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Cleavage fracture of two polystyrenes
Author(s) -
Earl B. L.,
Crook M.,
Loneragan R. J.,
Johns J. H. T.,
Markham J.
Publication year - 1974
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1974.070180727
Subject(s) - cleavage (geology) , scanning electron microscope , materials science , styrene , polymer , optical microscope , composite material , polymerization , impurity , suspension polymerization , electron microscope , suspension (topology) , fracture (geology) , polymer chemistry , copolymer , optics , chemistry , organic chemistry , physics , mathematics , homotopy , pure mathematics
Suspension and bulk‐polymerized commercial polystyrenes have been fractured by cleavage and the resulting surfaces examined by optical and scanning electron microscopy. The method of styrene polymerization was found to influence the initiation and propagation of fracture, probably owing to the differing amounts of insoluble impurities remaining in the polymer. Various new aspects of the fracture morphology are described, and measurements of craze thickness by scanning electron microscopy are compared with values calculated from optical interference fringes.