Binary shape-stabilized phase change materials based on poly(ethylene glycol)/polyurethane composite with dual-phase transition


Novel binary shape-stabilized composite phase change materials (CPCMs) have been successfully prepared using a crosslinked polyurethane (PU) copolymer with a solid–solid phase transition as the supporting framework for loading additional (‘free’) poly(ethylene glycol) (PEG). The PU copolymer was synthesized by a two-step method using 2-hydroxypropyl-β-cyclodextrin (Hp-β-CD) as a chain extender and PEG as a soft segment. The composition, morphology, phase transition behavior and thermal properties of the prepared CPCMs have been elucidated by a wide range of techniques. Investigation of FTIR spectra and SEM images reveal that the ‘free’ PEG and the PU copolymer network within the CPCMs have good compatibility and high affinity due to the noncovalent interactions. Polarized light optical microscopy shows that the CPCMs produce smaller spherulites than pristine PEG, and homogeneous nucleation was prevalent during the crystallization process. Due to the dual-phase transition of the CPCMs (the solid–liquid phase transition of ‘free’ PEG and solid–solid phase transition of the PU matrix) occurring within the same, narrow temperature window, the CPCMs have far higher heat storage density compared with that of traditional shape-stabilized PCMs with the same ‘free’ PEG content. Importantly, thermal cycling and thermogravimetric analyses show that the CPCMs have good reusability and excellent thermal stability for potential use in thermoregulation or energy storage applications.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Polymer Research Group
Additional Information: © Springer Nature B.V. 2018. The final publication is available at Springer via
Uncontrolled Keywords: General Materials Science,Mechanics of Materials,Mechanical Engineering
Publication ISSN: 1573-4803
Last Modified: 08 Jul 2024 07:42
Date Deposited: 13 Sep 2018 10:39
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://link.sp ... 0853-018-2806-2 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-12
Published Online Date: 2018-08-20
Accepted Date: 2018-08-11
Authors: Chen, Changzhong
Chen, Jun
Jia, Yifan
Topham, Paul D. (ORCID Profile 0000-0003-4152-6976)
Wang, Linge



Version: Accepted Version

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