Impact of Hydroxyl Functionalization and Unsaturation on Linear Poly(ethylene-co-vinyl alcohol)

Radzanowski, Anne N.; Fastow, Eli J.; Tu, Chien-Hua; Votruba-Drzal, James; Nair, Vivek; Winey, Karen I.; Coughlin, E. Bryan

doi:10.1021/acs.macromol.4c02575

Impact of Hydroxyl Functionalization and Unsaturation on Linear Poly(ethylene-co-vinyl alcohol)

Journal Article · Sun Feb 23 23:00:00 EST 2025 · Macromolecules

DOI:https://doi.org/10.1021/acs.macromol.4c02575· OSTI ID:2583358

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University of Massachusetts, Amherst, MA (United States)
University of Pennsylvania, Philadelphia, PA (United States)

Functionalization of C═C in unsaturated polyolefins by hydroboration/oxidation successfully generates linear poly(ethylene-co-vinyl alcohol) (LEVOH) polymers. This postpolymerization modification expands upon previously reported chemistry to control the extent of functionalization through reagent stoichiometry. Partial functionalization (24–92% of C═C) of polycyclooctene produces materials with both C═C in the backbone and pendant OH and subsequent hydrogenation generate a LEVOH. We explore the thermal, structural, surface, and adhesive properties of these LEVOH and the partially unsaturated intermediate and find they are impacted by both the extent of OH incorporation and saturation. The presence of C═C significantly reduces the melting temperature and crystallinity while increasing surface polarity and adhesive strength compared with saturated polymers at equivalent functionalization. Furthermore, this investigation demonstrates linear analogs of EVOH with a wide range of properties tuned by extent of hydroxylation and presence of unsaturation.

View Accepted Manuscript (DOE)

Research Organization:: University of Pennsylvania, Philadelphia, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: SC0022238

OSTI ID:: 2583358

Journal Information:: Macromolecules, Journal Name: Macromolecules Journal Issue: 5 Vol. 58; ISSN 1520-5835; ISSN 0024-9297

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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