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The effects of plasticizers on the dynamic mechanical and thermal properties of poly(lactic acid)

Ljungberg, Nadia LU and Wesslén, Bengt LU (2002) In Journal of Applied Polymer Science 86(5). p.1227-1234
Abstract
Poly(lactic acid) (PLA) was blended with five plasticizers in a batchwise mixer and pressed into films. The films were analyzed by means of dynamic mechanical analysis and differential scanning calorimetry to investigate the properties of the blends. Triacetine and tributyl citrate proved to be effective as plasticizers when blended with PLA. The glass transition temperature of PLA decreased linearly as the plasticizer content was increased. Both plasticizers were miscible with PLA to an extent of similar to 25 wt %. At this point, the PLA seemed to be saturated with plasticizer and the blends tended to phase separate when more plasticizer was added. There were also signs of phase separation occurring in samples heated at 35, 50, and... (More)
Poly(lactic acid) (PLA) was blended with five plasticizers in a batchwise mixer and pressed into films. The films were analyzed by means of dynamic mechanical analysis and differential scanning calorimetry to investigate the properties of the blends. Triacetine and tributyl citrate proved to be effective as plasticizers when blended with PLA. The glass transition temperature of PLA decreased linearly as the plasticizer content was increased. Both plasticizers were miscible with PLA to an extent of similar to 25 wt %. At this point, the PLA seemed to be saturated with plasticizer and the blends tended to phase separate when more plasticizer was added. There were also signs of phase separation occurring in samples heated at 35, 50, and 80degreesC, most likely because of the material undergoing crystallization. The presence of the plasticizers induced an increased crystallinity by enhancing the molecular mobility. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
dynamic mechanical, thermal properties, poly(lactic acid), plasticizers, properties, films
in
Journal of Applied Polymer Science
volume
86
issue
5
pages
1227 - 1234
publisher
John Wiley & Sons
external identifiers
  • wos:000177612200023
  • scopus:0037206447
ISSN
1097-4628
DOI
10.1002/app.11077
language
English
LU publication?
yes
id
3669288b-92e5-4c7c-8f62-43ca5bd264bb (old id 330035)
date added to LUP
2007-11-16 09:19:19
date last changed
2017-12-10 03:54:16
@article{3669288b-92e5-4c7c-8f62-43ca5bd264bb,
  abstract     = {Poly(lactic acid) (PLA) was blended with five plasticizers in a batchwise mixer and pressed into films. The films were analyzed by means of dynamic mechanical analysis and differential scanning calorimetry to investigate the properties of the blends. Triacetine and tributyl citrate proved to be effective as plasticizers when blended with PLA. The glass transition temperature of PLA decreased linearly as the plasticizer content was increased. Both plasticizers were miscible with PLA to an extent of similar to 25 wt %. At this point, the PLA seemed to be saturated with plasticizer and the blends tended to phase separate when more plasticizer was added. There were also signs of phase separation occurring in samples heated at 35, 50, and 80degreesC, most likely because of the material undergoing crystallization. The presence of the plasticizers induced an increased crystallinity by enhancing the molecular mobility.},
  author       = {Ljungberg, Nadia and Wesslén, Bengt},
  issn         = {1097-4628},
  keyword      = {dynamic mechanical,thermal properties,poly(lactic acid),plasticizers,properties,films},
  language     = {eng},
  number       = {5},
  pages        = {1227--1234},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Applied Polymer Science},
  title        = {The effects of plasticizers on the dynamic mechanical and thermal properties of poly(lactic acid)},
  url          = {http://dx.doi.org/10.1002/app.11077},
  volume       = {86},
  year         = {2002},
}