Viologen elastomers

The reason why I take up these polymers in this review is that (1) CB-BR is a cure type solid rubber carrying OH groups and Cl atoms as active species besides double bonds, (2) viologen elastomers are thermoplastic elastomers (TPE) derived from liquid rubber, indicating some characteristic behaviors, i.e., high tensile properties and special functions, and (3) ABA type liquid crystalline elastomers are also new TPE at room temperature, but behave as liquid rubber at high temperature. [Pg.269]

The ionene-type viologen elastomers having poly(butadiene-co-acrylonitrile) (NBV) were obtained by the reaction of a, a -dichloro-p-xylenc (DCX), A, A -bipyridine (BP) and dimethylamine-terminated liquid nitrile rubber (AT-NBR). The tensile properties of these elastomers were found to depend upon the number of cation-site in a structural unit of the ionene, and to attain A6 MPa in tensile strength and 3A0% in elongation at break without any reinforcement and vulcanization. [Pg.270]

High performance and novel functionality in diene or olefin rubber could be obtained by various chemical reactions through suitable functional groups attached to their polymeric chains. Along our studies, this review describes 1-chioro-1,3-butadiene—1,3-butadiene rubber (CB-BR), viologen elastomers and ABA type liquid crystalline elastomers. ... [Pg.270]

Lately, we obtained the ionene-type viologen elastomer having poly-(butadiene-co acrylonitrile) by the reaction of a,a -dichloro-p-xylene (DCX), 4,4 -bipyridine (BP) and dimethy1amine-terminated liquid nitrile rubber (AT-NBR). We synthesized three sorts of NBV (m=l, 2 and 3) by using variable quantities of AT-NBR, DCX and BP as well as NBR ionene, NBI (m=0 in NBV). [Pg.275]

In conclusion, viologen elastomers derived from the reaction of telechelic liquid rubber with viologen moiety have high tensile properties and thermoplastic elastomeric properties. Further exj)crime 11 ts on functionalizations of NBV are being carried out. [Pg.275]

T. Hasimoto, S. Kohjiya, S. Yamashita, and M. Me, Photochromic and photochemical ionene elastomer containing poly(tetrahydrofuran) segments and viologen units. J. Polym. Sci., Polym. Chem. 29, 651-665 (1991). [Pg.57]

We have reported the synthesis and properties of an ionene-type elastomer consisting of poly(oxytetramethylene ) units and viologen... [Pg.274]

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