Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.1947
Polímeros: Ciência e Tecnologia
Scientific & Technical Article

Natural rubber latex: determination and interpretation of flow curves

Corrêa, Harrison Lourenço; Sousa, Ana Maria Furtado; Furtado, Cristina R. G.

Downloads: 0
Views: 336

Abstract

As consumers become more demanding, the importance grows of guaranteeing the quality of products. The employment of reliable testing techniques that assure the origin and characteristics of the inputs used by industry is a key factor in this respect. In the rubber processing industry, the most commonly used characterization tests include determination of the total solids and dry rubber content, mechanical stability, odor, color and presence of volatile compounds, among others. For the most part, these tests are sufficient for the latex transformation industry. However, in situations where there is a need to know the behavior of latex in reaction to the mechanical forces of machines (mixers, pumps, etc.), other tests must be used. Rheological tests to determine viscoelastic data by means of plotting flow curves combined with the application of theoretical models can provide important details for characterization of different types of latex. This article presents the protocol employed by the Rheology and Image Laboratory of Rio de Janeiro State University (UERJ) for the rheological study of Brazilian latex. The samples analyzed came from the state of São Paulo.

Keywords

latex, natural rubber, rheology.

References

1. American Standard Testing for Materials - ASTM. (2010). ASTM D1076: Standard specification for rubber-concentrated, ammonia preserved, creamed and centrifuged natural latex. West Conshohocken.

2. Jawjit, W., Pavasant, P., & Kroeze, C. (2015). Evaluating environmental performance of concentrated latex production in Thailand. Journal of Cleaner Production, 98, 84-91. http://dx.doi.org/10.1016/j.jclepro.2013.11.016.

3. Siler, D. J., & Cornish, K. (1995). Measurement of protein in natural rubber latex. Analytical Biochemistry, 229(2), 278-281. http://dx.doi.org/10.1006/abio.1995.1413. PMid:7485983.

4. Bonfils, F., Ehabe, E. E., Aymard, C., Vaysse, L., & Sainte-Beuve, J. (2007). Enhanced solvent extraction of polar lipids associated with rubber particles from Hevea brasiliensis. Journal of Phytochemical Analysis, 18(2), 103-108. http://dx.doi.org/10.1002/pca.956. PMid:17439009.

5. Liengprayoon, S., Bonfils, F., Sainte-beuve, J., Sriroth, K., Dubreucq, E., & Vaysse, L. (2008). Development of a new procedure for lipid extraction from hevea brasiliensis natural rubber. European Journal of Lipid Science and Technology, 110(6), 563-569. http://dx.doi.org/10.1002/ejlt.200700287.

6. Sansatsadeekul, J., Sakdapipanich, J., & Rojruthai, P. (2011). Characterization of associated proteins and phospholipids in natural rubber latex. Journal of Bioscience and Bioengineering, 111(6), 628-634. http://dx.doi.org/10.1016/j.jbiosc.2011.01.013. PMid:21354367.

7. Jatuporn, S. (2006). Rheological properties of natural rubber latex (Master’s thesis). Suranaree University of Technology, Thailand.

8. Barnes, H. (2000). A handbook of elementary rheology. Aberystwyth: Cambrian Printers.

9. D’Urso, P., & Santoro, A. (2006). Goodness of fit and variable selection in the fuzzy multiple linear regression. Fuzzy Sets and Systems, 157(19), 2627-2647. http://dx.doi.org/10.1016/j.fss.2005.03.015.

10. Brown, A. M. (2001). A step-by-step guide to non-linear regression analysis of experimental data using a Microsoft Excel spreadsheet. Computer Methods and Programs in Biomedicine, 65(3), 191-200. http://dx.doi.org/10.1016/S0169-2607(00)00124-3. PMid:11339981.

11. Perry, R., Green, D., & Maloney, J. (1999). Perry’s chemical engineers’ handbook. United States: McGraw-Hill.

12. Macosko, C. (1994). Rheology, principles, measurements and applications. United States: Wiley-VCH.

13. Sorbie, K., Clifford, P., & Jones, E. (1989). The rheology of pseudoplastic fluids in porous media using network modeling. Journal of Colloid and Interface Science, 130(2), 508-534. http://dx.doi.org/10.1016/0021-9797(89)90128-8.
588371c47f8c9d0a0c8b4a5c polimeros Articles
Links & Downloads

Polímeros: Ciência e Tecnologia

Share this page
Page Sections