Alteration of the mechanical and thermal properties of nylon 6/nylon 6,6 blends by nanoclay

Rabab Jarrar, Mahmood A. Mohsin, Yousef Haik

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Nylon 6 [N(6)], nylon 6,6 [N(6,6)], and their blends at different clay loadings were prepared. The mix was melted and injected into strip-shaped samples. Mechanical and thermal analyses were performed to investigate the effect of blending and the incorporated clay on the mechanical and thermal properties. Enhancements in the Young's modulus and hardness were obtained for all of the nanocomposites, with a 55% increase in Young's modulus after the addition of 6 wt % nanoclay, although the improvement in tensile strength depended on the blend ratio, with greatest effects on the 50% N(6)/50% N(6,6) blend with increases of 44 and 59% for 2 and 4% clay loadings, respectively. Thermogravimetric analysis showed an enhancement in the thermal properties in the 50% N(6)/50% N(6,6) blend at 2% clay loading, and the blend exhibited ductile behavior at this loading. Increases in the crystallization peak temperatures of 10-15° in N(6,6) and the two blends 30% N(6)/70% N(6,6) and 50% N(6)/50% N(6,6) were observed after the addition of the clay. The nanoclay enhanced the γ-/β-form crystals in N(6) and N(6,6) neat polymers and also in the blends. Fourier transform infrared spectroscopy FT-IR revealed the formation of hydrogen bonding and the possible formation of ionic bonds between the polymers and the nanoclay, which resulted in enhancements in the mechanical properties of the blends. The distribution of the nanoclay in the blend was well dispersed, as shown by X-ray diffraction analysis.

Original languageEnglish
Pages (from-to)1880-1890
Number of pages11
JournalJournal of Applied Polymer Science
Volume124
Issue number3
DOIs
Publication statusPublished - 5 May 2012
Externally publishedYes

Fingerprint

Clay
Thermodynamic properties
Mechanical properties
Polymers
Elastic moduli
Crystallization
X ray diffraction analysis
Fourier transform infrared spectroscopy
Thermogravimetric analysis
Nanocomposites
Hydrogen bonds
Tensile strength
Hardness
clay
nylon 6
Crystals
Temperature

Keywords

  • clay
  • FT-IR
  • mechanical properties
  • nanocomposites
  • thermal properties

ASJC Scopus subject areas

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

Cite this

Alteration of the mechanical and thermal properties of nylon 6/nylon 6,6 blends by nanoclay. / Jarrar, Rabab; Mohsin, Mahmood A.; Haik, Yousef.

In: Journal of Applied Polymer Science, Vol. 124, No. 3, 05.05.2012, p. 1880-1890.

Research output: Contribution to journalArticle

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AB - Nylon 6 [N(6)], nylon 6,6 [N(6,6)], and their blends at different clay loadings were prepared. The mix was melted and injected into strip-shaped samples. Mechanical and thermal analyses were performed to investigate the effect of blending and the incorporated clay on the mechanical and thermal properties. Enhancements in the Young's modulus and hardness were obtained for all of the nanocomposites, with a 55% increase in Young's modulus after the addition of 6 wt % nanoclay, although the improvement in tensile strength depended on the blend ratio, with greatest effects on the 50% N(6)/50% N(6,6) blend with increases of 44 and 59% for 2 and 4% clay loadings, respectively. Thermogravimetric analysis showed an enhancement in the thermal properties in the 50% N(6)/50% N(6,6) blend at 2% clay loading, and the blend exhibited ductile behavior at this loading. Increases in the crystallization peak temperatures of 10-15° in N(6,6) and the two blends 30% N(6)/70% N(6,6) and 50% N(6)/50% N(6,6) were observed after the addition of the clay. The nanoclay enhanced the γ-/β-form crystals in N(6) and N(6,6) neat polymers and also in the blends. Fourier transform infrared spectroscopy FT-IR revealed the formation of hydrogen bonding and the possible formation of ionic bonds between the polymers and the nanoclay, which resulted in enhancements in the mechanical properties of the blends. The distribution of the nanoclay in the blend was well dispersed, as shown by X-ray diffraction analysis.

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