Amorphous copolyester/polyoxymethylene blends: Thermal, Mechanical and morphological properties

K. L. Lam, A. Abu Bakar, Z. A Mohd Ishak, J. Karger-Kocsis

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Amorphous copolyester/polyoxymethylene (POM) blends were produced by melt blending covering the whole composition range. As copolyester poly(ethylene glycol-co-cyclohexane-1, 4-dimethanol terephathalate) (PETG) was selected. Injection and compression molded specimens of the blends were subjected to various rheological, thermal, thermomechanical and mechanical investigations. Many properties of these incompatible PETG/POM blends followed the additivity rule as a function of composition, such as melt flow index, density, tensile and flexural stiffnesses. However, the elongation at break, energy absorbed until tensile failure, flexural strength, notched Izod impact strength and static fracture toughness, K c showed lower values than either of the neat blend components. This was traced to the poor interfacial adhesion between PETG and POM. A co-continuous morphology was ascertained by the combination of selective extraction and scanning electron microscopy (SEM) for the blends PETG/POM=60/40 and =50/50 wt%/wt%. The tensile fracture surface of the 50/50 blend exhibited a fibrillar morphology owing to the injection molding-induced distortion of the initial co- continuous phase structure.

Original languageEnglish
Pages (from-to)570-578
Number of pages9
JournalKGK Kautschuk Gummi Kunststoffe
Volume57
Issue number11
Publication statusPublished - Nov 2004

Fingerprint

Impact strength
Phase structure
Cyclohexane
Chemical analysis
Injection molding
Bending strength
Polyethylene glycols
Fracture toughness
Elongation
Adhesion
Stiffness
Scanning electron microscopy
Hot Temperature
delrin
phenylethylthio-beta-galactopyranoside

Keywords

  • Amorphous copolyester (PETG)
  • Blend, Mechanical properties
  • Morphology
  • Polyoxymethylene (POM)

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Polymers and Plastics

Cite this

Amorphous copolyester/polyoxymethylene blends : Thermal, Mechanical and morphological properties. / Lam, K. L.; Bakar, A. Abu; Ishak, Z. A Mohd; Karger-Kocsis, J.

In: KGK Kautschuk Gummi Kunststoffe, Vol. 57, No. 11, 11.2004, p. 570-578.

Research output: Contribution to journalArticle

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