Silsesquioxane polymer

Patent Granted Many polymeric forms of silsesquioxanes have been developed with varying molecular weights and synthesis methods. The first high molecular weight tractable polymeric silsesquioxane was a ladder type repeating unit, seen in Figure 3, polyphenylsilsequioxane, reported by Brown et al. in 1960.[9] Brown’s findings were used as a basis for further research and synthesis variations by plethora of additional research groups investigating polyphenylsilsequioxanes.