Synthesis and Characteristics of MAH-g-EPDM Compatibilized EPDM/NBR Rubber Blends

Abstract

Maleated ethylene-propylene diene monomer rubber (MAH-g-EPDM) was prepared on a two-roll mill and tested as a compatibilizer for EPDM/NBR (butadiene-acrylonitrile rubber) blend. Intrinsic viscosity measurements and scanning electron microscopy revealed that MAH-g-EPDM improved the compatibility and morphology of EPDM/NBR blend. The uncompatibilized blend showed a negative deviation in the mechanical properties after aging, from the straight line of the additive rule. However, the compatibilized blend showed a positive deviation. Also, MAH-g-EPDM improved the co-curing of EPDM and NBR rubbers. The effect of blend ratio on the heat resistance and upon the stability against UV of the elastomer blend is discussed in terms of the mechanical properties.

Keywords

NBR EPDM grafted EPDM elastomer blend compatibilizer maleated EPDM

Get full access to this article

View all access options for this article.

References

Viviano, B. and Roberto, F. Process for Grafting Maleic Anhydride on Olefinic Polymers, US Patent 4929682, 1990-05-29 [C08F255/04, C08F255/06, C08F291/02].

Norbert, H. , Guenther, S. , Hans, G. and Rainer, W. Grafting Polyolefin Blends and use of the Graft Copolymer Blends as an Adhesion Promoter and for the Preparation of Ionomers, US Patent 4906690, 1990-03-06 [C08F255/04, C08F287/00].

Chen, D. and Kennedy, J. P. (1987). Quantitative Characterization of Rubbery Ethylene-Propylene Copolymers used in some Commercial High Impact Nylons , Polymer Bulletin (Berlin), 17(1): 71-77 .

Coutinho, F. M. B. and Ferreira, M. I. P. (1994). Characterization of EPDM Rubber Modified with Maleic Anhydride (MAH) by Diffuse Reflectance FTIR (DRIFT) , Polymer Testing, 13(1): 25-34 .

Seo, Y. (1998). TLCP Ternary Blends for in situ Composites: In situ Compatibilizer , Journal of Applied Polymer Science, 70(8): 1589-1595 .

Xie, H. Q. , Feng, D. S. and Guo, J. S. (1997). Solution Maleation of EPDM and Blending of Acetal Copolymer with Rubber using Maleated EPDM as Compatibilizer , Journal of Applied Polymer Science, 64(2): 329-335 .

Kole, S. , Roy, S. and Bhowmick, A. K. (1995). Influence of Chemical Interaction on the Properties of Silicone-EPDM Rubber Blend , Polymer, 36(17): 3273-3277 .

Borggreve, R. J. M. and Gaymans, R. J. (1989). Impact Behavior of Nylon-Rubber Blends. 4. Effect of the Coupling Agent , Maleic Anhydride, Polymer, 30(1): 63-70 .

Ching, D. P. , Mercer, F. W. and Diazm, A. F. (1997). Characterization of Blends of Maleic Anhydride Grafted EPDM and Nylon 12 , Polymer-Preprints,-Division-of-Polymer-Chemistry,-American-Chemical-Society, 38(1): 88-89 .

10.

Antony, P. and De, S. K. (1999). Ionomeric Polyblends of Zinc Salts of Maleated EPDM Rubber and Poly (ethylene-co-acrylic acid). 1. Effect of Blend Ratio , Journal of Applied Polymer Science, 71(8): 1247-1256 .

11.

Antony, P. , Bhattacharya, A. K. and De, S. K. (1999). Ionomeric Polyblends of Zinc Salts of Maleated EPDM Rubber and Poly (ethylene-co-acrylic acid). 2. Effect of Zinc Stearate on Processability , Journal of Applied Polymer Science, 71(8): 1257-1265 .

12.

Thomes, Y. U. and Thomas, D. J. Blends of Polyamides, Polyesters and Maleic Anhydride Modified EPDM Rubbers, US Patent EP0282153, 1988-09-14 [C08L77/00].

13.

Botros, S. H. , Kenawy, M. E. , Younan, A. F. and El-kashef, I. M. (2000). Thermal Stability , Swelling Behavior and Dielectric Properties of NBR/PVC-PVAC Blends, Kautschuk und Gummi Kunststoffe, 53(12): 722-729 .

14.

Yehia, A. A. , Helaly, F. M. and Elsabbagh, S. H. (1992). Studies on Mixing Homogeneity of Rubber Blends using Vicosity Measurements , Journal of Elastomers and Plastics, 24(1): 15-26 .

15.

Mohamed, M. G. , Abd-EL-Messieh, S. L. , El-Sabbagh, S. and Younan, A. F. (1998). Electrical and Mechanical Properties of Polyethylene-Rubber Blends , Journal of Applied Polymer Science, 69: 775-783 .

16.

Younan, A. F. , Abd-EL-Messieh, S. L. and Gasser, A. A. (1998). Electrical and Mechanical Properties of Ethylene Propylene Diene Monomer-Chloroprene Rubber Blend Loaded with White and Black Fillers , Journal of Applied Polymer Science, 70: 2061-2061 .