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首页> 外文期刊>Journal of Applied Polymer Science >Structural changes during 3D printing of bioderived and synthetic thermoplastic materials
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Structural changes during 3D printing of bioderived and synthetic thermoplastic materials

机译：生物化和合成热塑性材料的3D印刷过程中的结构变化

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摘要

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. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019.
机译：如今，三维（3D）印刷工艺在转换传统艺术，工程和制造过程中引领电荷。在本研究中，由合成聚（丙烯腈 - 叔丁二烯 - 共苯乙烯）热塑性塑料以及聚（乳酸）和聚（乳酸）/聚羟基甲酸盐和竹子（Bambusa）组成的市售长丝的结构和热行为（Bambusa SP。）通过差分扫描量热法和红外光谱评估木粉复合生物塑料，旨在了解在其3D印刷期间分子水平发生的修饰。已经确定，当在提交3D印刷挤出时，生物塑料材料经历与术后增加和结晶度降低的分子重构，而合成热塑性塑料由于其丁二烯组分而经历交联。所有研究的材料都具有良好的水稳定性（水吸收值0.8％和24％之间），吸水性遵循伪Fickian机制。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019年。

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