Polyurethanes based on isophorone diisocyanate trimer and polypropylene glycol crosslinked by thermal reversible diels alder reactions

• Published in: Journal of applied polymer science Vol. 134; no. 9; pp. np - n/a
• Main Authors: Irusta, Lourdes, Fernández‐Berridi, Ma José, Aizpurua, June
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 05.03.2017
• Subjects: Bismaleimides; Chemical synthesis; Crosslinking; Diels-Alder reactions; Diisocyanates; Enthalpy; Fourier transforms; Furfuryl alcohol; Healing; Infrared spectroscopy; Kinetics; Materials science; Monitoring; Polymers; Polypropylene glycol; polyurethane; Polyurethane resins; Rate constants; Synthesis (chemistry); Thermoplastic resins; Trimers
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.44543

ABSTRACT Crosslinked self‐healing polyurethanes based on Diels–Alder (DA) reaction were synthesized from a trifunctionalized isophorone diisocyanate (IPDI) and polypropyleneglycol prepolymer with furfuryl alcohol and a commercial bismaleimide. The DA reaction was followed by FTIR spectroscopy at different temperatures. From the infrared results the kinetic rate constants as well as the DA reaction reversibility were established. The retro DA reaction (rDA) and its reversibility was monitored by DSC according to the enthalpy involved in the process. The obtained polymers exhibited thermosetting properties at room temperature, although they showed thermoplastic behavior at high temperatures. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44543.