Functional thermoplastics from linear diols and diisocyanates produced entirely from renewable lipid sources.
An unsaturated terminal diol, 1,18-octadec-9-endiol (ODEDO), and a saturated terminal diol, 1,9-nonanediol (NDO), were synthesized from oleic acid. The feasibility of utilizing these new diols for the production of thermoplastic polyurethanes (TPUs) was demonstrated by reacting them with a fatty acid-derived diisocyanate, 1,7-heptamethylene diisocyanate (HPMDI), and a commercially available petroleum-derived diisocyanate, 1,6-hexamethylene diisocyanate (HDI). One type of phase structure was obtained for both TPUs in this study, owing to the similarity between the ODEDO and NDO molecular structure. In addition, double yielding behavior (observed for the first time in polyurethanes) was observed in the stress-strain curves for both TPU systems. Compared to the TPUs prepared from HDI, the totally biobased TPUs (ODEDO-NDO-HPDMI) demonstrated comparable properties within acceptable tolerances, considering the impacts on physical properties due to the odd-even effect introduced by the HPDMI. This work is the first that establishes the production of linear thermoplastic polyurethanes entirely from lipid feedstock.
Trent Biomaterials Research Program, Departments of Physics and Astronomy and Chemistry, Trent University, Peterborough, Ontario, K9J 7B8, Canada.
Leila
L
Hojabri
Xiaohua
X
Kong
Suresh S
SS
Narine
D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry*; D003485:Cyanates / Q000737:chemistry*; D006018:Glycols / Q000737:chemistry*; D017953:Isocyanates; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009829:Oleic Acids / Q000737:chemistry*; D011140:Polyurethanes / Q000138:chemical synthesis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014961:X-Ray Diffraction
D001672:Biocompatible Materials; D003485:Cyanates; D006018:Glycols; D017953:Isocyanates; D009829:Oleic Acids; D011140:Polyurethanes; C015262:1,6-hexamethylene diisocyanate; C079909:1,9-nonanediol