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The size of cryofracture figures in the network of segmented polyurethane elastomers
Author(s) -
Janik Helena
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200106)171:1<115::aid-masy115>3.0.co;2-9
Subject(s) - materials science , composite material , texture (cosmology) , brittleness , swelling , elastomer , fracture (geology) , scanning electron microscope , polyurethane , image (mathematics) , artificial intelligence , computer science
Cross‐linked segmented polyurethanes were broken below brittle ‐ ductile transition and their fracture surfaces were analysed by optical and electron microscopy. Shapes of polygonal appearance were present on the whole surface of the broken sample, and a radial texture with the fracture origin in the middle of polygons was observed. The average distance between cryofracture and origins ( L ) was measured for each polyurethane studied. The swelling degree was measured and junction‐point density calculated. A correlation between L and the junction‐point density, v , has been found to exist.