Toward Fully Renewable Rigid Polyurethane Foams with Aliphatic Diisocyanates

Area of Science:

• Materials Science
• Polymer Chemistry
• Sustainable Development

Background:

• Minimizing industrial reliance on petroleum-derived monomers is crucial for sustainable plastic development.
• Aromatic diisocyanates are key components in polyurethanes (PUs) but pose sustainability challenges.
• Aliphatic diisocyanates offer a promising renewable alternative for monomer production.

Purpose of the Study:

• To systematically study and apply aliphatic diisocyanates for the preparation of rigid PU foams.
• To develop rigid polyurethane-polyisocyanurate foams with high renewable carbon content.
• To assess the properties and performance of these novel foams compared to commercial standards.

Main Methods:

• Incorporation of aliphatic 1,6-hexamethylene diisocyanate (6-HDI) with renewable polyols and cross-linkers.
• Synthesis of rigid polyurethane-polyisocyanurate foams.
• Morphological, thermal, and mechanical analyses of the synthesized foams.

Main Results:

• Novel rigid polyurethane-polyisocyanurate foams with high renewable carbon content were successfully prepared.
• The developed foams demonstrated morphological, thermal, and mechanical properties similar to commercial rigid foams.
• The study confirmed the viability of using aliphatic diisocyanates in rigid foam formulations.

Conclusions:

• The synthesis of rigid foams using aliphatic diisocyanates, avoiding aromatic counterparts, expands formulation possibilities.
• These renewable foams offer comparable performance to conventional PUs, supporting sustainable material development.
• This research advances the understanding and application of renewable materials in foam production.