Abstract
Blends of highly incompatible elastomers may sometimes be improved by the addition of small amounts of another polymer. Setua and White [1] applied this technique to improve the homogeneity of binary and ternary blends of CR, NBR and EPM. When a small amount of chlorinated polyethylene is added to NBR/EPM or CR/EPDM blends, they mix more rapidly. The chlorinated polyethylene acts as a compatibilizing agent which appears to form a skin on the EPM particles that helps the larger NBR chunks adhere to them. This increased adhesion and polarity at the EPDM surface increases the compatibility. The presence of block or graft copolymers can also alleviate blending of incompatible elastomers as they can alter interfacial properties [2–6]. Ideally the block or graft component should contain a segment which is chemically identical to one of those in the respective phases, but the desired effect may still be achieved if one polymer of the graft is miscible with, or adhered to, one of the phases.
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References
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© 1998 Springer Science+Business Media Dordrecht
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de Silva, K.G.K., Lewan, M.V. (1998). Improving the morphology and properties of NR/NBR blends with NR/PMMA graft copolymers. In: Tinker, A.J., Jones, K.P. (eds) Blends of Natural Rubber. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4922-8_6
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DOI: https://doi.org/10.1007/978-94-011-4922-8_6
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