<b>Toughening of Cycloaliphatic Epoxy Resin by the Modification with </b><b>Polyvinyl Formal Resins </b>
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- OCHI Mitsukazu
- Faculty of Chemistry, Materials and Bioengineering, Kansai University
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- MATSUURA Kazuki
- Faculty of Chemistry, Materials and Bioengineering, Kansai University
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- HARADA Miyuki
- Faculty of Chemistry, Materials and Bioengineering, Kansai University
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- MATSUDA Etsuro
- Minamata Factory, JNC Corporation
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- TACHIBANA Kouhei
- Minamata Factory, JNC Corporation
Bibliographic Information
- Other Title
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- <b>ポリビニルホルマール樹脂による脂環式エポキシ樹脂の強靭化 </b>
- ポリビニルホルマール樹脂による脂環式エポキシ樹脂の強靭化
- ポリビニルホルマール ジュシ ニ ヨル シカンシキ エポキシ ジュシ ノ キョウジンカ
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Description
Toughening of cycloaliphatic epoxy resin with polyvinyl formal resins (PVF) that have good compatibility with the epoxy resin was investigated. The fracture energy in tensile tests and KIC in fracture toughness tests of the cured resin modified with 10wt% of PVF are three times and 1.3 times higher than those of the unmodified cured resins, respectively. In addition, the modified epoxy resins maintain high glass transition temperature (Tg>200℃) and high transparency even after the addition of PVF. The fractured surfaces of the unmodified and PVF-modified resins were observed with Atomic Force Microscope (AFM). It was clearly shown that the diameter of microgel increased considerably and its boundary became to be indistinct with the addition of PVF. These mean that the coexistence of PVF molecules in the gelation process of the epoxy resin suppressed the formation of the microgel. Such a suppression of the formation of microgel results in the increase in the toughness of the cured resins. SynopsisToughening of cycloaliphatic epoxy resin with polyvinyl formal resins (PVF) that have good compatibility with the epoxy resin was investigated. The fracture energy in tensile tests and KIC in fracture toughness tests of the cured resin modified with 10wt% of PVF are three times and 1.3 times higher than those of the unmodified cured resins, respectively. In addition, the modified epoxy resins maintain high glass transition temperature (Tg>200℃) and high transparency even after the addition of PVF. The fractured surfaces of the unmodified and PVF-modified resins were observed with Atomic Force Microscope (AFM). It was clearly shown that the diameter of microgel increased considerably and its boundary became to be indistinct with the addition of PVF. These mean that the coexistence of PVF molecules in the gelation process of the epoxy resin suppressed the formation of the microgel. Such a suppression of the formation of microgel results in the increase in the toughness of the cured resins.
Journal
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- Journal of Network Polymer,Japan
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Journal of Network Polymer,Japan 34 (6), 306-315, 2013
Japan Thermosetting Plastics Industry Association
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Details 詳細情報について
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- CRID
- 1390282680437840128
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- NII Article ID
- 130004991257
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- NII Book ID
- AN10521608
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- COI
- 1:CAS:528:DC%2BC2cXitV2qs7w%3D
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- ISSN
- 2186537X
- 13420577
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- NDL BIB ID
- 025017521
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed