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Penetrant Diffusion in Triblock Polymer by Pulse-Field-Gradient NMR and Lattice Model Simulation

Published online by Cambridge University Press:  26 February 2011

Xueqian Kong ,
Tabitha Hargrove ,
Sara Ouellette ,
Marcus V. Giotto ,
Darryl Aucoin ,
Gouxing Lin  and
Alan A. Jones
Xueqian Kong
Affiliation:
xkong@clarku.edu, Clark University, Chemistry, 950 Main St., Worcester, MA, 01610, United States
Tabitha Hargrove
Affiliation:
thargrove@clarku.eduClark UniversityChemistry950 Main St.WorcesterMA01610United States
Sara Ouellette
Affiliation:
souellette@clarku.eduClark UniversityChemistry950 Main St.WorcesterMA01610United States
Marcus V. Giotto
Affiliation:
mgiotto@clarku.eduClark UniversityChemistry950 Main St.WorcesterMA01610United States
Darryl Aucoin
Affiliation:
Daucoin@clarku.eduClark UniversityChemistry950 Main St.WorcesterMA01610United States
Gouxing Lin
Affiliation:
glin@clarku.eduClark UniversityChemistry950 Main St.WorcesterMA01610United States
Alan A. Jones
Affiliation:
AJones@clarku.eduClark UniversityChemistry950 Main St.WorcesterMA01610United States
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Abstract

The three versions of poly-styrene-ethylene/butylene-styrene (SEBS) triblock copolymers under investigation have different micro-scale morphologies: polystyrene (PS) spheres in poly-ethylene/butylene (EB) matrix, PS cylinders in EB matrix and EB cylinders in PS matrix. The diffusion phenomena of 2,2,4-trimethyl pentane (TMP) in SEBS probed with pulse field gradient NMR show distinct features related to the morphological characteristics. The micron scale size of grain boundaries may be obtained. In addition, the lattice model simulation was performed for the TMP diffusion in the membrane with spherical morphology.

Keywords

diffusionnuclear magnetic resonance (NMR)polymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 984: Symposium MM – Magnetic Resonance in Material Science , 2006 , 0984-MM09-07
Copyright
Copyright © Materials Research Society 2007

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