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Cold rolled ABS. Part 2: Rubber morphology and tensile properties of hot stretched and cold rolled ABS
Author(s) -
Grancio M. R.,
Bibeau A. A.,
Claver G. C.
Publication year - 1972
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.760120611
Subject(s) - materials science , composite material , natural rubber , ultimate tensile strength , shear (geology) , electron micrographs , yield (engineering) , morphology (biology) , elongation , hot rolled , shear stress , electron microscope , optics , physics , biology , genetics
Cold rolling and hot stretching (105°C) both lead to increased failure stress and decreased stress whitening in model ABS composites while hot stretched samples alone retain a tensile yield dip. Further differences between hot stretching and cold rolling are revealed in electron micrographs obtained by the Kato method. In the hot stretched samples the ruber particles appear as elongated “cigar‐like” smooth ellipsoids which reflect the observed macroscopic orientation. SAN occlusions within the ruber particles are deformed to the same degree as the rubber. Ruber particles in cold rolled samples, however, exhibit a jagged, “hairy” surface indicating a high degree of shear distortion; and SAN occlusions within the rubber particles are not deformed in rolling. The rubber particles in cold rolled ABS are flattened and disk‐like rather than ellipsoidal.