Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization.

ABSTRACT: Bio-polyols (BPOs), characterized by a hydroxyl number up to around 90 mg KOH/g, narrow polydispersity index and relatively low molecular mass up to 2000 g/mol, were synthetized from partially and completely epoxidized soybean and linseed oils and caprylic acid or 3-phenyl butyric acid. These BPOs were used in the presence of toluene diisocyanate to produce polyurethane (PU) foams by using a quasi-prepolymer method involving a two-step reaction. A detailed structural investigation of the prepolymers from toluene diisocyanate and both BPOs and polypropylene glycol was conducted by SEC and solution NMR. The apparent density of the foams was in the range of 40-90 kg/m³, with higher values for foams from the aromatic acid. All the foams showed an open-cell structure with uniform and

SUBMITTER: Losio S 

PROVIDER: S-EPMC10675359 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature