Surface modification via chain end segregation in polymer blends

T. F. Schaub; G. J. Kellogg; A. M. Mayes; R. Kulasekere; J. F. Ankner; H. Kaiser

doi:10.1021/ma9510810

Surface modification via chain end segregation in polymer blends

T. F. Schaub, G. J. Kellogg, A. M. Mayes, R. Kulasekere, J. F. Ankner, H. Kaiser

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Abstract

We have explored the use of chain end segregation as a means of controlling the properties of a polymer surface. Thin film blends of homopolystyrene (PS) and PS synthesized with low-energy oligotetrafluoroethylene chain ends (PS-TFE) were studied using neutron reflectivity. The fraction of PS-TFE that localizes near the surface was found to increase as a function of its concentration in the blend. Contact angle measurements indicate corresponding reductions in the surface tension due to the surface localization of the TFE chain ends. For a 10% blend of 6000 mol wt PS-TFE in 3 × 10⁵ mol wt PS, the surface coverage of fluorocarbon ends was found to be >20%. A free energy model of the blends gives good qualitative agreement with the experimental results.

Original language	English
Pages (from-to)	3982-3990
Number of pages	9
Journal	Macromolecules
Volume	29
Issue number	11
DOIs	https://doi.org/10.1021/ma9510810
State	Published - May 20 1996
Externally published	Yes

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title = "Surface modification via chain end segregation in polymer blends",

abstract = "We have explored the use of chain end segregation as a means of controlling the properties of a polymer surface. Thin film blends of homopolystyrene (PS) and PS synthesized with low-energy oligotetrafluoroethylene chain ends (PS-TFE) were studied using neutron reflectivity. The fraction of PS-TFE that localizes near the surface was found to increase as a function of its concentration in the blend. Contact angle measurements indicate corresponding reductions in the surface tension due to the surface localization of the TFE chain ends. For a 10% blend of 6000 mol wt PS-TFE in 3 × 105 mol wt PS, the surface coverage of fluorocarbon ends was found to be >20%. A free energy model of the blends gives good qualitative agreement with the experimental results.",

author = "Schaub, {T. F.} and Kellogg, {G. J.} and Mayes, {A. M.} and R. Kulasekere and Ankner, {J. F.} and H. Kaiser",

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T1 - Surface modification via chain end segregation in polymer blends

AU - Schaub, T. F.

AU - Kellogg, G. J.

AU - Mayes, A. M.

AU - Kulasekere, R.

AU - Ankner, J. F.

AU - Kaiser, H.

PY - 1996/5/20

Y1 - 1996/5/20

N2 - We have explored the use of chain end segregation as a means of controlling the properties of a polymer surface. Thin film blends of homopolystyrene (PS) and PS synthesized with low-energy oligotetrafluoroethylene chain ends (PS-TFE) were studied using neutron reflectivity. The fraction of PS-TFE that localizes near the surface was found to increase as a function of its concentration in the blend. Contact angle measurements indicate corresponding reductions in the surface tension due to the surface localization of the TFE chain ends. For a 10% blend of 6000 mol wt PS-TFE in 3 × 105 mol wt PS, the surface coverage of fluorocarbon ends was found to be >20%. A free energy model of the blends gives good qualitative agreement with the experimental results.

AB - We have explored the use of chain end segregation as a means of controlling the properties of a polymer surface. Thin film blends of homopolystyrene (PS) and PS synthesized with low-energy oligotetrafluoroethylene chain ends (PS-TFE) were studied using neutron reflectivity. The fraction of PS-TFE that localizes near the surface was found to increase as a function of its concentration in the blend. Contact angle measurements indicate corresponding reductions in the surface tension due to the surface localization of the TFE chain ends. For a 10% blend of 6000 mol wt PS-TFE in 3 × 105 mol wt PS, the surface coverage of fluorocarbon ends was found to be >20%. A free energy model of the blends gives good qualitative agreement with the experimental results.

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U2 - 10.1021/ma9510810

DO - 10.1021/ma9510810

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JO - Macromolecules

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Surface modification via chain end segregation in polymer blends

Abstract

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