Home Effects of Zinc Salts of Sulfonated Natural Rubber on Mechanical Properties, Morphology and Compatibility of Natural Rubber/Chlorosulfonated Polyethylene Blends
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Effects of Zinc Salts of Sulfonated Natural Rubber on Mechanical Properties, Morphology and Compatibility of Natural Rubber/Chlorosulfonated Polyethylene Blends

  • N. Lopattananon , K. Boonsong and M. Seadan
Published/Copyright: March 26, 2013
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Abstract

Rubbery ionomer based on zinc salt of sulfonated natural rubber (Zn-SNR) was employed as a new compatibilizer to prepare blends of natural rubber (NR) and chlorosulfonated polyethylene (CSM) with different compositions by melt mixing process. Epoxidized natural rubber (ENR), known as an effective compatibilizer for such blends, was also incorporated into the blends. The role of ionomer and ENR on NR/CSM blend properties and morphology was evaluated by mean of tensile measurement, oil resistance testing, DMTA and SEM. The tensile properties and oil resistance of the blends were found to increase with respect to CSM content, and increased further on compatibilization with Zn-SNR and ENR. The blends compatibilized with Zn-SNR showed a similar or higher level of improvement in tensile strength and elongation at break as compared to those of ENR. The tensile strength for all of the compatibilized blends was greater than that of corresponding neat blends by 23 to 113%. The mechanism for enhancing in tensile properties of the blends using the Zn-SNR compatibilizing agent has been proposed. The observation of DMTA and SEM showed that the blends were two-separated phase morphology. However, the addition of Zn-SNR to NR/CSM blends resulted in promoted compatibility as indicated by a shift in the tan peak of CSM to lower temperature, a reduction in dispersed phase size and better adhesion between NR and CSM. These results demonstrated that the Zn-SNR is a new reactive compatibilizer for NR and CSM blends.


Mail address: Natinee Lopattananon, Department of Rubber Technology and Polymer Sciences, Faculty of Science and Technology, Prince of Songkla University, Pattani, 94000, Thailand. E-mail address:

References

Agarwal, P. K., et al., “Infra-red Investigation of Sulphonated EPDM Polymers”, Polymer, 28, 14671471 (1987)10.1016/0032-3861(87)90343-0Search in Google Scholar

Barlow, J. W., Paul, D. R., “Mechanical Compatibilization of Immiscible Blends”, Polym. Eng. Sci., 24, 525534 (1984)10.1002/pen.760240804Search in Google Scholar

U.S. Patent 3642728 (1972) Canter, N. H.Search in Google Scholar

Dutta, D., et al., “Compatibilization of Blends Containing Thermotropic Liquid Crystalline Polymers with Sulfonate Ionomers”, Polymer, 37, 429435 (1996)10.1016/0032-3861(96)82912-0Search in Google Scholar

Davey, J. E., Loadman, M. J., “A Chemical Demonstration of the Randomness of Epoxidation of Natural Rubber”, Brit. Polym. J., 16, 134138 (1984)10.1002/pi.4980160305Search in Google Scholar

Faullimmel, J. G., et al., “Sulfonated Natural Rubber. I. Sulfonation by Acetyl Sulfate”, J. Sci. Res. Chula. Univ., 15, 310 (1990)Search in Google Scholar

Lepers, J. C., et al., “The Relative Role of Coalescence and Interfacial Tension on Controlling Dispersed Phase Size Reduction during the Compatibilization of Polyethylene Terephthalate/Polypropylene Blends”, J. Polym. Sci., Part B, Polym. Phys., 35, 22712280 (1997)10.1002/(SICI)1099-0488(199710)35:14<2271::AID-POLB7>3.0.CO;2-ZSearch in Google Scholar

Lu, X., Weiss, R. A., “Specific Interactions and Ionic Aggregation in Miscible Blends of Nylon-6 and Zinc Sulfonated Polystyrene Ionomer”, Macromolecule, 25, 61856189 (1992)10.1021/ma00049a015Search in Google Scholar

Maynard, J. T., Johnson, P. R., “Ionic Crosslinking of Chlorosulfonated Polyethylene”, J. Appl. Polym. Sci., 7, 19431950 (1963)10.1002/app.1963.070070529Search in Google Scholar

Mukhopadhyay, S., De, S. K., “Self-vulcanizable Rubber Blend System based on Epoxidized Natural Rubber and Chlorosulphonated Polyethylene”, J. Mater. Sci., 25, 40274031 (1990)10.1007/BF00582476Search in Google Scholar

