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Strain Field Analysis and Kinetics of Crack Propagation of Binary Triblock Copolymer Blends
Author(s) -
Satapathy Bhabani Kumar,
Staudinger Ulrike,
Weidisch Roland,
Lach Ralf,
Janke Andreas,
Knoll Konrad
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500730
Subject(s) - materials science , composite material , copolymer , fracture toughness , toughness , fracture mechanics , lamellar structure , fracture (geology) , thermoplastic elastomer , thermoplastic , deformation (meteorology) , elastomer , displacement (psychology) , polymer , psychology , psychotherapist
Summary: The crack toughness behaviour of binary styrene‐butadiene (SB) triblock copolymer blends of a thermoplastic block copolymer (LN3) and a thermoplastic elastomer (LN4) with different molecular architecture was studied using essential work of fracture (EWF) concept and was correlated to the morphological features from transmission electron microscopy (TEM). An increase in the crack toughness behaviour between 60 and 80 wt.‐% LN3 has been observed and is attributed to a change from cylindrical to lamellar morphology. The time‐resolved crack propagation studies have offered new dimensions to understand the kinetic aspects of fracture behaviour while the strain field analysis has explained the time‐dependent deformation behaviour to characterise the time dependence of the strain energy dissipation modes.Load‐displacement diagrams of non essential work of fracture values of LN3/LN4 blends.