Mechanical properties of weakly segregated block copolymers. 3. Influence of strain rate and temperature on tensile properties of poly(styrene-b-butyl methacrylate) diblock copolymers with different morphologies
Weidisch, Roland; Stamm, Manfred; Michler, G. H.et al.
nanostructured material; block copolymer; self assembly in bulk
Abstract :
[en] Poly(styrene-b-butyl methacrylate) diblock copolymers, PS-b-PBMA, with different morphologies are investigated with respect to the influence of strain rate and temperature on tensile properties. In the first part the mechanical properties of bicontinuous and perforated lamellar structure are compared with other morphologies. Diblock copolymers with bicontinuous structures (39% PS) show a much higher tensile strength as well as a higher strain at break than diblock copolymers with lamellar structures (50% PS). In the second part the dependence of tensile properties on strain rate and temperature are discussed for different morphologies. A diblock copolymer with a polystyrene content of 76% PS reveals hexagonally packed PBMA−cylinder, and the tensile strength, strain at break, and Young's modulus exceed the values of pure polystyrene at all measured strain rates. The interesting properties of PS-b-PBMA diblock copolymers are discussed with respect to the phase behavior, interface formation, and chain conformation.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Weidisch, Roland; Max-Planck-Institut für Polymerforschung, Mainz, Germany
Stamm, Manfred; Max-Planck-Institut für Polymerforschung, Mainz, Germany
Michler, G. H.; Martin-Luther-Universität Halle-Wittenberg, Institut fuür Werkstoffwissenschaft, Germany
Fischer, H.; TNO Institute of Applied Physics, Eindhoven, The Netherlands
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Mechanical properties of weakly segregated block copolymers. 3. Influence of strain rate and temperature on tensile properties of poly(styrene-b-butyl methacrylate) diblock copolymers with different morphologies
Publication date :
09 February 1999
Journal title :
Macromolecules
ISSN :
0024-9297
eISSN :
1520-5835
Publisher :
Amer Chemical Soc, Washington, United States - Washington
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