95491-58-0Relevant academic research and scientific papers
Solid-state NMR studies on the orthorhombic-to-hexagonal phase transition for α,ω-alkanediol crystals
Kuwabara,Horii,Ogawa
, p. 55 - 64 (2001)
Studies on the orthorhombic and hexagonal phases of α,ω-alkanediols have been performed by solid-state NMR. In the crosspolarization/magic angle spinning 13C NMR spectrum for the orthorhombic phase of 1,23-tricosanediol (HO-(CH2)sub
POLYMERS MADE OF RENEWABLE RESOURCES
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Page/Page column, (2013/03/26)
Polycondensates with long-chain linear methylene sequences, their production, a method for producing linear odd-numbered C>20 α,ω-dicarboxylic acids and derivatives thereof and applications of the polycondensates are described.
Long-chain linear C19 and C23 monomers and polycondensates from unsaturated fatty acid esters
Stempfle, Florian,Quinzler, Dorothee,Heckler, Ilona,Mecking, Stefan
, p. 4159 - 4166 (2012/05/04)
Isomerizing alkoxycarbonylation of methyl oleate and ethyl erucate, respectively, yielded dimethyl 1,19-nonadecanedioate and diethyl 1,23-tricosanedioate in >99% purity. With [κ2-(P P)Pd(OTf)][OTf] as a defined catalyst precursor (PP = 1,2-bis[(di-tert- butylphosphino)methyl]benzene) the reaction can be carried out without the need for additional added diphosphine. Saponification of the diesters yielded 1,19-nonadecanedicarboxylic acid and 1,23-tricosanedicarboxylic acid in >99% purity. By ruthenium-catalyzed reduction of the diesters with H2, 1,19-nonadecanediole and 1,23-tricosanediole were formed in high yield and purity (>99%). From the latter, 1,19-nonadecanediamine and 1,23-tricosanediamine were generated. Polyesters with commercially available shorter-chain petrochemical or renewable diols exhibit high melting points due to the crystallizable long-chain methylene segments from the dicarboxylic acid component, e.g., poly[1,6-hexadiyl-1,23-tricosanedioate] Tm 92, Tc 75 °C. Thermal properties of novel long-chain polyamides are reported.
Linear semicrystalline polyesters from fatty acids by complete feedstock molecule utilization
Quinzler, Dorothee,Mecking, Stefan
supporting information; experimental part, p. 4306 - 4308 (2010/08/06)
(Figure Presented) Complete and linear incorporation of fatty acids into polyesters is achieved by isomerizing carbonylation to give polymerization- quality diesters and their polycondensation with the corresponding diols obtained by reduction. The strictly linear and long-chain hydrocarbon nature of these polyesters results in a high degree of crystallinity and melting behavior akin to common thermoplastics.
