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Raising glass transition temperature of polymer nanofilms as a function of negative interface energy

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Abstract

Based on a thermodynamic approach, glass transition temperature (Tg) of substrate-supported polymer nanofilms (s-PNFs) is investigated for carbon-chain polymers, taking the role of the interface energy into consideration. Relative to the Tg depression, originating from the positive interface energy due to the weak interfacial van der Waals interactions, the Tg raise is reversely induced by the negative interface energy, induced by the hydrogen bonds formed between the side-chains of polymers and the surface hydroxyl groups of substrates. Moreover, the Tg raise can be reinforced for s-PNFs with simple side-chains. The model predictions agree well with available experimental or simulation results.

Graphical abstract: Raising glass transition temperature of polymer nanofilms as a function of negative interface energy

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Publication details

The article was received on 27 Nov 2018, accepted on 06 Feb 2019 and first published on 07 Feb 2019


Article type: Paper
DOI: 10.1039/C8CP07267A
Citation: Phys. Chem. Chem. Phys., 2019, Advance Article

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    Raising glass transition temperature of polymer nanofilms as a function of negative interface energy

    X. Yao, Y. Wang, X. Lang, Y. Zhu and Q. Jiang, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C8CP07267A

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