Acylamido-based anion-functionalized ionic liquids for efficient synthesis of poly(isosorbide carbonate)

Abstract

Using biomass and renewable feedstocks to prepare high value-added products instead of conventional petrochemicals has received extensive attentions recently. In this work, a facile and phosgene-free approach to synthesize bio-based...

Sustainable valorisation of renewables through dialkyl carbonates and isopropenyl esters

“…144 Recently, Luo, Xu and co-workers evaluated the activity of several different acylamido-based tetrabutylphosphonium ILs, characterised by low anion–cation interaction as ISB/DMC transesterification/polycondensation catalysts: tetrabutylphosphonium phthalimide, [P 4444 ][Pthth] (entry 7, Table 3) was the most active PIL in terms of activity (ISB conversion up to 99.6%) and DMC carboxymethylation selectivity (99.0%). 145 Remarkable improvements in terms of PIC M w and T g were observed when employing diphenyl carbonate (DPC) instead of DMC in the presence of trace amounts (1.5–4.5 × 10 −2 mol%) of an imidazolium-based gemini IL catalyst, bis-(3-methyl-1-imidazolium)ethylene dibromide, [C 2 (C 1 im) 2 ][Br] 2 (entry 8, Table 3) obtaining PIC samples with M w as high as 97.8 × 10 3 g mol −1 . 146 Deep eutectic solvents (DESs) were also effective catalysts for the synthesis of high M w PIC from ISB and DPC.…”

Crystallization and molecular mobility in renewable semicrystalline copolymers based on polycaprolactone and polyisosorbide

“…33,34 Isosorbide is a V-shaped diol that carries two sterically different secondary hydroxyl groups, with the so-called 'exo-' and 'endo-' configurations, respectively, and two 'cis-' connected tetrahydrofuran rings. 35,36 It is a commercially available biobased monomer, produced from D-glucose (on the industrial scale) or starch. 36 This non-toxic chiral diol has been employed for the stepwise development of various polymers, including polyesters, polyurethanes, polyamides, polycarbonates, etc.…”

“…35,36 It is a commercially available biobased monomer, produced from D-glucose (on the industrial scale) or starch. 36 This non-toxic chiral diol has been employed for the stepwise development of various polymers, including polyesters, polyurethanes, polyamides, polycarbonates, etc. [37][38][39][40] In the context of the present study, we will discuss poly(isosorbide), PIS, which is an isosorbide-based poly(acetal).…”

“…36 Isosorbide is a V-shaped diol that carries two sterically different secondary hydroxyl groups, with the so-called 'exo-' and 'endo-' configurations, respectively, and two 'cis-' connected tetrahydrofuran rings. 35,36 This non-toxic chiral diol has been employed within various synthetic processes for the step-development of various polymers, including polyesters, polyurethanes, polyamides, polycarbonates, etc. 35,[38][39][40] Herein, PIS of relatively small molar mass (short length) was used, via its hydroxyl groups (-OH), as a macro-initiator for the ROP of e-caprolactone, yielding copolymers with PIS and PCL blocks.…”

“…36 Isosorbide is a V-shaped diol that carries two sterically different secondary hydroxyl groups, with the so-called ‘ exo -’ and ‘ endo -’ configurations, respectively, and two ‘ cis -’ connected tetrahydrofuran rings. 35,36 This non-toxic chiral diol has been employed within various synthetic processes for the step-development of various polymers, including polyesters, polyurethanes, polyamides, polycarbonates, etc. 35,38–40…”