Transient Network Structure of ABA Triblock Copolymer Solution and Its Deformation and Reconstruction Behavior
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- INOMATA Katsuhiro
- Nagoya Institute of Technology
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- BANNO Ai
- Nagoya Institute of Technology
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- SATO Eijiro
- Nagoya Institute of Technology
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- SUGIMOTO Hideki
- Nagoya Institute of Technology
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- NAKANISHI Eiji
- Nagoya Institute of Technology
Bibliographic Information
- Other Title
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- ABAトリブロック共重合体溶液の組み替え網目構造とその変形・回復挙動
- ABA トリブロック キョウジュウゴウタイ ヨウエキ ノ クミカエ アミメ コウゾウ ト ソノ ヘンケイ カイフク キョドウ
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Abstract
Transient network structures of ABA triblock copolymer, poly(methyl methacrylate)-block-poly(tert-butyl acrylate)-block-poly(methyl methacrylate) (PMMA-PtBuA-PMMA) in a solvent selective for the middle block have been investigated by means of small-angle X-ray scattering (SAXS) and viscoelastic measurements. In the SAXS profiles for solutions just above a sol-gel transition concentration, no correlation peaks corresponding to distances between PMMA cores bridged by PtBuA chain were observed, suggesting that significant amounts of PMMA associated cores are not included in the transient network. Even after step shear flow performed on 8.0 wt% solution in physical gel state, the linear dynamic viscoelasticity was almost identical with the result obtained before the shear flow. On the other hand, the step shear flow for 4.4 wt% solution reduced the plateau storage modulus by almost half. These linear and nonlinear viscoelasticities revealed that the deformation and reconstruction behavior of the transient network by the shear flow is influenced by the denseness of the network structure as well as by the association strength of the PMMA core.<br>
Journal
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- KOBUNSHI RONBUNSHU
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KOBUNSHI RONBUNSHU 64 (5), 309-316, 2007
The Society of Polymer Science, Japan
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Details
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- CRID
- 1390282681499696384
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- NII Article ID
- 10019929843
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- NII Book ID
- AN00085011
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- ISSN
- 18815685
- 03862186
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- NDL BIB ID
- 8838419
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed