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Structural changes during 3D printing of bioderived and synthetic thermoplastic materials
Author(s) -
Pop Mihai Alin,
Croitoru Cătălin,
Bedő Tibor,
Geamăn Virgil,
Radomir Irinel,
Cos,nit,ă Mihaela,
Zaharia Sebastian Marian,
Chicos, Lucia Antoaneta,
Milos,an Ioan
Publication year - 2019
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.47382
Subject(s) - materials science , crystallinity , thermoplastic , differential scanning calorimetry , absorption of water , thermal stability , lactic acid , chemical engineering , bioplastic , extrusion , polymer chemistry , composite material , engineering , ecology , physics , genetics , biology , bacteria , thermodynamics
ABSTRACT Three‐dimensional (3D) printing processes are nowadays leading the charge in transforming traditional art, engineering, and manufacturing processes. In this study, the structural and thermal behavior of commercially available filaments composed of synthetic poly(acrylonitrile‐ co ‐butadiene‐ co ‐styrene) thermoplastic as well as poly(lactic acid) and poly(lactic acid)/polyhydroxyalcanoate reinforced with bamboo ( Bambusa sp .) wood flour composite biothermoplastics were assessed by differential scanning calorimetry and infrared spectroscopy, aiming to understand the modifications that occur at the molecular level during their 3D printing. It has been determined that the biothermoplastic materials undergo both molecular reorientations related to tacticity increase and crystallinity decrease when submitted to 3D printing extrusion, while the synthetic thermoplastic undergoes crosslinking due to its butadiene component. All of the studied materials present good water stability (with water uptake values between 0.8% and 24%), and the water absorption follows a pseudo‐Fickian mechanism. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 .