Experimental investigation of mechanical properties of UV-Curable 3D printing materials

Abstract More recently, three dimensional printing (3D Printing), also known as an additive manufacturing (AM), has been highlighted since it shows a great promise to realize almost any three dimensional parts or structures with computer aided design (CAD). Several different processes are available for 3D printing, which includes fused deposition modeling, selective laser sintering, stereolithography, photopolymerization, and etc. In particular, considerable attention is paid to the 3D printing technique with photopolymerization due to their high resolutions. Unfortunately, the 3D printed products with photopolymerization however possess poor mechanical properties. Understanding of this should be necessary for the advantages of the 3D printing to be fully realized. Here, this study experimentally investigates the mechanical properties of the 3D printed photopolymer through thermomechanical analysis and tensile testing. In this study, it is found that the printed specimens are not fully cured after the 3D printing with photopolymerization. DiBenedetto equation is employed to better understand the relationship between the curing status and tensile properties. In addition to the poor mechanical properties, anisotropic and size dependent tensile properties of the 3D printed photopolymers are also observed. Electron beam treatment is used to ensure the cure of the 3D printed photopolymer and the corresponding tensile properties are characterized and investigated.

[1]  Mark S. Mirotznik,et al.  Microstructural design and additive manufacturing and characterization of 3D orthogonal short carbon fiber/acrylonitrile-butadiene-styrene preform and composite , 2016 .

[2]  R. Pandey,et al.  Photopolymers in 3D printing applications , 2014 .

[3]  R. Gibson.  Principles of Composite Material Mechanics , 1994 .

[4]  Christopher B. Williams,et al.  Additive manufacturing (AM) and nanotechnology: promises and challenges , 2013 .

[5]  S. Lapin.  Comparison of UV and EB Technology for Printing and Packaging Applications , 2008 .

[6]  Les A. Piegl,et al.  Ten challenges in 3D printing , 2015, Engineering with Computers.

[7]  Xiaohong Qin,et al.  Additive manufacturing of multi-directional preforms for composites: opportunities and challenges , 2015 .

[8]  Joshua M. Pearce,et al.  Mechanical properties of components fabricated with open-source 3-D printers under realistic environmental conditions , 2014 .

[9]  Hod Lipson,et al.  Fabricated: The New World of 3D Printing , 2013 .

[10]  J L Ferracane,et al.  Post-cure heat treatments for composites: properties and fractography. , 1992, Dental materials : official publication of the Academy of Dental Materials.

[11]  Caroline Sunyong Lee,et al.  Measurement of anisotropic compressive strength of rapid prototyping parts , 2007 .

[12]  S. H. Goodman.  Handbook of thermoset plastics , 1986 .

[13]  Jeffrey W Stansbury,et al.  3D printing with polymers: Challenges among expanding options and opportunities. , 2016, Dental materials : official publication of the Academy of Dental Materials.

[14]  P. Wright,et al.  Anisotropic material properties of fused deposition modeling ABS , 2002 .

[15]  Edward H. Smith,et al.  Mechanical engineer's reference book , 1994 .

[16]  J. Nam,et al.  Equivalent processing time analysis of glass transition development in epoxy/carbon fiber composite systems , 2002 .

[17]  Kristina Shea,et al.  Mechanical properties of parts fabricated with inkjet 3D printing through efficient experimental design , 2015 .

[18]  Lawrence E. Nielsen,et al.  Cross-Linking–Effect on Physical Properties of Polymers , 1969 .

[19]  R. Carbas,et al.  Effect of post-cure on the glass transition temperature and mechanical properties of epoxy adhesives , 2013 .

[20]  A. Dibenedetto,et al.  Prediction of the glass transition temperature of polymers: A model based on the principle of corresponding states , 1987 .

[21]  Ye Chan Kim,et al.  UV-curing kinetics and performance development of in situ curable 3D printing materials , 2017 .

[22]  Christian Vogt,et al.  Rapid prototyping of small size objects , 2000 .