| Abstract: | The influence of base type on polymerization and on polymer properties in the synthesis of polysilylalkylene(arylene)diamines by a modified interfacial system was investigated. The modified system utilizes 2,5-hexanedione or acetonitrile in place of the usual aqueous solvent. Protonation of both diamine and amine groups in the polymer chain is important when NaOH or diamine itself is employed as the base. Protonation is unimportant when triethylamine is used. In triethylamine systems the highest yield is formed with the silane containing the most electron-deficient silicon, and the highest molecular weight products are formed with the least sterically hindered silane. When NaOH or diamine itself is employed there is no apparent correlation between silane and amine electronic or steric nature and any of the measured polymer properties. As diamine solubility decreases, polymer yield increases. |
