The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic

Baimark, Yodthong; Rungseesantivanon, Wuttipong; Prakymoramas, Natcha

Yodthong Baimark, Wuttipong Rungseesantivanon, Natcha Prakymoramas

The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic

Abstract:
The effect of mold conditions was investigated in terms of mold temperature (30oC and 90oC) and cooling time (30 s and 60 s) on the heat resistance of injection-molded bars for stereocomplex polylactide-b-polyethylene glycol-b-polylactide (scPLA-PEG-PLA). Comparative study was performed for poly(L-lactide) (PLLA) and PLLA-b-PEG-b-PLLA (PLLA-PEG-PLLA). scPLA-PEG-PLA was 90/10 (w/w) PLLA-PEG-PLLA/poly(D-lactide) blend. scPLA-PEG-PLA exhibited the easiest crystallization upon cooling scan as shown by differential scanning calorimetry (DSC). Higher mold-temperature and longer cooling-time induced higher degree of crystallinity as assessed by X-ray diffractometry (XRD) except for PLLA bars. The heat resistance of both PLLA-PEG-PLLA and scPLA-PEG-PLA bars was improved with increased mold-temperature and cooling-time as shown by dynamic mechanical analysis (DMA), vicat softening temperature (VST) and heat distortion-resistance tests except for PLLA bars. In conclusion, the heat resistance of injection-molded bars prepared at 90˚C mold temperature was in the order scPLA-PEG-PLA > PLLA-PEG-PLLA > PLLA. The results suggested that flexible PLLA-PEG-PLLA and scPLA-PEG-PLA with high degrees of crystallinity were successfully obtained by injection molding for use as good heat-resistant bioplastic products.

Keywords:
poly(lactic acid); polyethylene glycol; block copolymer; stereocomplex; heat resistance

Issue: 2021 Volume 58, Issue 3

Pages: 11-22

Publication date: 2021/10/5

https://doi.org/10.37358/MP.21.3.5499

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
BAIMARK, Y., RUNGSEESANTIVANON, W., PRAKYMORAMAS, N., The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic, Mater. Plast., 58(3), 2021, 11-22. https://doi.org/10.37358/MP.21.3.5499

Vancouver
Baimark Y, Rungseesantivanon W, Prakymoramas N. The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic. Mater. Plast.[internet]. 2021 Jul;58(3):11-22. Available from: https://doi.org/10.37358/MP.21.3.5499

APA 6th edition
Baimark, Y., Rungseesantivanon, W. & Prakymoramas, N. (2021). The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic. Materiale Plastice, 58(3), 11-22. https://doi.org/10.37358/MP.21.3.5499

Harvard
Baimark, Y., Rungseesantivanon, W., Prakymoramas, N. (2021). 'The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic', Materiale Plastice, 58(3), pp. 11-22. https://doi.org/10.37358/MP.21.3.5499

IEEE
Y. Baimark, W. Rungseesantivanon, N. Prakymoramas, "The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic". Materiale Plastice, vol. 58, no. 3, pp. 11-22, 2021. [online]. https://doi.org/10.37358/MP.21.3.5499

Text
Yodthong Baimark, Wuttipong Rungseesantivanon, Natcha Prakymoramas,
The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic,
Materiale Plastice,
Volume 58, Issue 3,
2021,
Pages 11-22,
ISSN 2668-8220,
https://doi.org/10.37358/MP.21.3.5499.
(https://revmaterialeplastice.ro/Articles.asp?ID=5499)
Keywords: poly(lactic acid); polyethylene glycol; block copolymer; stereocomplex; heat resistance

RIS
TY - JOUR
T1 - The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic
A1 - Baimark, Yodthong
A2 - Rungseesantivanon, Wuttipong
A3 - Prakymoramas, Natcha
JF - Materiale Plastice
JO - Mater. Plast.
PB - Materiale Plastice SRL
SN - 2668-8220
Y1 - 2021
VL - 58
IS - 3
SP - 11
EP - 22
UR - https://doi.org/10.37358/MP.21.3.5499
KW - poly(lactic acid)
KW - polyethylene glycol
KW - block copolymer
KW - stereocomplex
KW - heat resistance
ER -

BibTex
@article{MatPlast2021P11,
author = {Baimark Yodthong and Rungseesantivanon Wuttipong and Prakymoramas Natcha},
title = {The Effect of Mold Conditions on Heat Resistance of Injection-Molded Stereocomplex Polylactide-b-polyethylene Glycol-b-Polylactide Bioplastic},
journal = {Materiale Plastice},
volume = {58},
number = {3},
pages = {11-22},
year = {2021},
issn = {2668-8220},
doi = {https://doi.org/10.37358/MP.21.3.5499},
url = {https://revmaterialeplastice.ro/Articles.asp?ID=5499}
}

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