Erythritol Dicarbonate as Intermediate for Solvent- and Isocyanate-Free Tailoring of Bio-Based Polyhydroxyurethane Thermoplastics and Thermoplastic Elastomers
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DOI: 10.1021/acs.macromol.6b02787
Abstract: The highly reactive [4,4′-bi(1,3-dioxolane)]-2,2′-dione (BDC), also being referred to as erythritol dicarbonate and butadiene dicarbonate, enables the facile isocyanate-free tailoring and melt-processing of bio-based polyhydroxyurethane (PHU) materials. Both the direct carbonation of erythritol and the… read more here.
Keywords: erythritol dicarbonate; based polyhydroxyurethane; isocyanate free; free tailoring ... See more keywords
Synthesis and characterization of isocyanate-free polyureas
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DOI: 10.1039/c7gc02996a
Abstract: Due to continued health and safety concerns surrounding isocyanates, alternative synthetic routes to obtain urea-containing polymers is gaining much attention. Melt polycondensation of urea with diamines achieved polyureas in the absence of catalyst or solvents.… read more here.
Keywords: free polyureas; chemistry; characterization isocyanate; isocyanate free ... See more keywords
Biodegradable isocyanate-free polyurethane films via a noncatalytic route: facile modified polycaprolactone triol and biobased diamine as precursors
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DOI: 10.1039/d2ra05710g
Abstract: A facile synthesis of isocyanate free polyurethanes (PU) was executed by the reaction of biodegradable cyclic carbonate and sustainable diamines generated via chemical modification. The biodegradable polyol polycaprolactone triol (PCL) was transformed into a new… read more here.
Keywords: spectroscopy; isocyanate free; polycaprolactone triol; diamine precursors ... See more keywords
Comparative analysis of two isocyanate-free urethane-based gels for antifouling applications
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DOI: 10.1080/08927014.2020.1870679
Abstract: Abstract Amphiphilic gels consisting of acrylamide (AAM)/2-hydroxyethyl methacrylate (HEMA), hexafluorobutyl methacrylate (HFBMA) and non-isocyanate urethane dimethacrylate (NIUDMA) of varying molecular weights were compared. A three-level Taguchi analysis was performed using the amount of AAM/HEMA, HFBMA,… read more here.
Keywords: comparative analysis; two isocyanate; analysis; urethane ... See more keywords