Mechanical Properties and Water Permeability of the A–B–A Tri-Block Copolymer Consisting of Poly(γ-benzyl D,L-glutamate) or Poly(γ-methyl D,L-glutamate) as the A Component and Polybutadiene as the B Component
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- Chen Guan-Wen
- Research Center for Medical Polymers and Biomaterials, Kyoto University
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- Hayashi Toshio
- Research Center for Medical Polymers and Biomaterials, Kyoto University
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- Nakajima Akio
- Research Center for Medical Polymers and Biomaterials, Kyoto University
書誌事項
- タイトル別名
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- Mechanical properties and water permeability of the A-B-A tri-block copolymer consisting of poly(.GAMMA.-benzyl D,L-glutamate) or poly(.GAMMA.-methyl D,L-glutamate) as the A component and polybutadiene as the B component.
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説明
Membranes of A–B–A tri-block copolymers were prepared by polymerizing poly(γ-benzyl D,L-glutamate) or poly(γ-methyl D,L-glutamate) as the A component and polybutadiene as the B component. The mechanical properties of and the hydraulic permeability of water were examined and compared with those properties for A–B–A tri-block copolymers consisting of poly(γ-benzyl L-glutamate) or poly(γ-methyl L-glutamate) as the A component and polybutadiene as the B component. The temperature dependence of the dynamic modulus and the loss modulus were investigated based on Takayanagi’s mechanical model. The mechanical properties led to the conclusion that the dynamic mechanical spectra could be well explained by the microheterophase structure observed with an electron microscope. In the case the shape of the inclusion phase was assumed to be spherical, the storage modulus E′ calculated by means of Takayanagi’s equation showed excellent agreement with the experimental data for D,L-type block copolymers, indicating that spherical inclusion phases exist in them in spite of their rather high volume fractions of the B portion. The hydraulic permeability coefficient K of water through D,L-type block copolymer membranes was remarkably lower than that of L-type membranes. This may indicate that the A domains are homogeneous in shape and dispersion state for the D,L-type block copolymer, owing to the existence of a molecular chain portion capable of forming interchain hydrogen bonds.
収録刊行物
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- Polymer Journal
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Polymer Journal 16 (11), 805-814, 1984
The Society of Polymer Science, Japan
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詳細情報 詳細情報について
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- CRID
- 1390282681264514432
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- NII論文ID
- 130004767764
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- COI
- 1:CAS:528:DyaL2MXhsV2ktL4%3D
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- ISSN
- 13490540
- 00323896
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
