NMR Characterization of a Hydrogenated Hydroxytelechelic Polyisoprene

Hydrogenated hydroxy-functionalized polyisoprene (H-HTPI) and isocyanurate of isophorone diisocyanates (I-IPDI): reaction kinetics study using FTIR spectroscopy

“…Primary alcohol groups present on H-HTPI chains according to previous NMR study [22]. respectively [22], and leads after hydrogenation to a colorless oligomer with primary alcohol groups at their chain ends [3]. According to NMR studies, authors have only evidenced the presence of primary alcohols correlated to the different hydrogenated isoprene units (Scheme 2).…”

“…Radically prepared low molecular weight hydroxylcapped polybutadiene (HTPB) and polyisoprene (HTPI) lead, after catalytic hydrogenation, to inert polyols, having a hydroxyl functionality greater than 2, which can be used to prepare high molecular weight polyurethanes [1][2][3]. The inertness of these soft segments contributes to enhance the solvent resistance, hydrolytic, oxidative, thermal and mechanical properties of the resulting segmented polyurethanes compared to the corresponding unsaturated homologues [1,[4][5][6][7].…”

The influence of isocyanurate content on the bioperformance of hydrocarbon-based polyurethanes

“…In addition, recent FT-IR studies have also shown that condensation reaction kinetic of H-HTPI with I-IPDI ( Fig. 1) which is mainly composed of IPDI triisocyanurate [45] could be easily predicted using a pseudosecond-order kinetic model taking into consideration the I-IPDI structure [46]. The resulting PU networks exhibit good mechanical properties and well-segregated microphase structures [47].…”

“…H-HTPI precursor structure contains 88% 1,4-, 6% 1,2-and 6% 3,4-isoprene units, respectively [44], and after hydrogenation leads to a colourless oligomer with primary alcohol groups at their chain ends [45]. NMR studies have evidenced the presence of primary alcohols correlated to the different hydrogenated isoprene units (Scheme 1).…”