AB type polyaddition route to thermoplastic polyurethanes from fatty acid derivatives
CRAMAIL, Henri
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
< Leer menos
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Idioma
en
Article de revue
Este ítem está publicado en
Polymer Chemistry. 2012, vol. 3, n° 6, p. 1594-1605
Royal Society of Chemistry - RSC
Resumen en inglés
Naturally occurring oleic acid and undecylenic acid derivatives were successfully utilized to synthesize a series of new semi-crystalline polyurethanes via the AB-type polycondensation approach. A set of four novel AB-type ...Leer más >
Naturally occurring oleic acid and undecylenic acid derivatives were successfully utilized to synthesize a series of new semi-crystalline polyurethanes via the AB-type polycondensation approach. A set of four novel AB-type monomers was prepared via the use of environmentally benign thiol-ene chemistry. These AB-type monomers were self-polycondensed (with or without catalyst) in two ways: (a) the hydroxyl-acyl azide approach and (b) the melt transurethane method in order to obtain reasonably high molar mass polyurethanes. The resulting polymers were thoroughly characterized by NMR, SEC, DSC, TGA and MALDI-TOF mass spectroscopy. The MALDI-TOF analysis confirmed the formation of linear polyurethanes with a trace amount of macrocycles. All the polyurethanes exhibited fair thermal stability with no significant weight loss below 200 degrees C. The polyurethanes based on undecylenic acid as a monomer displayed a thermoplastic behavior with well-identified melting transitions. Further, DSC analysis revealed that polyurethanes prepared from undecylenic acid by different methods showed different glass and melting transitions. Two glass transition temperatures due to soft and hard segments were observed for polyurethanes synthesized from oleic acid derivatives, indicating a phase-separated morphology.< Leer menos
Palabras clave en inglés
CANOLA OIL
PLANT OILS
SOYBEAN OIL
CHEMICAL-INDUSTRY
OIL-BASED POLYURETHANES
CASTOR-OIL
RENEWABLE RESOURCES
PHYSICAL-PROPERTIES
VEGETABLE-OILS
THERMAL-PROPERTIES
Orígen
Importado de HalCentros de investigación