-33%-4HB). This hinted that the crystallization tendency decreased with a higher P(3HB-co-33%-4HB) content.

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