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Correlation between welding behavior and mechanical anisotropy of long chain polyamide 12 manufactured with fused filament fabrication

文献类型：期刊论文

作者Qi, Shunxin2,4; Gao, Xia3; Su, Yunlan2,4; Dong, Xia2,4; Cavallo, Dario1; Wang, Dujin2,4
刊名POLYMER
出版日期2021-01-20
卷号213页码:8
关键词Long chain polyamide 12 Crystallization behavior Weld interface Tensile property Mechanical anisotropy
ISSN号0032-3861
DOI10.1016/j.polymer.2020.123318
通讯作者Gao, Xia(gaoxia@cigit.ac.cn) ; Su, Yunlan(ylsu@iccas.ac.cn)
英文摘要Fused filament fabricated (FFF) parts generally show anisotropic mechanical properties. Moreover, the anisotropy in FFF-printed parts varies with polymeric materials, depending on their characteristic relaxation and/or crystallization behavior. To acquire in-depth understanding of the mechanical anisotropy induced by the FFF technique, long chain polyamide 12 (PA12) was chosen for an investigation of the effect of printing temperatures on the microstructures and the mechanical properties of FFF-printed parts. It is found that increasing platform temperature gives rise to an increase in crystallinity and lamellae thickness, slightly improving the tensile strength of the PA12 parts with the deposited strands parallel to the loading direction (i.e. raster angle = 0 degrees). Increasing nozzle temperature promotes large neck length and prolongs the weld time that permits molecular diffusion and entanglements at the weld zone. This significantly enhances the inter-filament bond quality revealed by the tensile strength of 90 degrees specimens. Ultimately, the mechanical anisotropy of PA12 parts drops from 40% to 10%, as the nozzle temperature changes from 190 degrees C to 250 degrees C. Moreover, a power-law dependence of the mechanical anisotropy on the weld time is observed in PA12 parts. This suggests that the mechanical anisotropy of FFF-printed PA12 parts is determined by molecular diffusion at the weld zone, rather than by crystallization behavior.
资助项目Innovation and Cultivation Project, ICCAS ; National Key Research and Development Program of China[2017YFB307600] ; National Natural Science Foundation of China[51603205]
WOS研究方向Polymer Science
语种英语
WOS记录号WOS:000608414700003
出版者ELSEVIER SCI LTD
源URL[http://119.78.100.138/handle/2HOD01W0/12754]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Gao, Xia; Su, Yunlan
作者单位1.Univ Genoa, Dept Chem & Ind Chem, Via Dodecaneso 31, I-16146 Genoa, Italy
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Chongqing Engn Res Ctr Applicat Technol 3D Printi, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
4.Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci,Inst Chem, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Qi, Shunxin,Gao, Xia,Su, Yunlan,et al. Correlation between welding behavior and mechanical anisotropy of long chain polyamide 12 manufactured with fused filament fabrication[J]. POLYMER,2021,213:8.
APA Qi, Shunxin,Gao, Xia,Su, Yunlan,Dong, Xia,Cavallo, Dario,&Wang, Dujin.(2021).Correlation between welding behavior and mechanical anisotropy of long chain polyamide 12 manufactured with fused filament fabrication.POLYMER,213,8.
MLA Qi, Shunxin,et al."Correlation between welding behavior and mechanical anisotropy of long chain polyamide 12 manufactured with fused filament fabrication".POLYMER 213(2021):8.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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