Effect of Lignin Content as Bio‐Chain Extender in Polyurethane Foam

Abstract

Polyurethane is a polymer compound that consists of a hard segment and a soft segment. Further modifications of polyurethane make it possible to make foam products with a variety of properties. Polyurethane foam has a tendency to be rigid and flexible by adjusting the segment ratio and adding chain extenders during the synthesis process. The basic precursors used in this research on bio‐polyurethane foam are Polypropylene Glycol 2000, Toluene Diisocyanate 80, Amine catalyst, Tin catalyst, surfactant, and the addition of lignin biomass as a chain extender and as independent variables of this study with 1, 2, and 3 wt% variations with the synthesis method used is a one‐shot method. In attempt to investigate the effect of lignin chain extender addition to the macromolecular structures and morphology, FTIR and SEM are used, while the mechanical properties are analyzed using tensile machine. From the synthesis carried out, bio‐polyurethane foam with open pore shape is obtained. It has increased tensile strength, but the elongation tends to decrease with increasing lignin biomass addition.

A study on coconut fatty acid diethanolamide-based polyurethane foams

“…FTIR spectra were collected by a Nexus 470 FTIR spectrometer (Nicolet, USA) in attenuated total reflectance mode with a subscale of 4 cm −1 and 16 scans for each sample. 39 The heat resistance of the foam was determined by thermogravimetric analyzer (TGA). The percentage weight loss of the samples (5 ∼ 10 mg) was measured by TGA (Mettler, Switzerland) at a temperature range of 45 to 800 °C under a nitrogen atmosphere at a temperature rise rate of 10 °C min −1 .…”

Effect of Calcium Carbonate Content on the Mechanical and Thermal Properties of Chitosan-Coated Poly(urethane) Foams

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