Effect of reactive compatibilisation on the phase morphology and tensile properties of PA12/PP blends

S. Jose, S. V. Nair, S. Thomas, J. Karger-Kocsis

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Both uncompatibilized and compatibilized blends based on polyamide 12 (PA12) and isotactic polypropylene (PP) were prepared in a Brabender Plastograph®. The compatibiliser used was maleic anhydride functionalized polypropylene (PP-g-MA). Phase morphology of the blends was inspected in scanning electron microscope (SEM) on cryogenically fractured etched surfaces of the specimens. PA12/PP blends possessed a nonuniform and unstable morphology owing to the incompatibility between their constituents. Addition of compatibiliser improved the interfacial characteristics of the blends by retarding the rate of coalescence. So, the phase morphology became more fine, uniform, and stable. Tensile properties of both uncompatibilized and compatibilized blends were measured as a function of blend composition and compatibiliser concentration. Uncompatibilized blends displayed inferior mechanical properties to compatibilized ones; especially for those containing 40-60 wt % of PP. Reactive compatibilisation of blends was found to be efficient and improved the tensile strength of the blends considerably. Addition of PP-g-MA improved the interfacial adhesion, decreased the interfacial tension, and thereby, enhanced the tensile strength by 85%. Finally, various models were adopted to describe the tensile strength of the blends. The experimental data exhibited a reasonably good fit with Nielsen's first power law model.

Original languageEnglish
Pages (from-to)2640-2660
Number of pages21
JournalJournal of Applied Polymer Science
Volume99
Issue number5
DOIs
Publication statusPublished - Feb 5 2006

Fingerprint

Compatibilizers
Polypropylenes
Tensile properties
Polyamides
Tensile strength
Maleic Anhydrides
Maleic anhydride
Coalescence
Surface tension
nylon 12
Electron microscopes
Adhesion
Scanning
Mechanical properties
Chemical analysis

Keywords

  • Blends
  • Miscibility
  • Morphology
  • Reactive processing
  • Tensile properties

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Effect of reactive compatibilisation on the phase morphology and tensile properties of PA12/PP blends. / Jose, S.; Nair, S. V.; Thomas, S.; Karger-Kocsis, J.

In: Journal of Applied Polymer Science, Vol. 99, No. 5, 05.02.2006, p. 2640-2660.

Research output: Contribution to journalArticle

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