Self-Healing Thermoset Polyurethanes Driven by Host–Guest Interactions Between α-Cyclodextrin and Poly(ethylene glycol) Monomethyl Ether or Dodecanol Moieties DOI Creative Commons

Ryuji Miyagawa,

Mitsuhiro Shibata

Molecules, Journal Year: 2025, Volume and Issue: 30(9), P. 1941 - 1941

Published: April 27, 2025

Self-healing thermoset polymers have attracted significant attention because they contribute to resource and energy savings by extending their service life. The reactions between glycerol ethoxylate (GCE), α-cyclodextrin (α-CD), poly(ethylene glycol) monomethyl ether (MPEG), hexamethylene diisocyanate (HDI) at molar ratios of GCE:α-CD:MPEG = a:b:c produced polyurethane networks (GCM-abc, abc 311, 411, 511) containing α-CD MPEG as host guest moieties, respectively. To compare this with GCM-411, 1-dodecanol (DN) was used instead a molecule yield network (GCD-411). Dynamic mechanical analysis revealed the formation polymer network, loss tangent (tan δ) peak temperature (Tα) crosslinking density (νe) decreased increasing GCE fraction for GCMs, Tα νe values GCD were slightly higher than those GCM-411. tensile strength GCMs fraction, GCD-411 that All cured films healed room 24 h, healing efficiency (ησ), based on strength, increased in order GCM-311 < GCM-411 GCM-511 GCD-411. When from 80 °C, ησ 24-38% 45-62%. self-healed thrice treatment gradually each cycle.

Language: Английский

Self-Healing Thermoset Polyurethanes Driven by Host–Guest Interactions Between α-Cyclodextrin and Poly(ethylene glycol) Monomethyl Ether or Dodecanol Moieties DOI Creative Commons

Ryuji Miyagawa,

Mitsuhiro Shibata

Molecules, Journal Year: 2025, Volume and Issue: 30(9), P. 1941 - 1941

Published: April 27, 2025

Self-healing thermoset polymers have attracted significant attention because they contribute to resource and energy savings by extending their service life. The reactions between glycerol ethoxylate (GCE), α-cyclodextrin (α-CD), poly(ethylene glycol) monomethyl ether (MPEG), hexamethylene diisocyanate (HDI) at molar ratios of GCE:α-CD:MPEG = a:b:c produced polyurethane networks (GCM-abc, abc 311, 411, 511) containing α-CD MPEG as host guest moieties, respectively. To compare this with GCM-411, 1-dodecanol (DN) was used instead a molecule yield network (GCD-411). Dynamic mechanical analysis revealed the formation polymer network, loss tangent (tan δ) peak temperature (Tα) crosslinking density (νe) decreased increasing GCE fraction for GCMs, Tα νe values GCD were slightly higher than those GCM-411. tensile strength GCMs fraction, GCD-411 that All cured films healed room 24 h, healing efficiency (ησ), based on strength, increased in order GCM-311 < GCM-411 GCM-511 GCD-411. When from 80 °C, ησ 24-38% 45-62%. self-healed thrice treatment gradually each cycle.

Language: Английский

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