DOI QR코드

DOI QR Code

Influence of Sample Preparation on Thermogravimetric Analysis of Poly(Ethylene-co-Vinyl Acetate)

  • Received : 2016.08.10
  • Accepted : 2016.09.02
  • Published : 2016.09.30

Abstract

Experimental error sources for thermogravimetric analysis (TGA) of poly(ethylene-co-vinyl acetate) (EVA) were investigated and sample preparation method to reduce the experimental error was suggested. Maximum dissociation temperatures of EVA for the first and second dissociation reactions ($T_{m1}$ and $T_{m2}$, respectively) were measured. By decreasing the weight of raw EVA, the $T_{m1}$ increased but the the $T_{m2}$ decreased. When weight of the raw EVA was over 10 mg, the TGA curve showed abnormal behaviors. The abnormal TG behaviors were explained by gathering and instantaneous evaporation of acetic acid formed by deacetylation of the VA unit. When TGA analysis of EVA was performed using untreated (raw) EVA, the experimental errors were about 1%. In order to eliminate the abnormal TG behaviors and to reduce the experimental errors, EVA film made by solvent casting was used. For the treated EVA (EVA film), the abnormal TG behaviors did not appear, the $T_{m1}$ decreased by about $2^{\circ}C$ but the $T_{m2}$ increased by about $6^{\circ}C$, and the experimental errors were reduced by 0.5%.

References

  1. G. Meszlenyi and G. Kortvelyessy, "Direct Determination of Vinyl Acetate Content of Ethylene Vinyl Acetate Copolymers in Thick Films by Infrared Spectroscopy", Polym. Test., 18, 551 (1999). https://doi.org/10.1016/S0142-9418(98)00053-1
  2. I. Poljansek, E. Fadjan, K. Burja, and D. Kukanja, "Emulsion Copolymerization of Vinyl Acetate-ethylene in High Pressure Reactor-characterization by Inline FTIR Spectroscopy", Prog. Org. Coat., 76, 1798 (2013). https://doi.org/10.1016/j.porgcoat.2013.05.019
  3. S.-J. Park, J.-H. Kim, H.-J. Joo, and F.-L. Jin, "Effect of Silicone Rubber Content on Thermal Stabilities of Epdm/silicone Blends" Elast. Compos., 40, 266 (2005).
  4. C. Hoffendahl, G. Fontaine, S. Duquesne, F. Taschner, M. Mezger, and S. Bourbigot, "The Combination of Aluminum Trihydroxide (ATH) and Melamineborate (MB) as Fire Retardant Additives for Elastomeric Ethylene Vinylacetate (EVA)", Polym. Degrad. Stab., 115, 77 (2015). https://doi.org/10.1016/j.polymdegradstab.2015.03.001
  5. J. W. Gilman, "Flammability and Thermal Stability Studies of Polymer Layered-silicate Clay/nanocomposites", Appl. Clay Sci., 15, 31 (1999). https://doi.org/10.1016/S0169-1317(99)00019-8
  6. S.-J. Park, M.-S. Cho, and J.-R. Lee, "Influence of Oxidation Inhibitor on Carbon-carbon Composites: 3. Effect of Molybdenum Disilicide on Thermal Stability of the Composites", Polymer(Korea), 23, 305 (1999).
  7. K.-D. Lee, T.-U. Ryu, and S.-W. Park, "Characterization on Co-combustion of Coal and Paper Mill Sludge", J. Environ. Sci. Int., 22, 331 (2013). https://doi.org/10.5322/JESI.2013.22.3.331
  8. S.-S. Choi, J.-C. Kim, and C.-S. Woo, "Accelerated Thermal Aging Behaviors of EPDM and NBR Vulcanizates", Bull. Korean Chem. Soc., 27, 305 (2006). https://doi.org/10.5012/bkcs.2006.27.2.305
  9. S. Isarankura Na Ayutthaya and J. Wootthikanokkhan, "Investigation of the Photodegradation Behaviors of an Ethylene/ vinyl Acetate Copolymer Solar Cell Encapsulant and Effects of Antioxidants on the Photostability of the Material", J. Appl. Polym. Sci., 107, 3853 (2008). https://doi.org/10.1002/app.27428
  10. R. Mehrabian, R. Scharler, and I. Obernberger, "Effects of Pyrolysis Conditions on the Heating Rate in Biomass Particles and Applicability of TGA Kinetic Parameters in Particle Thermal Conversion Modelling", Fuel, 93, 567 (2012). https://doi.org/10.1016/j.fuel.2011.09.054
  11. K.-S. Jun and P.-S. Soon, "Non Destructive Technique for Steel Corrosion Detection Using Heat Induction and IR Thermography", J. Kor. Inst. Struct. Maint. Inspec., 16, 40 (2012).
  12. J.-Y. Kim, C.-J. Choi, K.-S. Song, and S.-H. Choi, "Evaluation on the Materials Internal Defect by Using IR Camera", Kor. Soc. Prec. Eng., 2006, 355 (2006).
  13. D.-S. Yoon, J.-K. Choi, and B.-W. Jo, "Physical Properties and Flame Retardency of Polyhydroxyamides (PHAs) Having Pendant Groups in the Main Chain", Polymer(Korea), 30, 478 (2006).
  14. M. Patel, S. Pitts, P. Beavis, M. Robinson, P. Morrell, N. Khan, I. Khan, N. Pockett, S. Letant, G. Von White II, and A. Labouriau, "Thermal Stability of poly(ethylene-co-vinyl acetate) Based Materials", Polym Test, 32, 785 (2013). https://doi.org/10.1016/j.polymertesting.2013.03.014
  15. B. Rimez, H. Rahier, G. Van Assche, T. Artoos, M. Biesemans, and B. Van Mele, "The Thermal Degradation of poly(vinyl acetate) and poly(ethylene-co-vinyl acetate), Part I: Experimental Study of the Degradation Mechanism", Polym. Degrad. Stab., 93, 800 (2008). https://doi.org/10.1016/j.polymdegradstab.2008.01.010
  16. B. Rimez, H. Rahier, G. Van Assche, T. Artoos, and B. Van Mele, "The Thermal Degradation of poly(vinyl acetate) and poly(ethylene-co-vinyl acetate), Part II: Modelling the Degradation Kinetics, Polym. Degrad. Stab., 93, 1222 (2008). https://doi.org/10.1016/j.polymdegradstab.2008.01.021
  17. J.-H. Lee, J.-H. Kim, C.-H. Yi, Y.-G. Kim, C.-K. Lim, C.-K. Lee, and Y.-S. Kwon, "A Study on the Development of an Automatic Multi-nozzle Injection Molding Machine", J. Korean Soc. Ind. Appl., 10, 123 (2007).
  18. K.-H. Park, D.-H. Kim, J.-K. Jung, S.-G. Kim, D.-S. Bang, M.-H. Oh, and B.-S. Kim, "Effect of Compatibilizers on the Mechanical Properties of Waste Polypropylene/waste Ground Rubber Tire Composites", J. Kor. Inst. Res. Rec., 23, 70 (2014).
  19. A. N. Garcia and R. Font, "Thermogravimetric Kinetic Model of the Pyrolysis and Combustion of an Ethylene-vinyl Acetate Copolymer Refuse", Fuel, 83, 1165 (2004). https://doi.org/10.1016/j.fuel.2003.10.029