Back to Search Start Over

Particle percolation in a poly(lactic acid)/calcium carbonate nanocomposite with a small amount of a secondary phase and its influence on the mechanical properties.

Particle percolation in a poly(lactic acid)/calcium carbonate nanocomposite with a small amount of a secondary phase and its influence on the mechanical properties.

Authors :
Lee, Jung Myung
Hong, Joung Sook
Ahn, Kyung Hyun
Source :
Polymer Composites. Oct2019, Vol. 40 Issue 10, p4023-4032. 10p.
Publication Year :
2019

Abstract

In this study, poly(lactic acid) (PLA) is blended with natural rubber (NR) to improve a brittleness of PLA. Surface‐modified inorganic particles of calcium carbonate are incorporated to this polymer blend not only to mitigate the strength loss but also to induce toughening of the PLA. Specifically, in order to toughen the PLA, the influence of NR as a second phase on the particle dispersion characteristics is examined while varying the concentration of the particles or the second phase and undertaking rheological measurements and morphological observations. With the surface‐modified particles, the secondary phase was found to induce the aggregation of particles along the interface as opposed to creating a homogeneous dispersion of particles. In addition, it enhanced the particle percolation throughout the blend and improved the brittleness of the PLA. With regard to elongation at break of the PLA/particle, it was increased from 12 to 86% by the addition of NR (19 vol%). On the other hand, for a composite with uncoated particles, the second phase of NR did not induce particle aggregation. Elongation at break of this composite decreased as the particle concentration increased. POLYM. COMPOS., 40:4023–4032, 2019. © 2019 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02728397
Volume :
40
Issue :
10
Database :
Academic Search Index
Journal :
Polymer Composites
Publication Type :
Academic Journal
Accession number :
138939738
Full Text :
https://doi.org/10.1002/pc.25263