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Epitaxial crystallization of polyphenylene sulfide: Lattice effects on structures

Published online by Cambridge University Press:  31 January 2011

X. J. Qian ,
S. E. Rickert  and
J. B. Lando
X. J. Qian
Affiliation:
Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
S. E. Rickert
Affiliation:
Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
J. B. Lando
Affiliation:
Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
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Abstract

The investigation of dilute solution epitaxy of polyphenylene sulfide (PPS) has been carried out on a series of inorganic substrates, which cover a wide range of interatomic spacings, surface energies, and geometries. A variety of morphological arrangements of PPS on various substrates were observed. Both 〈100〉 and 〈110〉 epitaxial orientations were observed on monovalent alkali halides. While the 〈100〉 epitaxy is generally thought to grow upon nucleation on surface steps along the 〈100〉 direction, 〈110〉 epitaxy may also be nucleated on these surface steps. Changes in ionic lattice dimensions and ionic nature of the substrate have a substantial effect on the molecular packing of PPS and the resulting crystal orientations. Four new crystalline phases of PPS have resulted from the fold surface epitaxies on NaCl, KCl, KBr, and mica with favorable one- or two-dimensional lattice matching. This is a direct indication of the important role of lattice matching in inducing and defining the epitaxies and polymorphism of PPS.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 4 , August 1989 , pp. 1005 - 1017
Copyright
Copyright © Materials Research Society 1989

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