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Synergistic effect of plasticizer and nucleating agent on crystallization behavior of polylactide during fused filament fabrication

文献类型：期刊论文

作者Gao, Xia2; Qi, Shunxin1,3; Yang, Bo1,3; Su, Yunlan1; Li, Jing2,3; Wang, Dujin1,3
刊名POLYMER
出版日期2021-02-12
卷号215页码:10
ISSN号0032-3861
关键词Fused filament fabrication Polylactide Shear-induced crystallization
DOI10.1016/j.polymer.2021.123426
通讯作者Su, Yunlan(ylsu@iccas.ac.cn) ; Li, Jing(jingli@cigit.ac.cn)
英文摘要Polylactide (PLA) materials manufactured by fused filament fabrication (FFF) technique are usually in amorphous form and thereby exhibit poor mechanical properties and thermal resistance. Overcoming this issue requires a good knowledge of the crystallization behavior of PLA materials during the FFF process. In this work, a plasticizer (polyethylene glycol, PEG) and a nucleating agent (tetramethylene-dicarboxylic dibenzoyl-hydrazide, TMC-306), were added in PLA matrix, separately and synergistically, to tailor crystallization behavior of FFF-printed PLA parts. At a bed temperature of 60 degrees C, PEG played a stronger effect on crystallization behavior than the nucleating agent TMC and even the combination of TMC and PEG. This resulted in an increase of the crystallinity from 8% for both neat PLA and PLA/TMC samples to 18% for the samples containing PEG. With the increase of the bed temperature to 90 degrees C, TMC and PEG separately or synergistically had prominent effects on enhancing the crystallization ability of PLA during the FFF process, leading to the highly crystalline PLA parts with the crystallinities in the range of 30-40%. By means of wide angle X-ray diffraction and scanning electron microscopy measurements, shear-induced crystal structures were indentified at the filament surface as well as the weld interface. Nevertheless, the shear-induced effect had negligible influence on the final crystallinity of PLA parts. Instead, PLA parts with a high crystallinity can be attained, only when the material characteristics and the printing conditions are in favor of cold crystallization of PLA. The unique crystallization behavior of FFF-printed PLA materials offers guidelines for the fabrication of products with controlled crystallinity and hierarchical structures for specific applications.
资助项目National Key Research and Development Program of China[2016YFB1100800] ; National Natural Science Foundation of China[51603205] ; Innovation and Cultivation Project of ICCAS
WOS研究方向Polymer Science
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000618215400005
源URL[http://119.78.100.138/handle/2HOD01W0/13038]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Su, Yunlan; Li, Jing
作者单位1.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing Engn Res Ctr Applicat Technol 3D Printi, Chongqing 400714, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Xia,Qi, Shunxin,Yang, Bo,et al. Synergistic effect of plasticizer and nucleating agent on crystallization behavior of polylactide during fused filament fabrication[J]. POLYMER,2021,215:10.
APA Gao, Xia,Qi, Shunxin,Yang, Bo,Su, Yunlan,Li, Jing,&Wang, Dujin.(2021).Synergistic effect of plasticizer and nucleating agent on crystallization behavior of polylactide during fused filament fabrication.POLYMER,215,10.
MLA Gao, Xia,et al."Synergistic effect of plasticizer and nucleating agent on crystallization behavior of polylactide during fused filament fabrication".POLYMER 215(2021):10.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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