Biorenewable Oxypropylated Pentane-1,2,5-triol as a Source for Incorporation in Rigid Polyurethane Foams

Area of Science:

• Polymer Science
• Sustainable Chemistry
• Materials Science

Background:

• Polyurethane production heavily relies on petrochemical feedstocks.
• There is a growing demand for sustainable alternatives and renewable raw materials in polymer manufacturing.
• Developing bio-based polyols is crucial for the eco-friendly development of polyurethane foams.

Purpose of the Study:

• To synthesize and utilize biorenewable pentane-1,2,5-triol for rigid polyurethane foam preparation.
• To investigate the properties of rigid polyurethanes incorporating bio-based polyols.
• To assess the potential of lignocellulose-derived materials in high-performance polymer applications.

Main Methods:

• Achmatowicz rearrangement and hydrogenation-reduction of C5 alcohols to produce pentane-1,2,5-triol.
• Oxypropylation of the bio-based triol.
• Characterization of the bio-based polyol via NMR spectroscopy, hydroxyl number, and viscosity.
• Foam preparation with up to 30% biorenewable polyol.
• Evaluation of foam properties including compressive stress, thermogravimetry, dynamic mechanical analysis, and scanning electron microscopy.

Main Results:

• Successfully synthesized oxypropylated pentane-1,2,5-triol from biorenewable C5 alcohols.
• Incorporation of up to 30% bio-based polyol into rigid polyurethane foams.
• Achieved enhanced compressive strength exceeding 400.0 kPa.
• Observed comparable thermal degradation range (325-450 °C) and morphological properties to commercial polyurethanes.

Conclusions:

• Pentane-1,2,5-triol derived from lignocellulose is a viable bio-based alternative for rigid polyurethane foam production.
• The modified polyurethanes demonstrate competitive mechanical and thermal performance.
• This study highlights a promising pathway towards sustainable polyurethane materials.