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Influence of the Structure of Low MolecularWeight Esters on Poly(lactic acid) in the Plasticization Process - part 1 Cover

Influence of the Structure of Low MolecularWeight Esters on Poly(lactic acid) in the Plasticization Process - part 1

Fibres & Textiles in Eastern Europe
Volume 30 (2022): Issue 3 (October 2022)
By: Karolina Gzyra-Jagieła,  Konrad Sulak,  Zbigniew Draczyński,  Longina Madej Kiełbik,  Sylwia Jagodzińska and  Dominik Borkowski  
Open Access
|Sep 2022

Figures & Tables

Fig. 1

Theories of plasticization
Theories of plasticization

Fig. 2

Mechanism of plasticiser's action
Mechanism of plasticiser's action

Fig. 3

Free volume theory [22, 23]
Free volume theory [22, 23]

Fig. 4

Glass transition temperature after the second heating
Glass transition temperature after the second heating

Fig. 5

MFR values of the base and plasticised PLA
MFR values of the base and plasticised PLA

Fig. 6

Molar mass (Mw) estimated using RI detector
Molar mass (Mw) estimated using RI detector

Fig. 7

Molar mass distribution curves
Molar mass distribution curves

Fig. 8

Breaking tenacity of the base and plasticized PLA
Breaking tenacity of the base and plasticized PLA

Fig. 9

Elongation at break of the base and plasticized PLA
Elongation at break of the base and plasticized PLA

Fig. 10

Young's modulus of the base and plasticized PLA
Young's modulus of the base and plasticized PLA

Fig. 11

FTIR-ATR spectra for plasticized PLA
FTIR-ATR spectra for plasticized PLA

Fig. 12

FTIR-ATR spectra for plasticizers
FTIR-ATR spectra for plasticizers

Substances used in the PLA plasticisation process

PlasticiserProducerMw′, g/molStructure
Glycerol triacetate (TAC)ThermoFisher Scientific, Germany218
Triethyl citrate (TEC)Gentham, UK276
Acetyl triethyl citrate (Ac-TEC)TCI, Japan318
Tributyl citrate (TBC)Acros, USA360
Acetyl tributyl citrate (Ac-TBC)Merck, Germany402

Properties of 6201D PLA according to manufacturer's data

PropertyValueMethod
Specific gravity, g/cm31.24ASTM D792
Relative viscosity3.1CD Internal Viscotek Method
Melt index (210°C), g/10 min15–30ASTM D1238
Glass transition temperature, °C55–60ASTM D3417
Crystalline melt temperature, °C160–170ASTM D3418

Thermal parameters obtained during the second heating

SampleThermal analysis
Tg′, °CΔCp′, J/gKTcc′, °CΔHcc′, J/gTm′, °CΔHm′, J/g
base PLA60.00.50123.942.1165.942.2
PlasticiserPlasticised PLA
TAC38.80.51100.835.2150.0161.935.3
TEC41.70.52104.235.1153.0164.435.3
Ac-TEC37.50.50101.634.3149.8162.134.4
TBC37.80.4993.034.6148.9163.734.8
Ac-TBC40.10.5296.035.0151.0164.135.0
DOI: https://doi.org/10.2478/ftee-2022-0027 | Journal eISSN: 2300-7354 | Journal ISSN: 1230-3666
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Language: English
Page range: 93 - 101
Published on: Sep 28, 2022
Published by: Łukasiewicz Research Network, Institute of Biopolymers and Chemical Fibres
In partnership with: Paradigm Publishing Services
Publication frequency: Volume open
Keywords:
polylactic acid,
plasticisation,
GPC/SEC,
citrate,
glycerol triacetate
Related subjects:
Business and economics,
Business management,
Business informatics,
Process management,
Industrial chemistry,
Cellulose, paper and textiles,
Polymer science and technology,
Materials sciences,
Biomaterials and natural materials

© 2022 Karolina Gzyra-Jagieła, Konrad Sulak, Zbigniew Draczyński, Longina Madej Kiełbik, Sylwia Jagodzińska, Dominik Borkowski, published by Łukasiewicz Research Network, Institute of Biopolymers and Chemical Fibres
This work is licensed under the Creative Commons Attribution 3.0 License.

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