Crystallization kinetics of polyamide 2200 in the modelling of additive manufacturing processes by FE analyses

• Autorzy: Bajerski Paweł , Pęcherski Ryszard Bolesław , Chudy Damian , Jarecki Leszek

Identyfikatory

DOI

10.24423/EngTrans.1013.20190729

• Języki publikacji: EN

Abstrakty

EN

The thermoplastic polymers present amorphous or semi-crystalline structures which are very important factors in describing volumetric shrinkage. The thermoplastic materials are commonly used for production of daily life products, industrial or as the prototypes. Different techniques of manufacturing polymer structures are considered like: injection molding, extrusion, milling, additive manufacturing (AM). AM is a very fast developing field in the manufacturing and research. Unfortunately, components or prototypes made using the thermoplastic semi-crystalline materials in 3D techniques have quite low mechanical strength compared to the parts made by injection molding processes. It is caused by porosity obtained during the processing, as well as by fraction of crystallinity in the volume of the components. Additionally, the volumetric shrinkage is hard to predict without knowledge of its origin. Therefore, it is necessary to consider crystallization kinetics and the melting of the analysed materials. The investigations presented in this work concern the crystallization and melting model to be implemented in the finite element (FE) analyses. With use of the model, one can predict development of the structure during the real processes and, in the future, to control the warpage of the manufactured components.

Słowa kluczowe

EN

additive manufacturing; Avrami model; crystallization; Differential Scanning Calorimetry; DSC; glass transition temperature; Hoffman-Lauritzen theory; melting; van Krevelen empirical model

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2019
• Tom: Vol. 67, iss. 3
• Strony: 301--309
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Bajerski Paweł

• ABB Sp. z o.o. Corporate Research Center Starowiślna 13A, 31-038 Cracow, Poland

autor

Pęcherski Ryszard Bolesław

• AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Al. Mickiewcza 30, 30-059 Cracow, Poland

autor

Chudy Damian

• AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Al. Mickiewcza 30, 30-059 Cracow, Poland

autor

Jarecki Leszek

• Institute of Fundamental Technological Research Polish Academy of Sciences

Bibliografia

• 1. Michler G.H., Balta-Calleja F.J., Mechanical properties of polymers based on nanostructure and morphology, CRC Press, 2005.
• 2. Schultz J.M., Polymer crystallization. The development of crystalline order in thermoplastic polymers, Oxford University Press, 2001.
• 3. Amado A., Wegener K., Schmid M., Levy G., Characterization and modelling of nonisothermal crystallization of Polyamide 12 and co-Polypropylene during the SLS process, 5th International Polymers & Moulds Innovations Conference, Ghent, 2012.
• 4. Jarecki L., Pęcherski R.B., Kinetics of oriented crystallization of polymers in the linear stress-orientation range in the series expansion approach, Express Polymer Letters, 12(4): 330–348, 2018.
• 5. Hoffman J.D., Davis G.T., Lauritzen J.I., Jr., The rate of crystallization of linear polymers with chain folding, Treatise on Solid State Chemistry, vol. 3 (N.B. Hannay, ed.), Plenum, New York, 1976.
• 6. Greco A., Maffezzoli A., Statistical and kinetic approaches for linear low-density polyethylene melting modeling, Applied Polymer Science, 89: 289–295, 2003.
• 7. van Krevelen D.W., Te Nijenhius K., Properties of polymers, Elsevier, 4th completely revised edition, 2009.
• 8. Brenken B., Barocio E., Favaloro A.J., Pipes R.B., Simulation of semi-crystalline composites in the extrusion deposition additive manufacturing process, Science in the Age of Experience, pp. 90–102, Chicago, IL, 2017.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).