Molecular Design,Synthesis And Characterization Of Linear Polymers Based On Bifunctional Cage Silsesquioxanes

Introduction of inorganic or organometallic segments into polymer system to prepare new hybrid materials has become a trend in the development of new materials.The organic-inorganic hybrid materials can display excellent and comprehensive properties via the synergism of organic and inorganic components.Polyhedral oligomeric silsesquioxane(POSS)is a very interesting monomer module,which are derived from hydrolysis and condensation of trifunctional organosilanes.The cage skeleton is connected by-Si-O-Si-and each silicon atom can connect with reactive groups.Therefore,it can be functionalized by chemical modification to achieve different molecular design goals.It is precisely because of this excellent molecular designability,POSS has received sustained attention in the field of new hybrid materials.In this paper,we focus on the subject of linear organic-inorganic hybrid polymer materials containing POSS structure in the main chain.Bifunctional POSS monomer as the core and OvPOSS as a starting point,we have synthesized two new bifunctional POSS monomers by combining the characteristics of click chemistry and metrology chemistry and dicarboxylic acid POSS and dihydroxy POSS respectively.Further,depending on the difference between the two monomer reactive functional groups,by polymerization with different small molecule organic monomers(1,6-hexamethylenediamine,hexamethylene diisocyanate,L-lactide),we have designed and successfully synthesized three new organic-inorganic hybrid polymers with POSS structure in the main chain.Finally,the relative performance of each material was tested and studied.