Adhesion and micromechanical deformation processes in PLA/CaSO 4 composites

Balázs Imre, Gergely Keledi, Károly Renner, J. Móczó, Marius Murariu, Philippe Dubois, B. Pukánszky

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

PLA/CaSO 4 composites were prepared from uncoated and stearic acid coated filler particles in a wide composition range. The strength of interfacial adhesion was estimated quantitatively with three independent methods. Structure was characterized by DSC, XRD and SEM measurements, while mechanical properties by tensile and instrumented impact tests. The results proved that adhesion is twice as strong in composites prepared with the uncoated particles than in those containing the coated filler. Coating changes also local deformation processes around the particles. Although debonding is the dominating micromechanical deformation process in all composites, local plastic deformation is larger around coated particles. The extent of this deformation depends very much also on the local distribution of particles. The final properties and performance of the composites depend unambiguously on the micromechanical deformation processes occurring during loading, on debonding and the subsequent plastic deformation. Stearic acid used for the coating of the filler seems to dissolve in the polymer and locally change its properties.

Original languageEnglish
Pages (from-to)759-767
Number of pages9
JournalCarbohydrate Polymers
Volume89
Issue number3
DOIs
Publication statusPublished - Jul 1 2012

Fingerprint

Adhesion
Fillers
Stearic acid
Debonding
Composite materials
Plastic deformation
Coatings
Polymers
Mechanical properties
Scanning electron microscopy
Chemical analysis
stearic acid

Keywords

  • Debonding
  • Interfacial adhesion
  • PLA/CaSO bio-composites
  • Surface modification

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Adhesion and micromechanical deformation processes in PLA/CaSO 4 composites. / Imre, Balázs; Keledi, Gergely; Renner, Károly; Móczó, J.; Murariu, Marius; Dubois, Philippe; Pukánszky, B.

In: Carbohydrate Polymers, Vol. 89, No. 3, 01.07.2012, p. 759-767.

Research output: Contribution to journalArticle

Imre, Balázs ; Keledi, Gergely ; Renner, Károly ; Móczó, J. ; Murariu, Marius ; Dubois, Philippe ; Pukánszky, B. / Adhesion and micromechanical deformation processes in PLA/CaSO 4 composites. In: Carbohydrate Polymers. 2012 ; Vol. 89, No. 3. pp. 759-767.
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