Modification of ricinoleic acid based nonisocyanate polyurethane using polyamine containing polyhedral oligomeric silsesquioxane

Biomass-based polymers and their property regulation using functional materials have attracted much interest. In this work, ricinoleic acid-derived cyclic carbonate was prepared and applied to the synthesis of nonisocyanate polyurethane (NIPU) with aliphatic diamine, in which octa(aminopropyl) polyhedral oligomeric silsesquioxane (OAP-POSS) was incorporated as poly-amine to partially or totally substitutes for the diamine to introduce POSS units into the polymer thus regulating the properties of the resultant material. In the curing process, Fourier transform infrared spectroscopy (FT-IR) was used to track the reaction and curing at 50 degrees C for 12 h was found to be suffi-cient for the polymerization. A series of POSS modified NIPUs were obtained by altering the molar fraction of OAP-POSS in total amine components and the material with the highest thermal stability, shore hardness and water resistance was accessed with 100% substitution of OAP-POSS for diamine.

Automated summary

Biomass-based polymers have attracted significant attention due to their ability to be regulated using functional materials. This study focused on the synthesis of nonisocyanate polyurethane (NIPU) using ricinoleic acid-derived cyclic carbonate and aliphatic diamine, with the incorporation of octa(aminopropyl) polyhedral oligomeric silsesquioxane (OAP-POSS) as a poly-amine for introducing POSS units and regulating the properties of the material. The curing process was monitored using Fourier transform infrared spectroscopy, and it was found that a curing time of 12 hours at 50 degrees Celsius was sufficient for polymerization. Different NIPUs modified with various molar fractions of OAP-POSS were obtained, and the material with 100% substitution of OAP-POSS for diamine showed the highest thermal stability, shore hardness, and water resistance.