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Thermal decomposition behavior of 3D printing filaments made of wood‐filled polylactic acid/starch blend
Author(s) -
Sun Yufeng,
Lee Danbee,
Wang Yapeng,
Li Suiliang,
Ying Jilai,
Liu Xinping,
Xu Guangyin,
Gwon Jaegyoung,
Wu Qinglin
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49944
Subject(s) - polylactic acid , starch , thermogravimetric analysis , thermal decomposition , materials science , decomposition , thermal stability , chemical engineering , composite material , kinetics , composite number , chemical process of decomposition , polymer chemistry , chemistry , polymer , organic chemistry , quantum mechanics , physics , engineering
Abstract Dynamic thermogravimetric analysis under nitrogen environment was used to understand the thermal decomposition process of 3D printing filaments made of wood‐filled polylactic acid (PLA)/starch blend. The characteristic temperatures and apparent activation energy (AAE) of the filaments with various starch contents were calculated with well‐known kinetic models by Friedman, Flynn–Wall–Ozawa, Coats–Redfern, and Kissinger. With the increased starch content in the filament, the onset thermal decomposition temperatures of the filaments decreased gradually from 272.4 to 155.1°C. The thermal degradation degree became smaller, and the transitional temperature interval became larger with increased starch proportion. The AAE values of the three types of filaments with different starch ratios varied between 97 and 114 kJ/mol, depending on material composition and method of calculation. The four kinetics methods provide complementary techniques for analyzing thermal stability behavior of composite materials. The improved understanding of thermal decomposition behavior of PLA‐starch‐wood composites can help develop PLA/starch‐based filaments for 3D printing.