Structure, mechanical, and fracture properties of nanoreinforced and HNBR-toughened polyamide-6

Suchart Siengchin, J. Karger-Kocsis

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Hydrogenated nitrile rubber (HNBR) and synthetic nanofillers, viz. water-swellable sodium fluorohectorite (FH) and water dispersible boehmite alumina (BA), were used to toughen and reinforce polyamide-6 (PA-6). FH and BA were introduced in HNBR latex that was dried prior to melt mixing with PA-6. Binary blend (PA-6/HNBR) and ternary nanocomposites (PA-6/HNBR/nanofiller) were produced and their structure-property relationships studied. HNBR was coarsely and microscale dispersed in PA-6. FH, slightly intercalated, was present in PA-6 and in the PA-6/HNBR interphase, whereas BA was mostly located in the HNBR droplets. HNBR improved the ductility of the PA-6/HNBR blend at cost of stiffness and strength. The fracture toughness and energy, determined on notched Charpy specimens at different temperatures (T = -30°C, room temperature, and T = 80°C) were improved by blending with HNBR at 9 wt %. Additional incorporation of the nanofillers in 2.5 wt % enhanced the stiffness and strength of the PA-6/HNBR blend but reduced its ductility. The fracture toughness of the ternary nanocomposites was between those of PA-6 and PA-6/HNBR, whereas their fracture energy fairly agreed with that of the parent PA-6.

Original languageEnglish
Pages (from-to)897-902
Number of pages6
JournalJournal of Applied Polymer Science
Volume123
Issue number2
DOIs
Publication statusPublished - Jan 15 2012

Fingerprint

Nitriles
Rubber
Polyamides
Aluminum Oxide
Alumina
Fracture energy
Ductility
nylon 6
Fracture toughness
Nanocomposites
Stiffness
Elastomers
Water
Latexes
Sodium

Keywords

  • fracture toughness
  • hybrid nanocomposites
  • polyamide-6
  • structure-property relationships
  • toughening

ASJC Scopus subject areas

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

Cite this

Structure, mechanical, and fracture properties of nanoreinforced and HNBR-toughened polyamide-6. / Siengchin, Suchart; Karger-Kocsis, J.

In: Journal of Applied Polymer Science, Vol. 123, No. 2, 15.01.2012, p. 897-902.

Research output: Contribution to journalArticle

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