All Title Author
Keywords Abstract

Publish in OALib Journal
ISSN: 2333-9721
APC: Only $99

ViewsDownloads

Relative Articles

Polyethylene/synthetic boehmite alumina nanocomposites: Structure, thermal and rheological properties

Thermal Stability and Rheological Behaviors of High-Density Polyethylene/Fullerene Nanocomposites

The Effect of Poly-Ethylene-co-Glycidyl Methacrylate Efficiency and Clay Platelets on Thermal and Rheological Properties of Wood Polyethylene Composites

Mechanical, Thermal and Crystallization Properties of Polypropylene (PP) Reinforced Composites with High Density Polyethylene (HDPE) as Matrix

Study of the Thermal, Rheological, Morphological and Mechanical Properties of Biocomposites Based on Rod-Of Typha/HDPE Made up of Typha Stem and HDPE

The effects of particle size and content on the thermal conductivity and mechanical properties of Al2O3/high density polyethylene (HDPE) composites

Thermal, Mechanical and Rheological Properties of Low Density/Linear Low Density Polyethylene Blend for Packing Application

Mechanical, Thermal, Morphological and Rheological Properties of Polypropylene/Ultrahigh Molecular Weight Polyethylene Blends
Mechanical, Thermal, Morphological and RheologicalProperties of Polypropylene/Ultrahigh Molecular Weight Polyethylene Blends

聚乙二醇改性相变微胶囊-木粉/高密度聚乙烯复合材料的制备与热性能
Preparation and thermal properties of WF/HDPE composites filled with microcapsules modified by polyethylene glycol

Thermal Analysis, Mechanical and Rheological Behaviour of Melt Manufactured Polyethylene/Liquid Crystal Polymer Blends

More...

Rheological and Thermal Behavior of High-Density Polyethylene (HDPE) at Different Temperatures

DOI: 10.4236/msa.2014.513094, PP. 923-931

Keywords: HDPE, Rheology, Degradation, DSC, FTIR

Full-Text   Cite this paper   Add to My Lib

Abstract:

In the present work, rheological properties of HDPE samples were measured at temperatures of 150°C, 190°C and 230°C. It was shown, by oscillatory tests, at low frequencies, that, for temperatures of 150°C and 190°C, there was a predominance of the viscous behavior over the elastic one. At 230°C, there was a predominance of the elastic contribution, and there was an increase of the molar mass compared with the ones obtained from the tests at 150°C and 190°C. The results obtained from the temperature ramp oscillatory test showed that, up to around 248°C, the viscous behavior prevailed, the opposite being observed at higher temperatures. At 230°C the sample showed significantly lower values of strain when compared with the ones observed at 150°C and 190°C. Oxidative induction time (OIT), melting point and degree of crystallinity were determined by differential scanning calorimetry (DSC). The DSC results and the rheological measurements showed a completely different behavior for the HDPE samples at 230°C compared with the 150°C and the 190°C ones, suggesting that HDPE, at the temperature of 230°C, underwent thermo-oxidative degradation with the initial predominance of crosslinking.

