Processing of Syndiotactic Polystyrene to Microspheres for Part Manufacturing through Selective Laser Sintering

Polymers - Tập 8 Số 11 - Trang 383
Nicolas Mys1, An Verberckmoes2, Ludwig Cardon1
1Center for Polymer and Material Technologies (CPMT), Faculty of Engineering and Architecture, Ghent University, 9000 Ghent, Belgium
2Industrial Catalysis and Adsorption Technology (INCAT), Faculty of Engineering and Architecture, Ghent University, 9000 Ghent, Belgium

Tóm tắt

Syndiotactic polystyrene pellets were processed into powder form using mechanical (ball milling, rotor milling) and physicochemical (spray drying) techniques with the intention of using it as feed material for selective laser sintering. New materials are an important component in broadening the application window for selective laser sintering but must meet strict requirements to be used. Particles obtained were characterized in size and shape using SEM imaging, analyzed by software, and compared to the product obtained by conventional ball milling. Rotor milling and spray drying proved capable of making spherical powders, yet only rotor milling achieved particles with a mean diameter within the desired range of 45–97 µm. Subsequently, the obtained powders were examined for the effect each processing technique imparts on the intrinsic properties of the material. Differential scanning calorimetry analysis revealed amorphization for all methods and a reduction in crystallinity after processing, however, the reduction in crystallinity was acceptably low for the spray-dried and rotor-milled powders. Ball milling displayed an exceptional reduction in crystallinity, suggesting severe degradation. As a final test, the rotor-milled powder was subjected to single-layer test and displayed good coalescence and smooth morphology, albeit with a large amount of warpage.

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Tài liệu tham khảo

Goodridge, 2012, Laser sintering of polyamides and other polymers, Prog. Mater. Sci., 57, 229, 10.1016/j.pmatsci.2011.04.001

Wohlers associates, Wohlers Reports 2009. Available online: http://www.wohlersassociates.com/books-reports.html.

Bai, 2000, Structural changes in poly(ethylene terephthalate) induced by mechanical milling, Polymer, 41, 7147, 10.1016/S0032-3861(00)00048-3

Smith, 2000, High-energy mechanical milling of poly(methyl methacrylate), polyisoprene and poly(ethylene-alt-propylene), Polymer, 41, 6271, 10.1016/S0032-3861(99)00830-7

Jonna, 2005, Processing and properties of cryogenically milled post-consumer mixed plastic waste, Polym. Test., 24, 428, 10.1016/j.polymertesting.2005.01.009

Young, 2002, Production of spherical pellets by a hot-melt extrusion and spheronization process, Int. J. Pharm., 242, 87, 10.1016/S0378-5173(02)00152-7

Matsuyama, 2000, Formation of polypropylene particles via thermally induced phase separation, Polymer, 41, 8673, 10.1016/S0032-3861(00)00268-8

Dijkstra, 1996, Phase separation processes in polymer solutions in relation to membrane formation, J. Membr. Sci., 117, 1, 10.1016/0376-7388(96)00088-9

Song, 1995, Coarsening effects on the formation of microporous membranes produced via thermally induced phase separation of polystyrene-cyclohexanol solutions, J. Membr. Sci., 98, 209, 10.1016/0376-7388(94)00189-6

Arya, 2012, Drying induced phase separation in multicomponent polymeric coatings—Simulation study, Int. J. Sci. Technol. Res., 1, 48

Nandiyanto, 2011, Progress in developing spray-drying methods for the production of controlled morphology particles: From the nanometer to submicrometer size ranges, Adv. Powder Technol., 22, 1, 10.1016/j.apt.2010.09.011

Mys, N., Haverans, T., Verberckmoes, A., and Cardon, L. (2014, January 10–12). Production of syndiotactic polystyrene powder for part manufacturing through SLS. Proceedings of the 6th International Conference Polymers and Molds Innovations, Guimarães, Portugal.

Newman, 2001, Syndiotactic polystyrene, Encycl. Polym. Sci. Technol., 4, 418

Schellenberg, 2006, Syndiotactic polystyrene: Process and applications, Adv. Polym. Technol., 25, 141, 10.1002/adv.20069

Malanga, M., and Newman, T.H. (2002). Syndiotactic Polystyrene. Encyclopedia of Polymer Science and Technology, John Wiley & Sons, Inc.

Hansen, C.M. (2012). Hansen Solubiliy Parameters: A User’s Handbook, CRC Press.

Woo, 2001, Polymorphism, thermal behavior, and crystal stability in syndiotactic polystyrene vs. its miscible blends, Prog. Polym. Sci., 26, 945, 10.1016/S0079-6700(01)00010-7

Mukherjee, 2006, Properties of syndiotactic polystyrene composites with surface modified short Kevlar fiber, Mater. Sci. Eng. A, 441, 206, 10.1016/j.msea.2006.08.004

Ziegelmeier, S., Wöllecke, F., Tuck, C., Goodridge, R., and Hague, R. (2013, January 12–14). Characterizing the bulk & flow behaviour of LS polymer powders. Proceedings of the SFF Symposium Student Support 2013, Austin, TX, USA.

Schmid, M., Amado, F., Levy, G., and Wegener, K. (2013, January 1–5). Flowability of powders for selective laser sintering (SLS) investigated by round robin test. Proceedings of the 6th International Conference on Advanced Research in Virtual and Rapid Prototyping, Leiria, Portugal.

Barbosa-Cánovas, G.V., Ortega-Rivas, E., Juliano, P., and Yan, H. (2005). Food Powders: Physical Properties, Processing, and Functionality, Springer.

Li, 2012, Balling behavior of stainless steel and nickel powder during selective laser melting process, Int. J. Adv. Manuf. Technol., 59, 1025, 10.1007/s00170-011-3566-1

Vehring, 2007, Particle formation in spray drying, J. Aerosol Sci., 38, 728, 10.1016/j.jaerosci.2007.04.005

Vehring, 2008, Pharmaceutical particle engineering via spray drying, Pharm. Res., 25, 999, 10.1007/s11095-007-9475-1

2000, Size reduction of polystyrene in a shaker bead mill—Kinetic aspects, Chem. Eng. J., 79, 31, 10.1016/S1385-8947(00)00175-3

Scale-up from the Buchi Mini Spray Dryer B-290 to the Niro Mobil Minor. Available online: http://static1.buchi.com/sites/default/files/downloads/B-290_Scale-up_B-290_Niro_MOBILE_MINOR_en_01.pdf.

Schmid, 2015, Polymer powders for selective laser sintering (SLS), AIP Conf. Proc., 1664, 160009, 10.1063/1.4918516

Mcneill, 1990, A detailed investigation of the products of the thermal degradation of polystyrene, Polym. Degrad. Stab., 28, 131, 10.1016/0141-3910(90)90002-O

Stack, 2003, The thermal stability and thermal degradation of blends of syndiotactic polystyrene and polyphenylene ether, Polym. Degrad. Stab., 79, 29, 10.1016/S0141-3910(02)00235-5

Guyot, 1986, Recent developments in the thermal degradation of polystyrenc a review, Polym. Degrad. Stab., 15, 219, 10.1016/0141-3910(86)90052-2

Ishida, 1994, Mechanical alloying of polytetrafluoroethylene with polyethylene, J. Mater. Sci. Lett., 13, 623, 10.1007/BF00271215

Castricum, H.L., Yang, H., Bakker, H., and van Deursen, J.H. (1996, January 20–24). A study of milling of pure polymers and a structural transformation of polyethylene. Proceedings of the International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials, Rome, Italy.

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Polymers

Tập 8 Số 11

383

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