Image analysis for interfacial area and cocontinuity detection in polymer blends

Abstract A novel image processing method was developed to extract interfacial area concentration measurements from 2D micrographs of immiscible polymer blends. Although this method can be used for analyzing different types of 2D micrographs such as optical or transmission electron microscopy images, it was designed for analyzing scanning electron microscopy (SEM) images. The method operates by detecting edges within the images and using standard image processing operations to selectively eliminate false edges. SEM images of polyethylene oxide/polystyrene (PEO/PS) blends were analyzed using this image processing method to measure the amount of interfacial area in the samples. Interfacial area per unit volume exhibits maxima for blend compositions at the boundary between droplet and cocontinuous morphologies. In addition to the detection of cocontinuity, the interfacial area measurements facilitated by this method may be used in future investigations of blend dynamics, including coalescence, drop deformation, and blend rheology studies. These measurements may also be used to quantify the effects of compatibilizers on blend morphology.

[1]  P. Carreau,et al.  Investigating the morphology/rheology interrelationships in immiscible polymer blends , 2000 .

[2]  New Algorithms for 3-D Imaging and Analysis of Open-Celled Foams , 2001 .

[3]  William K. Pratt,et al.  Digital image processing (2nd ed.) , 1991 .

[4]  J. Manson,et al.  Phase continuity and inversion in polymer blends and simultaneous interpenetrating networks , 1986 .

[5]  C. Friedrich,et al.  Cocontinuous polymer blends: influence of viscosity and elasticity ratios of the constituent polymers on phase inversion , 2001 .

[6]  O. Park,et al.  Rheology and dynamics of immiscible polymer blends , 1994 .

[7]  Takashi Inoue,et al.  Method of Effective Ellipses for Digital Image Analysis of Size, Shape, Orientation, and Interparticle Distances in Polymer Blends: Application to a Study of Polyamide 6/Polysulfone Reactive Blending , 1997 .

[8]  J. Dam,et al.  On the coarsening of co-continuous morphologies in polymer blends: effect of interfacial tension, viscosity and physical cross-links , 2000 .

[9]  W. Gronski,et al.  Structure Development of a Polybutadiene/Polyisoprene Blend during Spinodal Decomposition. Comparison between Light Scattering and Optical Microscopy , 1995 .

[10]  Takashi Inoue,et al.  Morphology of compatibilized polymer blends in terms of particle size-asphericity map , 2000 .

[11]  Linda G. Shapiro,et al.  Computer and Robot Vision , 1991 .

[12]  L. Utracki.  On the viscosity‐concentration dependence of immiscible polymer blends , 1991 .

[13]  W. Heeschen.  A quantitative image analysis method for the determination of cocontinuity in polymer blends , 1993 .

[14]  J. Honerkamp,et al.  Morphological and rheological detection of the phase inversion of PMMA/PS polymer blends , 1998 .

[15]  B. Favis,et al.  Interfacial tension reduction and coalescence suppression in compatibilized polymer blends , 1999 .

[16]  C. Macosko,et al.  Coalescence in Polymer Blends during Shearing , 2000 .

[17]  L. Utracki,et al.  Polymer Alloys and Blends , 1990 .

[18]  J. Palierne.  Linear rheology of viscoelastic emulsions with interfacial tension , 1990 .

[19]  Takao Ohta,et al.  Dynamics and rheology of complex interfaces. I , 1991 .

[20]  Sabu Thomas,et al.  Nylon 6/ethylene propylene rubber (EPM) blends: Phase morphology development during processing and comparison with literature data , 1999 .