Published

2022-07-05

DETERMINATION OF THE VISCOSITY TEMPERATURE COEFFICIENT (β) AND PSEUDOPLASTIC INDEX (n) OF POLY(LACTID ACID) (PLA)

DETERMINACIÓN DEL COEFICIENTE DE TEMPERATURA DE VISCOSIDAD (β) Y EL ÍNDICE DE PSEUDOPLASTICIDAD (n) DEL POLI(ÁCIDO LÁCTICO) (PLA)

Downloads

Authors

  • Carlos B. B. Luna Federal University of Campina Grande, Academic Unit of Materials Engineering, Polymer Processing Laboratory - PPL, Av. Aprígio Veloso, 882 - Bodocongó, 58429-900, Campina Grande - Paraíba. https://orcid.org/0000-0002-2441-7439
  • Eduardo S. B. Ferreira Federal University of Campina Grande, Academic Unit of Materials Engineering, Polymer Processing Laboratory - PPL, Av. Aprígio Veloso, 882 - Bodocongó, 58429-900, Campina Grande - Paraíba. https://orcid.org/0000-0002-2670-2794
  • Fernanda M. Sousa Federal University of Campina Grande, Academic Unit of Materials Engineering, Polymer Processing Laboratory - PPL, Av. Aprígio Veloso, 882 - Bodocongó, 58429-900, Campina Grande - Paraíba. https://orcid.org/0000-0002-0208-2666
  • Emanuel P. Nascimento Federal University of Campina Grande, Academic Unit of Materials Engineering, Polymer Processing Laboratory - PPL, Av. Aprígio Veloso, 882 - Bodocongó, 58429-900, Campina Grande - Paraíba. https://orcid.org/0000-0003-1294-8897
  • Edcleide M. Araújo Federal University of Campina Grande, Academic Unit of Materials Engineering, Polymer Processing Laboratory - PPL, Av. Aprígio Veloso, 882 - Bodocongó, 58429-900, Campina Grande - Paraíba.
  • Dayanne D. Souza Department of Mechanical Engineering, Federal University of Pernambuco, DEMEC/CCT/UFPE, Recife - Pernambuco.
  • Elieber B. Bezerra Department of Materials Engineering, Federal University of Paraíba, Cidade Universitária, 58051-900, João Pessoa, PB. https://orcid.org/0000-0003-1637-7761
  • Renate M. R. Wellen Department of Materials Engineering, Federal University of Paraíba, Cidade Universitária, 58051-900, João Pessoa, PB.

Poly(lactic acid) (PLA) is one of the most important ecological thermoplastics due to its good mechanical properties. In light of this, investigations related to the effects of PLA processing parameters are important as they affect the final product performance. This work aimed to determine the viscosity-temperature coefficient (β) and pseudoplastic index (n) of PLA and estimate its degradation rate during processing using an internal mixer. The viscosity coefficient was determined applying different processing temperatures at the same rotors rotation rate, which allowed estimating β = 0.048 ◦C−1. PLA’s pseudoplastic index (n) under the tested conditions suggested a value of approximately 0.71. PLA’s degradation rate was around 4% under rotor rate of 120 rpm and temperature of 190 ◦C.

El poli(ácido láctico) (PLA) es uno de los termoplásticos ecológicos más importantes en la actualidad, debido a sus buenas propiedades mecánicas. En vista de esto, las investigaciones sobre los efectos de los parámetros de procesamiento de PLA son importantes, ya que afectan el rendimiento final del producto. Este trabajo tuvo como objetivo determinar el coeficiente de sensibilidad de la viscosidad con la temperatura (β) y el índice de plasticidad (n) del PLA, así como estimar su tasa de degradación durante el procesamiento en un mezclador interno. Para el coeficiente de viscosidad del PLA se adoptaron diferentes temperaturas de procesamiento y la misma velocidad de rotación de los rotores, lo que permitió estimar β = 0,048 °C-1. El índice de plasticidad (n) del PLA en las condiciones ensayadas sugirió un valor de aproximadamente 0,71. Se encontró que la tasa de degradación que sufrió el PLA fue de alrededor del 4%, utilizando una rotación del rotor de 120 rpm y una temperatura de 190 °C.

Downloads

Download data is not yet available.

