SYNTHESIS AND CHARACTERIZATION OF A NOVEL REACTIVE OLIGOMERIC LADDERLIKE COPOLYMETHYL-AMINOPROPYL SILSESQUIOXANE

摘要

A novel ordered reactive oligomeric ladderlike copolymethyl-aminopropylsilsesquioxane (Me-AP-T), was successfully synthesized by an efficient hydrosilylation graft reaction of 1,1,1-trimethyl-N-2-propenyl-silanamine with a reactive oligomeric ladderlike copolymethyl-hydrosilsesquioxane (Me-H-T), which was prepared by "supramolecular chemistry-dictated stepwise coupling polymerization" process. FT-IR, ~1H- and ~(29)Si-NMR spectra show that hydrosilylation reaction proceeds completely. Moreover, ~1H-NMR spectra also indicate that both the molar ratios of ≡SiMe group to Si—H and ≡SiMe group to ≡SiPrNH_2 are approximately 1:1 respectively based on the ratio of integrated resonance areas of the different groups. XRD analysis and ~(29)Si-NMR spectra are used for investigating the ladderlike structure of the polymers. A high T_g (128.38℃) of Me-AP-T shown in DSC measurement implies that the ordered reactive Me-AP-T macromolecules have much stiff chains.