STUDIES ON MORPHOLOGIES AND MECHANICAL PROPERTIES OF POLYSTYRENE-BLOCK-POLYETHYLENEBUTYLENE-BLOCK-POLYSTYRENE TRIBLOCK COPOLYMERS
スポンサーリンク
概要
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We report the effects of morphologies on mechanical properties of polystyrene-block-polyethylenebutylene-block-polystyrene(SEBS)triblock copolymers using SEBS samples with various compositions. The morphologies and the mechanical properties were examined by the small-angle X-ray scattering(SAXS)technique and the tensile stress-strain measurements, respectively. It is well known that the morphology of microphase-separated structures can be controlled by composition. We found that a border composition dividing spherical and cylindrical phases and that dividing cylindrical and lamellar phases shifted towards smaller values of φ_<PS>(in the case of φ_<PS>≤0.5)upon hydrogenation(from SEBS to SBS), where φ_<PS> denotes the volume fraction of polystyrene and SBS stands for polystyrene-block-polybutadiene-block-polystyrene. Namely, for example, an SEBS sample forms lamellar morphology even at a composition where an SBS sample forms cylinders. It is also confirmed that the mechanicali properties were well correlated with change of the morphologies with composition or upon thermal annealing.
- 社団法人日本材料学会の論文
- 1998-06-15
著者
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Masamoto Junzo
Department Of Management Science Fukui University Of Technology
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Masamoto J
Fukui Univ. Technol.
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SAKURAI Shinichi
Department of Polymer Science and Engineering, Kyoto Institute of Technology
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NOMURA Shunji
Department of Polymer Science & Engineering, Kyoto Institute of Technology
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UMEDA Hideo
Department of Polymer Science and Engineering, Kyoto Institute of Technology
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KITAGAWA Yuichi
Tuftec Development and Technology Department, Asahi Chemical Industry Co.Ltd.
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SUDA Yoshikazu
Tuftec Development and Technology Department, Asahi Chemical Industry Co.Ltd.
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Sakurai Shinichi
Department Of Polymer Science & Engineering Kyoto Institute Of Technology
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Umeda Hideo
Department Of Polymer Science And Engineering Kyoto Institute Of Technology
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Nomura Shunji
Department Of Polymer Science & Engineering Kyoto Institute Of Technology
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Suda Yoshikazu
Tuftec Development And Technology Department Asahi Chemical Industry Co.ltd.
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Kitagawa Y
Tuftec Development And Technology Department Asahi Chemical Industry Co.ltd.
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SAKURAI Shinichi
Department of Polymer Chemistry, Kyoto University
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