Synthesis of diethylene glycol-based aliphatic polyester polyol and effect of glycerin crosslinker on its properties

This study describes the results of investigations into the effects of the makeup of aliphatic polyester polyol synthesized by mixing adipic acid with the variable quantities of glycerin (GLY) is a cross-linker upon the mechanical parameters of polyurethane (PU) polymer. Polyurethane (PU) polymer is a thermoplastic polymer that is used to make foams for seats etc. Aliphatic polyester polyols are produced through the esterification of acids, an appropriate catalyst, and glycerin (GLY); whereas a polyurethane polyol is made through the pre-polymerization of (aliphatic polyester) polyol with pure prepolymer, i.e., methylene diphenyl diisocyanate (MDI), and subsequent polymerization of the polyol with prepolymer Shore A hardness and other mechanical attributes of polyurethane are investigated via shore A testing for hardness. Along with this, apparent density was determined using the (American Society for Testing and Materials) ASTM D1622-08 method, as well as resistance against abrasion was determined using a DIN abrasion wear resistance tester. Fourier-transform infrared spectroscopy (FTIR) examination is employed to analyze the structural features of the sample. The findings suggest that the shoreline increased hardness of the PU is associated with an increase in GLY concentrations, which ranges from 4 to 12 g. In spite of this, the PU density shows a decrease with an increase in crosslinker content. The abrasion wears resistance of polyurethane, on the other hand, increases as the concentration of GLY in the polyurethane increases. The presence of specific peaks in the FTIR spectrum supports the creation of polyurethane, according to the results of a structural investigation.