TY - JOUR
T1 - Effect of H12MDI isomer composition on mechanical and physico-chemical properties of polyurethanes based on amorphous and semicrystalline soft segments
AU - Saralegi, Ainara
AU - Etxeberria, Agustin
AU - Fernández-D'Arlas, Borja
AU - Mondragon, Iñaki
AU - Eceiza, Arantxa
AU - Corcuera, M. Angeles
PY - 2013/8
Y1 - 2013/8
N2 - Two series of segmented thermoplastic polyurethanes were synthesized having 33 wt % hard segment based on 4,4′-dicyclohexyl methane diisocyanate with different trans-trans isomer contents and 1,3-propanediol chain extender. The soft segments were based on poly(hexamethylene-pentamethylene carbonate)diol and poly(butylene sebacate)diol, amorphous and semicrystalline polyol, respectively. 4,4′-Dicyclohexyl methane diisocyanate with different trans-trans isomer contents were obtained by fractional crystallization of commercial diisocyanate and were characterized by differential scanning calorimetry and nuclear magnetic resonance spectroscopy. 4,4′-Dicyclohexyl methane diisocyanate trans-trans isomer lead to some interesting properties in the synthesized polyurethanes, due to the more ordered hard domains formed by packing of trans-trans 4,4′-dicyclohexyl methane diisocyanate. Thereby, as 4,4′-dicyclohexyl methane diisocyanate trans-trans isomer content increased, a better phase separated structure was observed.
AB - Two series of segmented thermoplastic polyurethanes were synthesized having 33 wt % hard segment based on 4,4′-dicyclohexyl methane diisocyanate with different trans-trans isomer contents and 1,3-propanediol chain extender. The soft segments were based on poly(hexamethylene-pentamethylene carbonate)diol and poly(butylene sebacate)diol, amorphous and semicrystalline polyol, respectively. 4,4′-Dicyclohexyl methane diisocyanate with different trans-trans isomer contents were obtained by fractional crystallization of commercial diisocyanate and were characterized by differential scanning calorimetry and nuclear magnetic resonance spectroscopy. 4,4′-Dicyclohexyl methane diisocyanate trans-trans isomer lead to some interesting properties in the synthesized polyurethanes, due to the more ordered hard domains formed by packing of trans-trans 4,4′-dicyclohexyl methane diisocyanate. Thereby, as 4,4′-dicyclohexyl methane diisocyanate trans-trans isomer content increased, a better phase separated structure was observed.
KW - 4,4′-Dicyclohexyl methane diisocyanate
KW - Biocompatible polymer
KW - Crystallinity
KW - Geometrical isomer
KW - Phase separation
UR - https://www.scopus.com/pages/publications/84880842613
U2 - 10.1007/s00289-013-0930-3
DO - 10.1007/s00289-013-0930-3
M3 - Article
AN - SCOPUS:84880842613
SN - 0170-0839
VL - 70
SP - 2193
EP - 2210
JO - Polymer Bulletin
JF - Polymer Bulletin
IS - 8
ER -