References

[1]  Cheng, J.J. (2008) Mechanical and Chemical Properties of High Density Polyethylene: Effects of Microstructure on Creep Characteristics. Doctoral Thesis, University of Waterloo, Canada.
[2]  Parrondo, A., Allen, N.S., Edge, M., Liauw, C.M., Fontán, E. and Corrales, T. (2002) Additive Interactions in the Stabilization of Film Grade High-Density Polyethylene. Part I: Stabilization and Influence of Zinc Stearate during Melt Processing. Journal of Vinyl & Additive Technology, 8, 75-89.
http://dx.doi.org/10.1002/vnl.10349
[3]  De Paoli, M.A. (2008) Degradacao e Estabilizacao de Polímeros. Artliber Editora Ltda, Sao Paulo.
[4]  Mesquita, F.A. (2010) Modification of High Density Polyethylene Properties after Different Extrusion Conditions. M.Sc. Dissertation, University of Sao Paulo, Sao Paulo.
[5]  Mendes, L.A.A. (2006) Study of Mechanisms of Degradation of the Polyethylene in Primary Recycling. Doctoral Thesis, University of Minho, Braga.
[6]  Ferry, J.D. (1980) Viscoelastic Properties of Polymers. Wiley, New York.
[7]  Peacock, A.J. (2000) Handbook of Polyethylene—Structures, Properties and Applications. Marcel Dekker, New York.
[8]  Understanding Rheology of Thermoplastic Polymers (TA Instruments) (2004)
http://www.tainstruments.com/pdf/literature/AAN013_V_1_U_Thermoplast.pdf
[9]  Erbetta, C.D.C., Silva, M.E.S.R., Freitas, R.F.S. and Sousa, R.G. (2013) Evaluation of Thermal, Chemical and Rheological Properties of High Density Polyethylene (HDPE) Additives with Pro-Degrading Agent, after Processing. Proceedings of the 12th Brazilian Congress of Polymers, Florianópolis, 22-26 September 2013, 1-4.
[10]  Cruz, S.A., Farah, M., Zanin, M. and Bretas, R.E.S. (2008) Evaluation of Rheological Properties of Virgin HDPE/ Recycled HDPE Blends. Polímeros: Ciência e Tecnologia, 18, 144-151.
http://dx.doi.org/10.1590/S0104-14282008000200012
[11]  Guimaraes, M.J.O.C., Coutinho, F.M.B., Rocha, M.C.G., Bretas, R.E.S. and Farah, M. (2003) Rheology of High Density Polyethylene Toughened with Elastomeric Polyethylene. Polímeros: Ciência e Tecnologia, 13, 135-140.
http://dx.doi.org/10.1590/S0104-14282003000200013
[12]  Snyder, R.G. (1980) Spectroscopic Methods—Methods in Experimental Physics. Vol. 16, Part A, Academic Press, New York.
[13]  Pinheiro, L.A., Chinelatto, M.A. and Canevarolo, S.V. (2004) The Role of Chain Scission and Chain Branching in High Density Polyethylene during Thermo-Mechanical Degradation. Polymer Degradation and Stability, 86, 445-453.
http://dx.doi.org/10.1016/j.polymdegradstab.2004.05.016
[14]  Hinsken, H., Moss, S., Pauchet, J. and Zweifel, H. (1991) Degradation of Polyolefins during Melt Processing. Polymer Degradation and Stability, 34, 279-293.
http://dx.doi.org/10.1016/0141-3910(91)90123-9
[15]  Scuracchio, C.H, Bretas, R.E.S. and Isayev, A.I. (2004) Blends of PS with SBR Devulcanized by Ultrasound: Rheology and Morphology. Journal of Elastomers and Plastics, 36, 45-75.
http://dx.doi.org/10.1177/0095244304039913
[16]  Torres, A.A.U. (2007) Physicochemical Ageing of HDPE Pipes Assigned to the Transportation of Petroleum Derivatives. M.Sc. Dissertation, Catholic University of Rio de Janeiro, Rio de Janeiro.
[17]  Moss, S. and Zweifel, H. (1989) Degradation and Stabilization of High Density Polyethylene during Multiple Extrusions. Polymer Degradation and Stability, 25, 217-245.
http://dx.doi.org/10.1016/S0141-3910(89)81009-2
[18]  Azevedo, J.B., Chávez, M.A. and Rabello, M.S. (2010) The Effect of a Crosslinking Agent on the Morphology and Physical and Mechanical Properties of Polymer Foams Based on EVA and EPDM. Polímeros: Ciência e Tecnologia, 20, 407-414.
http://dx.doi.org/10.1590/S0104-14282011005000002
[19]  Hoàng, E.M., Allen, N.S., Liauw, C.M., Fontán, E. and Lafuente, P. (2006) The Thermo-Oxidative Degradation of Metallocene Polyethylenes: Part 2: Thermal Oxidation in the Melt State. Polymer Degradation and Stability, 91, 13631372.
http://dx.doi.org/10.1016/j.polymdegradstab.2005.07.018

Full-Text

comments powered by Disqus