The Synthesis of Silsesquioxanes and Their Applications in Polymerization

We synthesized a semi-closed clathrate silsesquioxane alkoxy - hydroxy phenyl ring of four siloxane ( T4 ) , and for the preparation of silicon oxy neodymium rare earth catalyst, initiator caprolactone (ε- CL) ring-opening polymerization . System of this article the amount of catalyst , n-butanol , the temperature, time, the influence of the solvent on the polymerization reaction and found that is able to initiate the reaction between -20 ° C to 70 ° C , and having the characteristics of part of the active polymerization NMR end group the structure obtained by ring-opening polymerization of the mechanism is \The optimum catalytic polymerization conditions of this catalyst system is: The catalyst solution was concentrated to a [Nd] = 0.144mol / L, [CL] / [Nd] = 1000,18 ℃, bulk polymerization, for 1 hour, the conversion rate of 92% , The viscosity-average molecular weight of about 10,000 . Article also phenyl trichlorosilane as raw materials gradually synthesized a series of clathrate silsesquioxane alkoxy : the the octaphenyl clathrate silsesquioxane alkoxy (OPS), eight nitrophenyl clathrate silsesquioxane alkoxy ( ONPS), eight - aminophenyl clathrate silsesquioxane the alkoxy ( OAPS ) , methacryloyl chloride of eight aminophenyl clathrate silsesquioxane alkoxy ( the OAPS - MAC ) , carboxylated Pat aminophenyl clathrate silicon times semi - siloxane (OAPS-AA), which made ??the structure OAPS-MAC, OAPS-AA OPS, ONPS, OAPS made ??structural characterization and performance analysis , and also to explore the the OPS the cage structure formation mechanism and OAPS application : characterization and analysis of the prospects for application in the field of polymer synthesis .