Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization
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 w...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/22/4423 |
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| author | Simona Losio Angelica Cifarelli Adriano Vignali Simona Tomaselli Fabio Bertini |
| author_facet | Simona Losio Angelica Cifarelli Adriano Vignali Simona Tomaselli Fabio Bertini |
| author_sort | Simona Losio |
| collection | DOAJ |
| description | 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/m<sup>3</sup>, with higher values for foams from the aromatic acid. All the foams showed an open-cell structure with uniform and regular shape and uniform size. The specific Young’s moduli and compression deflection values suggest superior mechanical properties than the reference foams. The novel synthesized polyurethanes are excellent candidates to partially replace petroleum-based materials. |
| first_indexed | 2024-03-09T16:30:51Z |
| format | Article |
| id | doaj.art-dd9615c7789743f3934399ff30e5435e |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T16:30:51Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-dd9615c7789743f3934399ff30e5435e2023-11-24T15:02:34ZengMDPI AGPolymers2073-43602023-11-011522442310.3390/polym15224423Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and CharacterizationSimona Losio0Angelica Cifarelli1Adriano Vignali2Simona Tomaselli3Fabio Bertini4Institute for Chemical Sciences and Technologies “G. Natta” National Research Council, Via A. Corti 12, 20133 Milan, ItalyInstitute for Chemical Sciences and Technologies “G. Natta” National Research Council, Via A. Corti 12, 20133 Milan, ItalyInstitute for Chemical Sciences and Technologies “G. Natta” National Research Council, Via A. Corti 12, 20133 Milan, ItalyInstitute for Chemical Sciences and Technologies “G. Natta” National Research Council, Via A. Corti 12, 20133 Milan, ItalyInstitute for Chemical Sciences and Technologies “G. Natta” National Research Council, Via A. Corti 12, 20133 Milan, ItalyBio-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/m<sup>3</sup>, with higher values for foams from the aromatic acid. All the foams showed an open-cell structure with uniform and regular shape and uniform size. The specific Young’s moduli and compression deflection values suggest superior mechanical properties than the reference foams. The novel synthesized polyurethanes are excellent candidates to partially replace petroleum-based materials.https://www.mdpi.com/2073-4360/15/22/4423bio-polyolstoluene diisocyanate (TDI)flexible polyurethane foamsprepolymer synthesis and characterizationNMRthermal and mechanical properties |
| spellingShingle | Simona Losio Angelica Cifarelli Adriano Vignali Simona Tomaselli Fabio Bertini Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization Polymers bio-polyols toluene diisocyanate (TDI) flexible polyurethane foams prepolymer synthesis and characterization NMR thermal and mechanical properties |
| title | Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization |
| title_full | Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization |
| title_fullStr | Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization |
| title_full_unstemmed | Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization |
| title_short | Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization |
| title_sort | flexible polyurethane foams from bio based polyols prepolymer synthesis and characterization |
| topic | bio-polyols toluene diisocyanate (TDI) flexible polyurethane foams prepolymer synthesis and characterization NMR thermal and mechanical properties |
| url | https://www.mdpi.com/2073-4360/15/22/4423 |
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