Spatial heterogeneity of glassy polymer films

Igor Siretanu; Hassan Saadaoui; Jean Paul Chapel; Carlos Drummond

doi:10.1021/ma502610u

Spatial heterogeneity of glassy polymer films

Igor Siretanu, Hassan Saadaoui, Jean Paul Chapel, Carlos Drummond^*

^*Corresponding author for this work

Physics of Complex Fluids

Research output: Contribution to journal › Article › Academic › peer-review

9 Citations (Scopus)

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Abstract

By studying the morphology of polystyrene films subjected to a fast structuration method, we demonstrate the spatial heterogeneity of their surface viscoelasticity at temperatures well below the glass transition temperature, T_g. Our results point to a nonrandom arrangement of zones of different elastic modulus deep in the glassy state. The spatial distribution of viscoelastic properties of the film was temperature dependent; we observed the presence of soft zones (surrounded by areas of larger elastic modulus) spanning increasingly larger areas of the surface as T gets closer to T_g. The heterogeneity on viscoelastic properties of the film is supported by the temporal evolution and relaxation of the structured surfaces and by direct measurements of the spatial distribution of the local elastic modulus of polystyrene films.

Original language	English
Pages (from-to)	2787-2792
Number of pages	6
Journal	Macromolecules
Volume	48
Issue number	8
DOIs	https://doi.org/10.1021/ma502610u
Publication status	Published - 28 Apr 2015

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10.1021/ma502610u

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abstract = "By studying the morphology of polystyrene films subjected to a fast structuration method, we demonstrate the spatial heterogeneity of their surface viscoelasticity at temperatures well below the glass transition temperature, Tg. Our results point to a nonrandom arrangement of zones of different elastic modulus deep in the glassy state. The spatial distribution of viscoelastic properties of the film was temperature dependent; we observed the presence of soft zones (surrounded by areas of larger elastic modulus) spanning increasingly larger areas of the surface as T gets closer to Tg. The heterogeneity on viscoelastic properties of the film is supported by the temporal evolution and relaxation of the structured surfaces and by direct measurements of the spatial distribution of the local elastic modulus of polystyrene films.",

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AU - Saadaoui, Hassan

AU - Chapel, Jean Paul

AU - Drummond, Carlos

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N2 - By studying the morphology of polystyrene films subjected to a fast structuration method, we demonstrate the spatial heterogeneity of their surface viscoelasticity at temperatures well below the glass transition temperature, Tg. Our results point to a nonrandom arrangement of zones of different elastic modulus deep in the glassy state. The spatial distribution of viscoelastic properties of the film was temperature dependent; we observed the presence of soft zones (surrounded by areas of larger elastic modulus) spanning increasingly larger areas of the surface as T gets closer to Tg. The heterogeneity on viscoelastic properties of the film is supported by the temporal evolution and relaxation of the structured surfaces and by direct measurements of the spatial distribution of the local elastic modulus of polystyrene films.

AB - By studying the morphology of polystyrene films subjected to a fast structuration method, we demonstrate the spatial heterogeneity of their surface viscoelasticity at temperatures well below the glass transition temperature, Tg. Our results point to a nonrandom arrangement of zones of different elastic modulus deep in the glassy state. The spatial distribution of viscoelastic properties of the film was temperature dependent; we observed the presence of soft zones (surrounded by areas of larger elastic modulus) spanning increasingly larger areas of the surface as T gets closer to Tg. The heterogeneity on viscoelastic properties of the film is supported by the temporal evolution and relaxation of the structured surfaces and by direct measurements of the spatial distribution of the local elastic modulus of polystyrene films.

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JO - Macromolecules

JF - Macromolecules

IS - 8

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Spatial heterogeneity of glassy polymer films

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