Advanced biobased and rigid foams, based on urethane-modified isocyanurate from oxypropylated gambier tannin polyol. (October 2016)

• Record Type: Journal Article
• Authors: Arbenz, Alice; Frache, Alberto; Cuttica, Fabio; Avérous, Luc
• Is Part Of: Polymer degradation and stability. Volume 132(2016:Oct.)
• Page Start: 62
• Page End: 68
• Publication Date: 2016-10
• Subjects: Tannin -- Oxypropylation -- Urethane-modified isocyanurate -- Foam; λ thermal conductivity -- DMCHA N, N-dimethylcyclohexylamine -- EHC Effective Heat of Combustion -- HOMO homopolymers -- HRR Heat Release Rate -- IOH Hydroxyl index -- OPG oxypropylated glycerol -- OPT tannin-based liquid polyol -- PHRR Peak of Heat Release Rate -- PIR polyisocyanurate -- PMDI 4, 4′-Methylenebis(phenyl isocyanate) -- PO propylene oxide -- PPO polypropylene oxide chains -- Pr residual weight percentage -- PUIR urethane-modified isocyanurate -- PUR polyurethane -- tig ignition time -- SEC Size Exclusion Chromatography -- st.dev standard deviation -- THR Total Heat Released value -- TSR Total Smoke Release; Polymers -- Deterioration -- Periodicals; Stabilizing agents -- Periodicals; Polymères -- Dégradation -- Périodiques; Stabilisants -- Périodiques; 668.9
• DOI: 10.1016/j.polymdegradstab.2016.03.035
• Languages: English
• ISSNs: 0141-3910

Abstract

Abstract: Rigid and biobased urethane-modified isocyanurate (PUIR) foams with an isocyanate/hydroxyl molar ratio equal to 3, were synthesized from glycerol-based and/or gambier tannin-based polyols, obtained by oxypropylation process. The content of each polyol was varied progressively and respectively from 0 to 100%. The synthesized PUIR foams were fully characterized and compared. Density, compressive modulus, thermal conductivity and closed-cell content were studied. Cell morphology was also observed by scanning electron microscopy. Furthermore, thermal stability and flammability were investigated to study the impact of the aromatic structure provided by the tannins. The results show that the tannin-based polyol favors some PUIR foams properties such as fire retardancy and high compressive strength behavior.