References

M. Shamsuyeva and H. J. Endres, Composites Part C: Open Access, 6(10), 100168 (2021). https://doi.org/10.1016/j.jcomc.2021.100168

C. B. B. Luna, E. S. B. Ferreira, L. J. M. D. Silva, W. A. Silva, E. M. Araújo and J. B. C. A, Materials Research Express, 6(12), 125319 (2019). https://doi.org/10.1088/2053-1591/ab56b2

M. G. Davidson, R. A. Furlong and M. C. Mcmanus. Journal of Cleaner Production, 293(4), 126163 (2021). https://doi.org/10.1016/j.jclepro.2021.126163

Z. O. Schyns and M. P. Shaver, Macromolecular Rapid Communications, 42(3), 2000415 (2021). https://doi.org/10.1002/marc.202000415

C. B. B. Luna, D. D. Siqueira, E. S. B. Ferreira, W. A. Silva, J. A. S. Nogueira and E. M. Arújo, Sustainability, 12(13), 5272 (2020). https://doi.org/10.3390/su12135272

E. S. B. Ferreira, C. B. B. Luna, D. D. Siqueira, E. A. S. Filho, E. M. Araújo and R. M. R. Wellen, Sustainability, 13(21), 12157 (2021). https://doi.org/10.3390/su132112157

A. Dey, P. Jali, A. K. Behera, A. B. Das and C. Pradhan, Polymer Composites, 41(4), 1428-1434 (2020). https://doi.org/10.1002/pc.25466

S. G. Sankaravel, R. B. Syed and V. Manivachakan, Polymer Composites, 43(1), 173-186 (2022). https://doi.org/10.1002/pc.26365

J. Santos, P. K. Penumakala and R. B. Adusumalli, Polymer Composites, 42(7), 3231-3242 (2021). https://doi.org/10.1002/pc.26053

V. A. Yiga, M. Lubwama, S. Pagel, J. Benz, P. W. Olupot and C. Bonten, Polymer Composites, 42(1), 15-44 (2021). https://doi.org/10.1002/pc.25835

W. A. Silva, C. B. B. Luna, J. B. C. A. Melo, E. M. Araújo, E. A. S. Filho and R. N. C. Journal of Polymers and the Environment, 29, 2932–2951 (2021). https://doi.org/10.1007/s10924-021-02076-8

J. O. Akindoyo, M. D. H. Beg, S. Ghazali, H. P. Heim, M. Feldmann and M. Mariatti, Polymer Composites, 42(1), 57-69 (2021). https://doi.org/10.1002/pc.25807

E. A. S. Filho, C. B. B. Luna, A. L. Silva, E. S. B. Ferreira, E. M. Araújo, A. C. F. M. Costa, MOMENTO, (64), 66–82 (2022). https://doi.org/10.15446/mo.n64.99725

V. A. D. Marinho, T. G. Almeida, L. H. Carvalho and E. L. Canedo, Revista Eletrônica de Materiais e Processos, 13(1), 37-41 (2018). http://www2.ufcg.edu.br/revista-remap/index.php/REMAP/article/view/647

J. C. C. Lima, J. P. Araújo, P. Agrawal and T. J. A. Mélo, Revista Eletrônica de Materiais e Processos, 11(1), 10–17 (2016). http://www2.ufcg.edu.br/revista-remap/index.php/REMAP/article/view/497

J. D. V. Barbosa, J. B. Azevedo, E. M. Araújo, B. A. S. Machado, K. V. S. Hodel and T. J. A. Mélo, Polímeros, 29(3), e2019045 (2019). https://doi.org/10.1590/0104-1428.09018

J. D. Viana, E. M. Araújo and T. J. A. Mélo, Revista Eletrônica de Materiais e Processos, 7(1), 20 – 25 (2012). http://www2.ufcg.edu.br/revista-remap/index.php/REMAP/article/view/242

E. A. S. Filho, C. B. B. Luna, D. D. Siqueira, E. S. B. Ferreira and E. M. Araújo, Polymers, 14(1), 136 (2022). https://doi.org/10.3390/polym14010136

A. C. S. Oliveira and S. V. Borges, Revista Eletrônica de Materiais e Processos, 15(1), 1-10 (2020). http://www2.ufcg.edu.br/revista-remap/index.php/REMAP/article/view/713

M. Maiza, M. T. Benaniba, G. Quintard and V. M. Nageotte, Polímeros: Ciência e Tecnologia, 25(6), 581-590 (2015). http://dx.doi.org/10.1590/0104-1428.1986

C. B. B. Luna, D. D. Siqueira, E. M. Araújo and R. M. R. Wellen, MOMENTO, (62), 1–17 (2021). https://doi.org/10.15446/mo.n62.89099

J. P. Araújo, P. Agrawal and T. J. A. Mélo Revista Eletrônica de Materiais e Processos, 10(3), 118–127 (2015). http://www2.ufcg.edu.br/revista-remap/index.php/REMAP/article/view/475

P. Lohrasbi and J. K. Yeganeh, Polymers for Advanced Technologies, 32(11), 4326-4339 (2021). https://doi.org/10.1002/pat.5435

M. E. M. Duarte, I. A. E. Moreno, P. E. G. Casillas and A. V. Rios, Polymers, 13(24), 4279 (2021). https://doi.org/10.3390/polym13244279

M. Maroufkhani, A. Katbab, H. Bizhani and J. Zhang, Polymer, 217(3), 123439 (2021). https://doi.org/10.1016/j.polymer.2021.123439

E. S. B. Ferreira, C. B. B. Luna, D. D. Siqueira, E. M. Araújo, D. C. França and R. M. R. Wellen, Journal of Polymers and the Environment, 30(2), 541–554 (2022). https://doi.org/10.1007/s10924-021-02220-4

