Alkoxysilane functionalized poly(butadiene-co-styrene) elastomers were prepared by terminating the anionic polymerization with tetraethylorthosilicate (TEOS). The isolated product contained 60 % to 70 % coupled polymer. A facile method for characterizing the type of coupling was developed using tetrabutylammonium fluoride as the decoupling agent. Analysis showed > 95 % of the coupled product was from condensation of the alkoxysilane endgroups during workup and only 3 % was due to two polymeric lithium chains reacting with one TEOS molecule. The alkoxysilane functionalized elastomers continued to increase in viscosity with storage. Neutralization of the polymer solution with 2-ethylhexanoic acid or addition of sterically hindered alcohols was able to reduce the coupling and viscosity increase. The alkoxysilane functionalized polymer improved hysteresis and wear compared to a similar non-functional polymer in silica containing tire tread applications.


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    Titel :

    The role of functional polymers in improving tire performance


    Beteiligte:


    Erscheinungsdatum :

    2009


    Format / Umfang :

    13 Seiten, 3 Bilder, 3 Tabellen, 37 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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