Introduction to farnesene-based polyols / Herbert Chao in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 25, N° 4 (04/2018)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 25, N° 4 (04/2018) . - p. 21-27 Titre : Introduction to farnesene-based polyols Type de document : texte imprimé Auteurs : Herbert Chao, Auteur ; Steve Henning, Auteur ; Nan Tian, Auteur ; Tomas Tmka, Auteur Année de publication : 2018 Article en page(s) : p. 21-27 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Hydrophobie Polyaddition Polyfarnesène Polymères -- Synthèse Polyols Polyuréthanes Rhéologie Index. décimale : 668.3 Adhésifs et produits semblables Résumé : A new hydrophobic polyol derived from a renewable source offers lower viscosity than hydroxyl-terminated polybutadienes (HTPBs) of the same molecular weight. Hydroxyl-terminated polybutadiene (HTPB) resins are known to have a higher viscosity than polyether polyols of the same molecular weight. A new hydrophobic polyol derived from renewable resources, namely polyfarnesene diol, has been developed having lower viscosity than the HTPBs of the same molecular weight.Hydroxyl-terminated polybutadiene (HTPB) resins are known to have a higher viscosity than polyether polyols of the same molecular weight. A new hydrophobic polyol derived from renewable resources, namely polyfarnesene diol, has been developed having lower viscosity than the HTPBs of the same molecular weight. Trans-b-farnesene* was used in the present study for the anionic processes (farnesol and other oxygenated byproducts removed). Trans-b-farnesene is produced in small quantities in natural processes, but typically both a- and b-isomers are present. The supplier has modified the common yeast Saccharomyces cerevisiae to efficiently produce large amounts of trans-b- farnesene. Sugar is fermented to the target molecule in a manufacturing-ready strain that used 21 enzymatic steps in a native pathway. Only the b-isomer is active in polymerization, making this fermentation route especially attractive industrially. This article summarizes the preparation of polyols based on trans-b-farnesene via anionic polymerization. Polyurethanes derived from polyfarnesene diol (PFD), poly(farnesene-co-butadiene) diol, and polyol blends of polyfarnesene diol and hydroxyl-terminated polybutadiene are evaluated and compared. Note de contenu : - ANIONIC POLYMERIZATION - POLYURETHANE SYNTHESIS - RESULTS AND DISCUSSION : Miscibility of polyfarnesene diols with other polyols - Polyurethanes derived from polyol mixture containing diols - POlyurethanes derived from copolymer diols based on different ratios of farnesene and butaniene - Polyurethane derivef rom th epolyol mixture conatining polyfarnesene diol and poly bd polyol - Viscosity of polyol blends and copolymer polyols - FIGURE : Viscosity of polyol blends and polyols of copolymers made from farnesene and butadiene in various ratios - TABLES : 1. Compatibility results of polyfarnesene diol and hydrogenated polyfarnesene diol - 2. Polyurethanes of 30% hard segment content derived from polyol blends of PFD 2000 and Krasol LBH 2000 resin - 3. Polyurethanes of 40% hard segment content derived from polyol blends of PFD 2000 and Krasol LBH 2000 resin - 4. Polyurethanes of 30 % hard segment content derived from polyols based on farnesene and butadiene random copolymers - 5. Polyurethanes of 40 % hard segment content derived from polyolss based on farnesene and butadiene random copolymers - 6. Polyurethanes of 30 % hard segment content derived from polol blends of PFD 2000 and poly bd R45HTLO resin - 7. Polyurethanes of 40 % hard segment content derived from poloyl blends of PFD 2000 and poly bd R45HTLO resin - 8. Polyurethanes of 30 % hard segment content derived from poloyl blends of PFD 2000 and poly bd R20LM resin - Polyurethanes of 40 % hard segment content derived from poloyl blends of PFD 2000 and poly bd R20LM resin - TABLES : En ligne : https://www.adhesivesmag.com/articles/96166-introduction-to-farnesene-based-poly [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30632 [article]

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