Sharma, Reeha and Lata, Roselyn A. and Patel, Tejesvi and Bikiaris, Dimitrios N. and Kuboyama, Keiichi and Rohindra, David (2025) Estimating the activation energy of crystallization in blends of poly L-lactic acid and poly(propylene 2,5-furan dicarboxylate) during isothermal melt crystallization using temperature dependent infrared spectroscopy. Journal of Applied Polymer Science, 142 (1). NA. ISSN 0021-8995
Full text not available from this repository.Abstract
Blends of Poly-L-Lactic Acid (PLLA) and Poly(propylene-2,5-furan dicarboxylate) (PPF) which have similar thermal properties were prepared by melt-mixing. The crystalline/crystalline blends were investigated by Differential Scanning Calorimetry, Polarized Optical Microscopy, Wide Angle X-Ray Diffraction and temperature dependent Fourier Transform Infrared Spectroscopy. The presence of two glass transition temperatures (Tg) in the blends confirmed immiscibility. The X-Ray diffraction pattern ruled out the formation of new crystal morphology. PLLA formed large negative birefringent spherulites while PPF spherulites were extremely small. The isothermal crystallization kinetics of the two polyesters in the blends were investigated by monitoring the absorbance intensities of the crystalline infrared bands at 711 cm−1 and 990 cm−1 for PLLA and PPF respectively. Both neat polyesters exhibited a slower crystallization rate, but their behavior varied in the blends. The activation energy (Ea) of crystallization of PLLA and PPF calculated using the Arrhenius equation were −96.58 and −148.59 kJmol−1 respectively. The Ea of both polyesters increased as the content of PLLA in the blends increased. Temperature dependent FTIR was successful in determining the crystallization parameters in crystalline/crystalline blends of PLLA and PPF.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QD Chemistry |
| Divisions: | School of Agriculture, Geography, Environment, Ocean and Natural Sciences (SAGEONS) |
| Depositing User: | Ms Shalni Sanjana |
| Date Deposited: | 01 Apr 2025 00:06 |
| Last Modified: | 01 Apr 2025 00:06 |
| URI: | https://repository.usp.ac.fj/id/eprint/14890 |
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