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Abstract

The comparative study between two curing agents, conventional peroxide (Peroximon) and bismaleimide/dicumyl peroxide combination (BMI/DCP), and the influence of composition in TPE-Vs based on polypropylene (PP) and ethylene—propylene—diene terpolymer (EPDM) were investigated. The materials were characterized by mechanical, hardness, swelling and morphological properties. The TPE-Vs obtained using Peroximon presented lower tensile strength, remarkable lower deformation and swelling degrees than those cured with BMI/DCP. Among all the investigated PP/EPDM compositions, the content of thermoplastic increases the tensile at break. The experimental swelling values are in agreement with the theoretical for the TPE-Vs obtained using BMI/DCP and for the obtained using Peroximon all compositions showed experimental swelling degree higher than the theoretical ones. The hardness is determined by the amount of PP. We also observed in the morphology studies that the rubber domains are smaller and better defined when the BMI/DCP is used.

Keywords

thermoplastic elastomers dynamic vulcanization peroxide bismaleimide polypropylene EPDM TPV.

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References

<CF f="AdvPECFBA7" n="8.970000"/> Levy, M. (1990). Elastomeric Alloys: A Realistic Solution to Some Typical Problems of the Rubber Industry? Kautschuk und Gummi Kunststoffe, 43: 443-445.

Payne, M.T. and Rader, C.P. ( 1993). Thermoplastic Elastomers: A Ring Star, In: Cheremisinoff, N.P. (ed.), Elastomer Technology Handbook, Boca Raton, CRC Press, pp. 575-576.

Coran, A.Y. and Patel, R.P. ( 2004). Thermoplastic Elastomers Based on Dynamically Vulcanized Elastomer-Thermoplastic Blends, In: Holden, G. , Kricheldorf, H.R. and Quirk, R. (eds), Thermoplastic Elastomers, 3nd edn, Munich, Hanser Publishers, p. 143.

Nakason, C. , Nuansomsri, K. , Kaesaman, A. and Kiatkamjornwong, S. ( 2006). Dynamic Vulcanization Of Natural Rubber/High-Density Polyethylene Blends: Effect of Compatibilization, Blend Ratio and Curing System, Polym. Test., 25: 782-796.

Hernández, M. , Albano, C. , González , J. and Ichazo, M.N. (2006). Vulcanization on Rheological and Thermal Properties of PP/NR Blends, Polymer Bull., 56: 285-291.

Ismail, H. ( 2002). Thermoplastic Elastomers Based on Polypropylene/ Natural Rubber and Polypropylene/Recycle Rubber Blends, Polym. Test. , 21: 389-395.

Varghese, S. , Alex, R. and Kuriakose, B. ( 2004). Natural Rubber- Isotactic Polypropylene Thermoplastic Blends, J. Appl. Polym. Sci., 92: 2063-2068.

Nakason, C. , Wannavilai, P. and Kaesaman, A. ( 2006). Effect of Vulcanization System on Properties of Thermoplastic Vulcanizates Based on Epoxidized Natural Rubber/Polypropylene Blends, Polym . Test., 25: 34-41.

Thitithammawong, A. , Nakason, C. , Sahakaro, K. and Noordermeer , N. (2007). Effect of Different Types of Peroxides on Rheological, Mechanical, and Morphological Properties of Thermoplastic Vulcanizates Based on Natural Rubber/Polypropylene Blends, Polym. Test., 26: 537-546.

10.

van Duin, M. and Machado, A.V. (2005). EPDM-based Thermoplastic Vulcanisates: Crosslinking Chemistry and Dynamic Vulcanisation along the Extruder Axis, Polym. Degrad. Stabil., 90: 340-345.

11.

Machado, A.V. and van Duin, M. (2005). Dynamic Vulcanisation of Epdm/ Pe-Based Thermoplastic Vulcanisates Studied along the Extruder Axis , Polymer, 46: 6575-6586.

12.

Jacobi, M.M. , Schneider, L.K. , Freitas, L.L. and Schuster, R.H. (2006). Properties and Morphology of Thermoplastic Vulcanizates Based on PP/SBR and PP/EpSBR, Kautschuk und Gummi Kunststoffe, 59: 49-54.

13.

Zhang, X. , Huang, H. and Zhang, Y. ( 2000). Dynamically Vulcanized Nitrile Rubber/Polypropylene Thermoplastic Elastomers, J. Appl. Polym. Sci., 85: 2862-2866.

14.

Manchado, M.A.L. and Arroyo, M. (2001). New Developments in Dynamically Cured PP-EPDM Blends, Rubber Chem. Technol., 74: 211-220.

15.

Sabet, S.A. , Puydak, R.C. and Rader, C.P. (1995). Dynamically Vulcanized Thermoplastic Elastomers, Rubber Chem. Technol., 69: 476-494.

16.

van Duin, M. (2006). Recent Developments for EPDM-Based Thermoplastic Vulcanisates, Macromol. Symp., 233: 11-16.

17.

Naskar, K. and Noordermeer, J.W.M. ( 2004). Dynamically Vulcanized PP/EPDM Blends: Multifunctional Peroxides as Crosslinking Agents - Part I, Rubber Chem. Tech. , 77: 955-971.

18.

Naskar, K. and Noordermeer, J.W.M. ( 2004). Multifunctional Peroxides as a Means to Improve Properties of Dynamically Vulcanized PP/EPDM Blends, Kautschuk und Gummi Kunststoffe, 57: 235-239.

19.

Manchado, M.A.L. and Kenny, J.M. (2001). Use of Benzene-1,3-Bis-(sulfonyl)Azide as Crosslinking Agent of TPVs Based on EPDM Rubber-Polyolefin Blends, Rubber Chem. Technol., 74: 198-210.

20.

Radusch, H.J. , Luepke, Th. , Poltersdorf, St. and Laemmer, E. (1990). Dynamic Vulcanizates on the Basis of Polypropylene/Rubber Mixtures, Kautschuk und Gummi Kunststoffe, 43: 767-769.

21.

Maiti, M. , Patel, J. , Naskar, K. and Bhowmick, A.K. ( 2006). Influence of Various Crosslinking Systems on the Mechanical Properties of Gas Phase EPDM/PP Thermoplastic Vulcanizates, J. Appl. Polym. Sci., 102: 5463-5471.

Dynamically Vulcanized PP/EPDM Blends: Effect of Composition and Curing Agents

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