Isocyanate- and solvent-free synthesis of melt processible polyurea elastomers derived from urea as a monomer

Simple item page
dc.contributor.authorWhite, B. Tyleren
dc.contributor.authorMigliore, John M.en
dc.contributor.authorMapesa, Emmanuel U.en
dc.contributor.authorWolfgang, Josh D.en
dc.contributor.authorSangoro, Joshuaen
dc.contributor.authorLong, Timothy E.en
dc.contributor.departmentChemistryen
dc.contributor.departmentMacromolecules Innovation Instituteen
dc.date.accessioned2020-08-14T15:02:06Zen
dc.date.available2020-08-14T15:02:06Zen
dc.date.issued2020-05-18en
dc.description.abstractPolyurea elastomers are utilized for a myriad of applications ranging from coatings and foams to dielectric materials for capacitors and actuators. However, current synthetic methods for polyureas rely on highly reactive isocyanates, solvents, and catalysts, which collectively pose serious safety considerations. This report details the synthesis and characterization of melt processible, poly(tetramethylene oxide) (PTMO)-based segmented polyurea elastomers utilizing an isocyanate-, solvent-, and catalyst-free approach. Dynamic mechanical analysis and differential scanning calorimetry suggested microphase separation between the hard and soft segments. Tensile analysis revealed high strain at break for all segmented copolymers between 340 and 770%, and tunable modulus between 0.76 and 29.5 MPa. Dielectric spectroscopy revealed that the composition containing 20 wt% hard segment offered the highest permittivity at 10.6 (1 kHz, 300 K) of the segmented copolymers, indicating potential as a dielectric elastomer.en
dc.description.notesThe authors would like to acknowledge the Huntsman Corporation for generously providing the Jeffamine (R) utilized in this study. The authors also thank Christina Orsino in the Robert B. Moore group for carrying out variable temperature FTIR experiments. Emmanuel U. Mapesa and Joshua Sangoro acknowledge financial support from the National Science Foundation, Division of Materials Research, Polymers Program, through DMR-1905597.en
dc.description.sponsorshipNational Science Foundation, Division of Materials Research, Polymers ProgramNational Science Foundation (NSF) [DMR-1905597]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1039/d0ra02369hen
dc.identifier.eissn2046-2069en
dc.identifier.issue32en
dc.identifier.urihttp://hdl.handle.net/10919/99718en
dc.identifier.volume10en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleIsocyanate- and solvent-free synthesis of melt processible polyurea elastomers derived from urea as a monomeren
dc.title.serialRSC Advancesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
d0ra02369h.pdf
Size:
700.44 KB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Scholarly Works, Chemistry
Scholarly Works, Macromolecules Innovation Institute (MII)