Isocyanate-free fabrication of sustainable polyurethane/POSS hybrid materials with tunable thermo-mechanical response

This work reports on the synthesis of non-isocyanate polyurethanes (NIPUs) obtained via the polyaddition of diamines: dimer fatty acid-derived diamine (DFA diamine) or polyether diamine (PPO diamine) with five-membered tri(cyclic carbonate) by a pre-polymerization method. The obtained NIPUs were fur...

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Bibliographic Details
Published in:Express polymer letters 2024, Vol.18 (1), p.2-26
Main Authors: Stachak, Piotr, Łukaszewska, Izabela, Ozimek, Jan, Raftopoulos, Konstantinos Nikolaou, Bukowczan, Artur, Hebda, Edyta, Bujalance Calduch, Carlos, Pielichowski, Krzysztof
Format: Article
Language:English
Subjects:
Biocompatibility
Carbon dioxide
Composite materials
Diamines
Dielectric properties
dynamic mechanical analysis
Fatty acids
Fourier transforms
Green chemistry
Heat resistance
Hydrogen bonds
Isocyanates
Mechanical analysis
Mechanical properties
Nanocomposites
nanoparticle
NMR
Nuclear magnetic resonance
Polyhedral oligomeric silsesquioxane
Polymerization
Polymers
Polyurethane
polyurethane matrix
Polyurethane resins
prepolymer
Scanning electron microscopy
Thermomechanical properties
Toxicity
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Summary:This work reports on the synthesis of non-isocyanate polyurethanes (NIPUs) obtained via the polyaddition of diamines: dimer fatty acid-derived diamine (DFA diamine) or polyether diamine (PPO diamine) with five-membered tri(cyclic carbonate) by a pre-polymerization method. The obtained NIPUs were further chemically modified by polyhedral oligomeric silsesquioxane (POSS) - glycidylisobutyl POSS (lepPOSS). The resulting reinforced composites, containing 5,10 or 15 wt% lepPOSS, were characterized in tenns of their structure (FTIR, NMR, XRD), micro structure (SEM-EDS) and thermo-mechanical properties (DMA). FTIR confinned the fonnation of polyurethanes, and NMR proved the chemical incorporation of lepPOSS. XRD and SEM-EDS showed a unifonn distribution of lepPOSS in the matrix for low lepPOSS concentration, with some agglomeration effects depending on the concentration of lepPOSS. DMA indicated mechanical reinforcement of NIPUs based on DFA diamine. For NIPUs synthesized with PPO diamine, the composite with the highest lepPOSS loading (15 wt%) exhibited superior mechanical properties in comparison to the pristine matrix, confinned by both DMA and static stretching test.
ISSN:1788-618X
1788-618X
DOI:10.3144/expresspolymlett.2024.2