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Poly tert-butylacetylene

Monosubstituted acetylenes generally prefer cyclotrimerization to polymerization in the presence of halides of Group 5 metals as described earlier (135-137). Tbe polymerization of monosubstituted acetylenes by NbCls and TaCls catalysts is possible only in the case of sterically crowded monomers, which is exemplified by the polymerization of 3-trialkylsilyl-l-alkynes with the formula of HC CH(Si(CH3)2R)R (R = CHg, n-CeUis, CgHs R = ra-CgHT, n-C5H11, ra-CyHis) (45). Even tert-butylacetylene affords a low yield of polymer in the presence of TaCls or NbCls. Additionally, the molecular weights of these Ta- and Nb-based poly(tert-butylacetylene)s are lower than those of the W-based ones. However, there has been a demonstration of the imique ability of... [Pg.11]

Poly(phenylacetylene), poly(butylacetylene), poly(tert-butyl acetylene), poly(4- H Polymerization mechanism 15... [Pg.454]

See other pages where Poly tert-butylacetylene is mentioned: [Pg.147]    [Pg.361]    [Pg.23]    [Pg.553]    [Pg.560]    [Pg.128]    [Pg.662]    [Pg.886]    [Pg.1811]    [Pg.147]    [Pg.361]    [Pg.23]    [Pg.553]    [Pg.560]    [Pg.128]    [Pg.662]    [Pg.886]    [Pg.1811]   
See also in sourсe #XX -- [ Pg.649 ]



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Butylacetylene

Tert-Butylacetylene

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