Simultaneous biaxial drawing of poly (E-caprolactone) films

C. S. Ng; S. H. Teoh; T. S. Chung; D. W. Hutmacher

doi:10.1016/S0032-3861(99)00760-0

Simultaneous biaxial drawing of poly (E-caprolactone) films

C. S. Ng, S. H. Teoh^*, T. S. Chung, D. W. Hutmacher

^*Corresponding author for this work

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

58 Scopus citations

Abstract

The objective in our study was to investigate the biaxial drawing of Poly ((E)-caprolactone) (PCL), a bioerodable polyester that is flexible and elastomeric. PCL films were fabricated using solution casting and melt-pressing methods, and biaxially drawn to draw ratio of 3 X 3. The morphology, mechanical properties and gas permeability changes of the undrawn and drawn films were studied. Results showed that even at the low draw ratio used, a fibrillar morphology developed in the films, interspersed with undrawn material. The tensile strengths of the drawn films were also improved by 50-160%. The solution-cast films have higher gas permeabilities (20-fold), with Knudsen flow character, than melt pressed films. This higher gas permeability was attributed to the presence of microvoids and drawing defects. Permeability was reduced in the melt-pressed films and oxygen was found to permeate three times faster than nitrogen. Biaxial drawing increased the gas permeability slightly but selectivity remained unchanged. (C) 2000 Elsevier Science Ltd. All rights reserved.

Original language	English (US)
Pages (from-to)	5855-5864
Number of pages	10
Journal	Polymer
Volume	41
Issue number	15
DOIs	https://doi.org/10.1016/S0032-3861(99)00760-0
State	Published - Jul 2000
Externally published	Yes

Keywords

Biodegradable polymer
Characterisation
Simultaneous biaxial drawing

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/S0032-3861(99)00760-0

Cite this

@article{62fb437ff0b642f0acd1fc5006264fea,

title = "Simultaneous biaxial drawing of poly (E-caprolactone) films",

abstract = "The objective in our study was to investigate the biaxial drawing of Poly ((E)-caprolactone) (PCL), a bioerodable polyester that is flexible and elastomeric. PCL films were fabricated using solution casting and melt-pressing methods, and biaxially drawn to draw ratio of 3 X 3. The morphology, mechanical properties and gas permeability changes of the undrawn and drawn films were studied. Results showed that even at the low draw ratio used, a fibrillar morphology developed in the films, interspersed with undrawn material. The tensile strengths of the drawn films were also improved by 50-160%. The solution-cast films have higher gas permeabilities (20-fold), with Knudsen flow character, than melt pressed films. This higher gas permeability was attributed to the presence of microvoids and drawing defects. Permeability was reduced in the melt-pressed films and oxygen was found to permeate three times faster than nitrogen. Biaxial drawing increased the gas permeability slightly but selectivity remained unchanged. (C) 2000 Elsevier Science Ltd. All rights reserved.",

keywords = "Biodegradable polymer, Characterisation, Simultaneous biaxial drawing",

author = "Ng, {C. S.} and Teoh, {S. H.} and Chung, {T. S.} and Hutmacher, {D. W.}",

note = "Funding Information: The authors appreciate the assistance from Mr Mark Chan Wai Herng for assembling the Biaxial drawing apparatus and the advice from Dr Shieh Jyh-Jeng and Ms Lin Wen Hui on the permeability data analysis. The award of a Research Scholarship by the National University of Singapore to Mr C. S. Ng is also gratefully acknowledged.",

year = "2000",

month = jul,

doi = "10.1016/S0032-3861(99)00760-0",

language = "English (US)",

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pages = "5855--5864",

journal = "Polymer",

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TY - JOUR

T1 - Simultaneous biaxial drawing of poly (E-caprolactone) films

AU - Ng, C. S.

AU - Teoh, S. H.

AU - Chung, T. S.

AU - Hutmacher, D. W.

N1 - Funding Information: The authors appreciate the assistance from Mr Mark Chan Wai Herng for assembling the Biaxial drawing apparatus and the advice from Dr Shieh Jyh-Jeng and Ms Lin Wen Hui on the permeability data analysis. The award of a Research Scholarship by the National University of Singapore to Mr C. S. Ng is also gratefully acknowledged.

PY - 2000/7

Y1 - 2000/7

N2 - The objective in our study was to investigate the biaxial drawing of Poly ((E)-caprolactone) (PCL), a bioerodable polyester that is flexible and elastomeric. PCL films were fabricated using solution casting and melt-pressing methods, and biaxially drawn to draw ratio of 3 X 3. The morphology, mechanical properties and gas permeability changes of the undrawn and drawn films were studied. Results showed that even at the low draw ratio used, a fibrillar morphology developed in the films, interspersed with undrawn material. The tensile strengths of the drawn films were also improved by 50-160%. The solution-cast films have higher gas permeabilities (20-fold), with Knudsen flow character, than melt pressed films. This higher gas permeability was attributed to the presence of microvoids and drawing defects. Permeability was reduced in the melt-pressed films and oxygen was found to permeate three times faster than nitrogen. Biaxial drawing increased the gas permeability slightly but selectivity remained unchanged. (C) 2000 Elsevier Science Ltd. All rights reserved.

AB - The objective in our study was to investigate the biaxial drawing of Poly ((E)-caprolactone) (PCL), a bioerodable polyester that is flexible and elastomeric. PCL films were fabricated using solution casting and melt-pressing methods, and biaxially drawn to draw ratio of 3 X 3. The morphology, mechanical properties and gas permeability changes of the undrawn and drawn films were studied. Results showed that even at the low draw ratio used, a fibrillar morphology developed in the films, interspersed with undrawn material. The tensile strengths of the drawn films were also improved by 50-160%. The solution-cast films have higher gas permeabilities (20-fold), with Knudsen flow character, than melt pressed films. This higher gas permeability was attributed to the presence of microvoids and drawing defects. Permeability was reduced in the melt-pressed films and oxygen was found to permeate three times faster than nitrogen. Biaxial drawing increased the gas permeability slightly but selectivity remained unchanged. (C) 2000 Elsevier Science Ltd. All rights reserved.

KW - Biodegradable polymer

KW - Characterisation

KW - Simultaneous biaxial drawing

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U2 - 10.1016/S0032-3861(99)00760-0

DO - 10.1016/S0032-3861(99)00760-0

M3 - Article

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SN - 0032-3861

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EP - 5864

JO - Polymer

JF - Polymer

IS - 15

ER -

Simultaneous biaxial drawing of poly (E-caprolactone) films

Abstract

Keywords

ASJC Scopus subject areas

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