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The renewable PUF was prepared by the alcoholysis of the used polyurethane foam composite and the polyurethane foam composite was also prepared by alkali lignin and renewable PUF. The renewable PUF was examined by GC-MS, the results showed the renewable PUF mainly consists of glycol, propanol and 1, 2-Benzenedicarboxylic acid, which can directly be used as the raw material of polyurethane foam composite. The dose of glycol impacts on the performances of renewable PUF, the viscosity of renewable PUF decreased with the increase of the dose glycol. The prepared polyurethane foam composite was also tested. Thermal stability as well as compression property was studied. It was obtained from the TG curve and the DTG curve that the initial decomposition temperatures of polyurethane foam composites with 10% renewable PUF and without renewable PUF were 286.75°C and300.63 °C, respectively, which showed the renewable PUF affected the thermal stability of the polyurethane foam composite. The compressive strength ( 10) was from 203kPa to 125 kPa, which were affected by the dose of renewable PUF.

Characterization of Renewable PUF and Preparation of Polyurethane Foam Composites with Alkali Lignin/Renewable PUF