Journal of Material Science and Technology Research

Articles

Vol. 13 (2026)

Effects of Plasticizers on the Rheological Behavior of Ethylene- Vinyl Acetate (EVA) Copolymer Using an Online Capillary Rheometer

DOI:
https://doi.org/10.31875/2410-4701.2026.13.09
Submitted
September 21, 2026
Published
2026-11-05

Abstract

The objective of this work is to find an appropriate ethylene vinyl acetate (EVA) copolymer-plasticizer blend for potential use in further extrusion-based additive manufacturing (AM) processes, such as FGF technology applications. Plasticizers, as additives, soften the materials and improve material flow in polymer processing systems. In the current work, plasticizers used were paraffin oil (PO), triethyl citrate (TEC), and di(propylene glycol) dibenzoate (DPGDB). The plasticizer concentrations used in the blends were 1, 3, 5 and 7 phr (parts per hundred resin). Increasing plasticizer content resulted in an increase in the melt flow rate (MFR) compared to the non-plasticized EVA; however, the rate of increase was strongly influenced by the type of plasticizer used. DSC results showed a reduction in melt temperature and an increase in degree of crystallinity. Viscosity measurements for blends with 5 and 7 phr were made using an online capillary rheometer. Bagley and Rabinowitsch corrections were applied to obtain the true shear viscosity. A noticeable drop in the viscosity with increasing shear rate in both plasticized and non-plasticized EVA has been detected; however, variation in viscosity was observed with changes in processing temperatures regardless of the plasticizer type and content within the measured shear-rate range. 

References

  1. Arsac A, Carrot C, Guillet J. Rheological characterization of ethylene vinyl acetate copolymers. J. Appl. Polym. Sci. 1999; 74: 2625-30. https://doi.org/10.1002/(SICI)1097-4628(19991209)74:11<2625::AID-APP9>3.0.CO;2-G
  2. Henderson AM. Ethylene-vinyl acetate (EVA) copolymers: a general review. IEEE Electr. Insul. Mag. 1993; 9: 30-8. https://doi.org/10.1109/57.249923
  3. Zhang Y, Wang Z, Li C, Chen Z, Fang P. Correlation Study between the Rheological Property and the Free Volume for Ethylene Vinyl Acetate Copolymer under Melt Extrusion. 2014. https://doi.org/10.56646/jjapcp.2.0_011201
  4. Matheus VG Zimmermann, Marcos Aurélio Colombo, Diego Pizza, and Ademir J Zattera. Influence on the cross-linking and plasticization degree of poly(ethylene-co-vinyl acetate) and evaluation of expansion capacity to the production of foams with supercritical CO2.
  5. Standring T, Blackburn S, Wilson P. Investigation into Paraffin Wax and Ethylene Vinyl Acetate Blends for Use as a Carrier Vehicle in Ceramic Injection Molding. Polymer-Plastics Technology and Engineering. 2016; 55: 802-17. https://doi.org/10.1080/03602559.2015.1132434
  6. Dazhu Chen, Weian Zhang, and Pingsheng He. Capillary Extrusion Rheology and Thermal Stability of EVA/Organomontmorillonite Nanocomposites. 2004: 271-80. https://doi.org/10.1177/096739110501300307
  7. Jang HK, Oh Y, Hwang WR. Experimental in-situ viscosity measurement of polymer melts in a film extrusion die. Chemical Engineering Science. 2025; 305: 121139. https://doi.org/10.1016/j.ces.2024.121139
  8. Wypych G. Handbook of plasticizers. 4th ed. Toronto: ChemTec Publishing; 2023.https://doi.org/10.1016/B978-1-77467-022-4.50005-1
  9. Chen Z, Fang P, Wang H, Zhang S, Wang S. Property of ethylene vinyl acetate copolymer in melting processing. J of Applied Polymer Sci. 2006; 101: 2022-6. https://doi.org/10.1002/app.23767
  10. Das A, Gilmer EL, Biria S, Bortner MJ. Importance of Polymer Rheology on Material Extrusion Additive Manufacturing: Correlating Process Physics to Print Properties. ACS Appl. Polym. Mater. 2021; 3: 1218-49. https://doi.org/10.1021/acsapm.0c01228
  11. Curmi A, Rochman A. From Theory to Practice: Development and Calibration of Micro Pellet Extruder for Additive Manufacturing. KEM. 2022; 926: 34-45. https://doi.org/10.4028/p-b22a9a
  12. Curmi A, Rochman A. Miniaturized fused granulate fabrication of polyether ether ketone (PEEK). Prog Addit Manuf. 2024; 9: 1265-75. https://doi.org/10.1007/s40964-023-00518-4
  13. Henrichs NN, Sehrt JT, Brinkmann T, Bürgel LPM, Berger DM. Influence of Flowability on the Processability of Thermoplastics in Additive Manufacturing: Comparison of Fused Layer Modeling (FLM) and Fused Granulate Fabrication (FGF ). J of Applied Polymer Sci 2026. doi: 10.1002/app.71048. https://doi.org/10.1002/app.71048
  14. Volotskoy AN, Yurkin YV, Avdonin VV. Influence Study of Plasticizer Compatibility on Strength Properties of Ethylene-Vinyl Acetate. MSF. 2018; 935: 79-83. https://doi.org/10.4028/www.scientific.net/MSF.935.79
  15. Lu H, Liu M, Ruan C, Su L, Yan H, Wang H. Practicality of bioderived coconut oil as a plasticizer for ethylene propylene diene monomer. Industrial Crops and Products. 2025; 224: 120342. https://doi.org/10.1016/j.indcrop.2024.120342
  16. Luger H-J, Miethlinger J. Development of an online rheometer for simultaneous measurement of shear and extensional viscosity during the polymer extrusion process. Polymer Testing. 2019; 77: 105914. https://doi.org/10.1016/j.polymertesting.2019.105914
  17. Wilczyński KJ, Buziak K, Lewandowski A, Wilczyński K. Rheology for Wood Plastic Composite Extrusion-Part 1: Laboratory vs. On-Line Rheometry. Polymers (Basel) 2025. https://doi.org/10.3390/polym17202782
  18. McAfee M, McNally G. Real-time measurement of melt viscosity in single-screw extrusion. Transactions of the Institute of Measurement and Control. 2006; 28: 481-97. https://doi.org/10.1177/0142331206069478
  19. Stan F, Stanciu NV, Fetecau C. Melt rheological properties of ethylene-vinyl acetate/multi-walled carbon nanotube composites. Composites Part B: Engineering. 2017; 110: 20-31. https://doi.org/10.1016/j.compositesb.2016.10.071
  20. Ferreira IP, Da Sirqueira AS, Santos TAd, Naccache MF, Soares BG. Rheological studies of SBS/EVA blends modified with bio-based cashew nut shell liquid. Journal of Elastomers & Plastics. 2021; 53: 825-40. https://doi.org/10.1177/0095244321990407
  21. Rides M, Kelly AL, Allen CR. An investigation of high rate capillary extrusion rheometry of thermoplastics. Polymer Testing. 2011; 30: 916-24. https://doi.org/10.1016/j.polymertesting.2011.08.011
  22. Agroui K, Collins G, Farenc J. Measurement of glass transition temperature of crosslinked EVA encapsulant by thermal analysis for photovoltaic application. Renewable Energy. 2012; 43: 218-23. https://doi.org/10.1016/j.renene.2011.11.015

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