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W.M. Rzymski


Modification and functionalization of elastomers


Polimery 1999, No 7-8, 505


DOI: dx.doi.org/10.14314/polimery.1999.505


Summary

Covering chemical modification and functionalization of elastomers as a rational method for making new polymeric materials endowed with unique chain structures and unusual properties, inaccessible by conventional homo- or copolymerization is reviewed. Plalogenation has been used for making CSM, CIIR and BUR. Epoxidation of NR with peracids in the latex phase exemplifies a chemical modification process used to make a special-purpose polar rubber from a nonpolar renewable bio-material. New developments in the homo- and hetero-catalyzed hydrogenation and in rubber hydrogenation in the latex phase have been offering new possibilities of preparing elastomers and thermoplastic elastomers. An example is the commercial production of NHBR, a hi-tech category elastomer, and hydrogenated triblock styrene-butadiene-styrene (FISBS) copolymers endowed with properties of thermoplastic elastomers. Both NHBR and HSBS exhibit a better thermal, aging and weather resistance than do their unmodified analogs. A specific chemical modification method involves chemically or mechanochemically initiated functionalization of elastomers, i.e., introduction of selected groups, e.g., carboxy, amide, or urazole groups, into elastomers to make block polymers or products endowed with properties of thermoplastic copolymers.


Keywords: elastomers, chemical modification, functionalization, hydrogenation, halogenation, epoxidation


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