R. B. Pereira and A. R. Morales, Polímeros, 24(2), 198-202 (2014). https://doi.org/10.4322/polimeros.2014.042

N. Zaldua, A. Mugica, M. Zubitur, A. Iturrospe, A. Arbe, G. Lore, J. M. Raquez, P. Dubois and A. J. Muller, CrystEngComm, 18, 9334-9344 (2016). https://doi.org/10.1039/C6CE02005D

P. Borysiuk, P. Boruszewski, T. Auriga, L. Danecki, A. Auriga, K. Rybak and M. Nowacka, Journal of Materials Science, 56, 9196–9208 (2021). https://doi.org/10.1007/s10853-021-05901-6

B. M. Trinh, E. O. Ogunsona, T. H. Mekonnen, Composites Part A: Applied Science and Manufacturing, 140, 106150 (2021). https://doi.org/10.1016/j.compositesa.2020.106150

N. Tripathi, M. Misra, A. K. Mohanty, ACS Engineering Au, 1,7–38 (2021). https://doi.org/10.1021/acsengineeringau.1c00011

M. Maroufkhani, A. Katbab, H. Bizhani, J. Zhang, Polymer, 217, 123439 (2021). https://doi.org/10.1016/j.polymer.2021.123439

J. M.F. Silva and B G. Soares, Polymer Testing, 93, 106889 (2021). https://doi.org/10.1016/j.polymertesting.2020.106889

S. Su, Materials Research Express, 9, 025308 (2022). https://doi.org/10.1088/2053-1591/ac55c7

C. B. B. Luna, D. D. Siqueira, E. S. B. Ferreira, E. M. Araújo and R. M. R. Wellen, Journal of Elastomers & Plastics, 53(8), 1045-1062 (2021). https://doi.org/10.1177/00952443211015345

J. D. Ambrósio, L. A. Pessan, N. M. Larocca and E. H. Júnior, Polímeros, 20(4), 315-321 (2010). https://doi.org/10.1590/S0104-14282010005000051

C. B. B. Barreto, D. D. Siqueira, and et al., J. Vib. Eng. Technol. 27, 736 (2021). https://doi.org/10.1002/vnl.21846

T. S. Alves, J. E. S. Neto, S. M. L. Silva, L. H. Carvalho and E. L. Canedo, Polymer Testing, 50(4), 94-100 (2016). https://doi.org/10.1016/j.polymertesting.2016.01.002

T. G. Almeida, J. E. S. Neto, A. R. M. Costa, A. S. Silva, L. H. Carvalho and E. L. Canedo, Polymer Testing, 55(10), 204-211, 2016. https://doi.org/10.1016/j.polymertesting.2016.08.018

E. L. Canedo, Processamento de Pol´ımeros no Misturador Interno de Laboratòrio 2aEd (PPGCEMat-UFCG: Campina Grande, PB, 2017). https://doi.org/10.1590/1980-5373-MR-2020-0238

D. S. C. Andrade, E. L. Canedo, L. H. Carvalho, R. Barbosa, and T. Alves, Mater. Res. 24, e20200238 (2021).https://doi.org/10.1590/1980-5373-MR-2020-0238

J. C. Lima, J. C. Sousa, S. A. Arruda, Y. M. B. Almeida, and E. L. Canedo, Polym. Comp. 40, E678 (2019). https://doi.org/10.1002/pc.24951

L. Reul, C. Pereira, F. Sousa, R. Santos, L. Carvalho, and E. Canedo, Polym. Comp. 40, E540 (2018). https://doi.org/10.1002/pc.24861

E. B. Bezerra, D. C. Fran¸ca, D. D. S. Morais, E. S. B. Ferreira, A. E. M., and R. R.Wellen, Matéria (Rio J.) 22, e11798 (2017). https://doi.org/10.1590/S1517-707620170001.0130

F. M. Sousa, A. R. M. Costa, and et al., Polym. Bull. 76, 1573–1593 (2018). https://doi.org/10.1007/s00289-018-2428-5

A. R. M. Costa, L. T. A. Reul, and et al., Polym. Test. 69, 266 (2018). https://doi.org/10.1016/j.polymertesting.2018.05.031

L. T. Reul, L. H. Carvalho, and E. L. Canedo, REMAP 12, 174 (2017). http://www2.ufcg.edu.br/revista-remap/index.php/REMAP/article/view/629

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.

Those authors who have publications with this journal, accept the following terms:

a. The authors will retain their copyright and will guarantee the publication of the first publication of their work, which will be subject to the Attribution-SinDerivar 4.0 International Creative Commons Attribution License that permits redistribution, commercial or non-commercial, As long as the Work circulates intact and unchanged, where it indicates its author and its first publication in this magazine.

b. Authors are encouraged to disseminate their work through the Internet (eg in institutional telematic files or on their website) before and during the sending process, which can produce interesting exchanges and increase appointments of the published work.