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Light‐scattering characterization of polyblends in the presence of multiple‐scattering conditions
Author(s) -
Cielo P.,
Favis B. D.,
Maldague X.
Publication year - 1987
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760272106
Subject(s) - materials science , scattering , characterization (materials science) , light scattering , optics , polycarbonate , diffraction , composite material , phase (matter) , polypropylene , nanotechnology , physics , quantum mechanics
A novel approach is described for the noncontact evaluation of structural morphology in polyblends by light scattering. Optical methods are attractive for the on‐line characterization of translucent materials because they are noninvasive, rapid, and applicable to high temperature materials. One limitation of conventional light‐scattering techniques is their requirement for relatively thin samples in order to avoid multiple‐scattering effects that smear out the details of the light diffraction pattern. The approach described in this paper is meant to circumvent this limitation by resorting to turbidimetric measurements, which provide useful information on the average size, shape, concentration, and orientation of the dispersed phase particles even in the presence of multiple scattering. The sample thickness is no longer restricted, and methods are described by which the near‐surface volume of infinitely thick parts may be inspected with access to a single side of the material. Results are presented for polypropylene‐polycarbonate (PP/PC) samples of different thicknesses and microstructural morphology, including fibrillar‐type oriented structures.