Impact fracture and failure behavior of in-situ polymerized, ethylene/butyl acrylate rubber toughened polyamide-12

Emiliano Lievana, Andreas Wollny, Rolf Mülhaupt, J. Karger-Kocsis

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The fracture and failure behavior of in-situ polymerized polyamide-12 (PA-12) blends prepared by reactive extrusion were studied in instrumented high-speed (v = 1.2 m/s) impact bending tests using the linear elastic fracture mechanics approach. PA-12 was polymerized in presence (up to 9 wt.-%) of ethylene/butyl acrylate copolymers (E/BA) of varying BA content and melt viscosity. From the tests performed on injection molded specimens at ambient temperature and -40°C, respectively, the fracture toughness (Kd) and initiation fracture energy (Gd,i) were derived. Kd was less sensitive to either testing temperature or E/BA type and content. Gd,i, on the other hand, went through a maximum at room temperature and monotonously increased at T = -40°C as a function of modifier content. E/BA with higher melt viscosity and lower polarity (lower BA content) performed better than the lower melt viscosity, higher polarity E/BA counterpart. The dominant failure modes and their change both with temperature and modifier content were studied by fractography and discussed.

Original languageEnglish
Pages (from-to)266-271
Number of pages6
JournalMacromolecular Materials and Engineering
Volume287
Issue number4
DOIs
Publication statusPublished - Apr 26 2002

Fingerprint

Rubber
Polyamides
Ethylene
Copolymers
Viscosity
Temperature
Fractography
Fracture energy
Bending tests
Fracture mechanics
Failure modes
Extrusion
Fracture toughness
ethylene
nylon 12
n-butyl acrylate
Testing

Keywords

  • Failure
  • Fracture mechanics
  • In-situ rubber modification
  • Polyamide-12
  • Reactive extrusion
  • Ring-opening polymerization

ASJC Scopus subject areas

  • Materials Science(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Impact fracture and failure behavior of in-situ polymerized, ethylene/butyl acrylate rubber toughened polyamide-12. / Lievana, Emiliano; Wollny, Andreas; Mülhaupt, Rolf; Karger-Kocsis, J.

In: Macromolecular Materials and Engineering, Vol. 287, No. 4, 26.04.2002, p. 266-271.

Research output: Contribution to journalArticle

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