Polyhydroxyurethane thermosets from novolac epoxide : synthesis and its nanostructured blends with poly(trifluoroethylacrylate)-block-poly(N-vinylpyrrolidone) diblock copolymer

Li, Lei; Ge, Wenming; Zhao, Bingjie; Adeel, Muhammad; Mei, Honggang; Zheng, Sixun

doi:10.1016/J.POLYMER.2020.123314

Title

Polyhydroxyurethane thermosets from novolac epoxide : synthesis and its nanostructured blends with poly(trifluoroethylacrylate)-block-poly(N-vinylpyrrolidone) diblock copolymer

Author

Li, Lei

Ge, Wenming

Zhao, Bingjie

Adeel, Muhammad

Mei, Honggang

Zheng, Sixun

Abstract

A novel five-membered cyclic carbonate compound was synthesized via the reaction of novolac epoxide with carbon dioxide. The cyclic carbonate was then used as the precursor to prepare polyhydroxyurethane (PHU) thermosets with a trifunctional polyetheramine (i.e., Jeffamine T 403) as the crosslinking agent. To improve the thermomechanical properties as well as hydrophobicity, the PHU thermosets were further nanostructured by the use of a poly(trifluoroethyl acrylate)-block-poly(N-vinylpyrrolidinone) (PTFEA-b-PVPy) diblock copolymer. Compared to plain PHU thermoset, the nanostructured thermosets displayed enhanced glass transition temperatures (Tg's) and mechanical properties. Meanwhile, the surface hydrophobicity was significantly improved; the water surface contact angles of the thermosets have been increased up to 94.6°. With the introduction of PTFEA-b-PVPy, the nanostructured PHU thermosets still preserved the excellent shape memory and reprocessability at elevated temperature.

Language

English

Source (journal)

Polymer. - Guildford

Publication

Guildford : 2021

ISSN

0032-3861

DOI

10.1016/J.POLYMER.2020.123314

Volume/pages

213 (2021)