Mukhopadhyay, S., De, S. K., “Miscibility of Self-vulcanizable Rubber Blend based on Epoxidized Natural Rubber and Chlorosulfonated Polyethylene: Effect of Blend Composition, Epoxy Content of Epoxidized Natural Rubber and Reinforcing Black Filler”, Polymer, 32, 12231229 (1991)10.1016/0032-3861(91)90225-8Search in Google Scholar

Nakason, C., et al., “Preparation, Thermal and Flow Properties of Epoxidized Natural Rubber”, Songkla. J. Sci. Techn., 23, 415424 (2001)Search in Google Scholar

Nersasian, A., et al., “Novel Curing Systems for Chlorosulfonated Polyethylene”, J. Appl. Polym. Sci., 8, 337354 (1964)10.1002/app.1964.070080121Search in Google Scholar

Rahrig, D., et al., “Sulfonation of a Polypentamer and Preparation of its Hydrogenated Derivatives”, Macromolecule, 12, 195203 (1979)10.1021/ma60068a006Search in Google Scholar

Roychoudhury, A., et al., “FTIR and NMR studies on Crosslinking Reation between Chlorosulfonated Polyethylene and Epoxidized Natural Rubber”, Rubber. Chem. Techn., 66, 230241 (1993)10.5254/1.3538308Search in Google Scholar

Sirisinha, C., et al., “Oil Resistance Controlled by Phase Morphology in Natural Rubber/Nitrile Rubber Blends”, J. App. Polym. Sci., 87, 8389 (2003)10.1002/app.11673Search in Google Scholar

Sirisinha, C., et al., “Oil and Thermal Aging Resistance in Compatibilized and Thermally Stabilized Chlorinated Polyethylene/Natural Rubber Blends”, Polymer, 45, 49094916 (2004)10.1016/j.polymer.2004.05.015Search in Google Scholar

Sirqueira, A. S., Soares, B. G., “The Effect of Mercapto-and Thioacetate-modified EPDM on the Curing Parameters and Mechanical Properties of Natural Rubber/EPDM Blends”, Eur. Polym. J., 39, 22832290 (2003)10.1016/S0014-3057(03)00163-0Search in Google Scholar

Son, Y., Weiss, R. A., “Compatibilization of Syndiotactic Polystyrene and a Thermotropic Liquid-Crystalline Polymer Blend with a Zinc Salt of a Sulfonated Polystyrene Ionomer”, J. Appl. Polym. Sci., 87, 564568 (2003)10.1002/app.11467Search in Google Scholar

Tanrattanakul, V., Petchkaew, A., “Mechanical Properties and Blend Compatibility of Natural rubber-Chlorosulfonated Polyethylene Blends”, J. Appl. Polym. Sci., 99, 127140 (2006)10.1002/app.22500Search in Google Scholar

Weiss, R. A., et al., “Block Copolymer Ionomers: 1. Synthesis and Physical Properties of Sulphonated Poly(styrene-ethylene/butylene-styrene)”, Polymer, 32, 18671874 (1991)10.1016/0032-3861(91)90378-VSearch in Google Scholar

Wootthikanokkhan, J., Tongrubbai, B., “A Study on Morphology and Physical Properties of Natural-Acrylic Rubber Blends”, J. App. Polym. Sci., 86, 15321539 (2002)10.1002/app.10899Search in Google Scholar

Xavier, T., et al., “Synthesis and Characterization of Novel Melt-Processable Ionomers based on Radiation Induced Styrene Grafted Natural Rubber”, Macromol. Mater. Eng., 286, 507512 (2001)10.1002/1439-2054(20010901)286:9<507::AID-MAME507>3.0.CO;2-7Search in Google Scholar

Xie, H.-Q., et al., “Preparation, Characterization, and Some Properties of Ionomers from a Sulfonated Styrene-Butadiene-Styrene Triblock Copolymer without Gelation”, J. Appl. Polym. Sci., 96, 13981404 (2005)10.1002/app.21570Search in Google Scholar

Xie, H.-Q., et al., “Behaviour of Ionomers of Sulfonated Styrene-Butadiene-Styrene Triblock Copolymer in Polymer Blends with Crystalline Polyolefins and as Compatibilizer”, J. Appl. Polym. Sci., 99, 18871894 (2006)10.1002/app.22657Search in Google Scholar

Received: 2006-12-1
Accepted: 2007-7-1
Published Online: 2013-03-26
Published in Print: 2007-09-01

© 2007, Carl Hanser Verlag, Munich

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