| DOI | Resolve DOI: https://doi.org/10.1016/j.polymer.2013.08.031 |
|---|
| Author | Search for: Saeidlou, S.; Search for: Huneault, M.A.; Search for: Li, H.1; Search for: Park, C.B. |
|---|
| Affiliation | - National Research Council of Canada
|
|---|
| Format | Text, Article |
|---|
| Subject | Crystalline morphologies; Crystallization behavior; Heterogeneous nucleation; High melting point; Isothermal crystallization temperature; Spherulitic morphology; Stereocomplex formation; Stereocomplexes; Blending; Complexation; Crystallization kinetics; Differential scanning calorimetry; Lactic acid; Morphology; Optical data storage; Optical microscopy; Polypropylenes; Nucleation |
|---|
| Abstract | The effect of nucleation and plasticization on the stereocomplex formation between poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) was investigated in blends where PDLA is added as a minor phase in a major phase of PLLA. The use of small amounts of PDLA is aimed at creating a high melting point stereocomplex phase that in turn can serve as nucleating agent for the major phase of PLLA. Blends containing 5% PDLA with talc or organic phosphonate as nucleants and polyethylene glycol as plasticizer were prepared via melt-blending. Their crystallization behavior was investigated through Differential Scanning Calorimetry (DSC) using various thermal histories. Two peculiar stereocomplex melting endotherms were found. The peak temperature and enthalpy of these two endotherms were correlated to prior isothermal crystallization temperature. The different endotherms were also associated with two different crystalline morphologies observed by optical microscopy and referred to as Network and Spherulitic morphologies. The influence of plasticization and of heterogeneous nucleation on these morphologies was investigated through optical microscopy and calorimetric observations. © 2013 Elsevier Ltd. All rights reserved. |
|---|
| Publication date | 2013 |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 21270697 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 7be08d47-e5cf-4b4a-8530-0c087913df9f |
|---|
| Record created | 2014-02-17 |
|---|
| Record modified | 2020-04-22 |
|---|
