Synthesis, Characterization and Properties of Soybean Oil-Based Polyurethane

Abstract

At present, the consumption of polyurethane is huge in various industries. As a result, it has become a research hotspot to use environmentally friendly and renewable bio-based raw materials (instead of petroleum-based raw materials) to prepare polyurethane. In this paper, epoxy soybean oil (ESO) was used as raw material, and polyethylene glycol (PEG-600) was used for ring opening. Fourier transform infrared (FT-IR) and proton nuclear magnetic resonance (1H NMR) analysis proved that soybean oil-based polyester polyols was prepared. Soybean oil-based polyurethane (SPU) was synthesized by the reaction of the soybean oil-based polyol with isophorone diisocyanate (IPDI), so as to save energy and protect the environment. The properties of SPU films were adjusted by changing the R value (the molar ration of -NCO/-OH) and the film forming temperature. The chemical structure and properties of the SPU were characterized by FTIR, 1H NMR, gel permeation chromatography (GPC), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The results show that the mechanical strength, water contact angle, microphase separation degree, barrier property, and thermal stability of SPU films gradually increase, while the transparency, oxygen permeability coefficient and moisture permeability coefficient of SPU films gradually decrease with the increase of R value and film forming temperature.

Advancements in polyurethane coating: Synthesis and characterization of a novel hyper branched polyester polyol

“…Various new methods have been developed for synthesizing different types of polyester polyols with unique structures. These include Jatropha-Oil-Based Polyester Polyol 33 , Polyester Polyol from Cyclohexanone plant wash water 34 , isosorbide-based polyester polyols 35 , polyester polyol from Direct conversion of waste polyesters 36 , polyester polyol based on epoxidized soybean oil 37 , and other works reported in the literature [38][39][40] . Recent investigations on polyurethane have revealed that vegetable oil fatty acids can serve as a suitable replacement for petroleum-based raw materials [41][42][43] .…”

Catalyst-Free Synthesis of Betulin-Based Polyurethane Elastomers with Outstanding Mechanical Properties and Solvent Resistance

“…For example, Badakhshanian and Ghaemy 5 synthesized a new PU elastomer based on tragacanth gum polysaccharide. Various types of vegetable oils have been used in the preparation of bio-based PUs, such as soybean oil, 6 canola oil, 7 and castor oil (CO). 8 Vegetable oil, whose main component is straight-chain fatty acid glycerides, 9 has been used as biomass polyols.…”

Accelerated Aging on the Compression Properties of a Green Polyurethane Foam: Experimental and Numerical Analysis

“…However, there is a lack of scientific publications regarding the lifespan of PUFs where their mechanical properties are relevant, such as sandwich panels [ 6 ]. Many studies regarding the synthesis, characterizations and applications of bio-based PUFs are being carried out every year due to its pairing characteristics with oil-based foams as well as its relative low cost and eco-friendly origin [ 7 , 8 , 9 , 10 ]. PUF is a two-phase material composed of a continuous polymer matrix and the gas in the discretely distributed cells.…”