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Study on Surface Fracture Behavior of Acrylic Hard Coatings under Scratch Loading
http://hdl.handle.net/10212/2324
http://hdl.handle.net/10212/2324282c15b4-6582-4864-9f52-50d4a6d49cb3
| 名前 / ファイル | ライセンス | アクション |
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内容の要約 (43.2 KB)
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内容・審査結果の要旨 (254.4 KB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||||||
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| 公開日 | 2017-09-01 | |||||||||
| タイトル | ||||||||||
| タイトル | Study on Surface Fracture Behavior of Acrylic Hard Coatings under Scratch Loading | |||||||||
| 言語 | en | |||||||||
| その他のタイトル | ||||||||||
| その他のタイトル | アクリル系ハードコートのスクラッチ荷重下における表面破壊挙動に関する研究 | |||||||||
| 言語 | ja | |||||||||
| 作成者 |
チャオワタッ, パチャリダ
× チャオワタッ, パチャリダ
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| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Acrylic Hard Coatings | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Surface Fracture Behavior | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Scratch Test | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Soft Base Layer | |||||||||
| 内容記述 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Surface fracture behavior of polymeric coatings was studied using a progressive load scratch test according to ISO 19252. Acrylic coatings, i.e. Trimethylolpropane triacrylate (TMPTA), pentaerythriol triacrylate (PETA) on Poly (methyl methacrylate) (PMMA) substrate were chosen as studied models. Effects of material characteristics and coating composition were investigated. The coatings with and without soft base layer were prepared to demonstrate the soft base layer effect. It was found that the presence of soft base layer resulted in excellent resistance to crack initiation and substrate exposure. Moreover, crack extension was slowed down when the soft base layer was incorporated into the coating systems. An increase of soft base layer thickness was also able to further enhance the scratch resistance and effectively retarded crack extension. In addition, the influence of soft base layer on mar and abrasion behavior was studied. Mar and abrasion behavior were strongly influenced by the soft base layer despite using different top layers. The SCOF and surface roughness significantly reduced with increasing the soft base layer thickness. To further verify the soft base layer effect on scratch behavior, soft base layer with different hardness was prepared by incorporating diacrylate monomer. The scratch test result was greatly support the above results. The introduction of soft base layer caused a great improvement on scratch resistance. However, it seemed that there is an optimum hardness of soft base layer to achieve excellent scratch resistance. Additionally, influence of surface segregation of multi-funtional methylmethacrylate-POSS (MA8POSS) on surface physical properties of PETA coating was demonstrated. The results indicated that the scratch resistance was correlated with MA8POSS segregation behavior. Scratch resistance was deteriorated at MA8POSS loadings higher than 20 wt %. This because MA8POSS was fully covered the outermost surface and the degree of conversion was significantly regulated due to the huge steric hindrance of MA8POSS. This work indicated that surface fracture behavior of acrylic coating under scratch loading was strongly affected by the presence of the soft base layer. The localized stress at the top surface could be minimized when the soft base layer was introduced to the coating system. Moreover, it was found that surface segregation was one of the influencing factors for scratch behavior. | |||||||||
| 言語 | en | |||||||||
| 日付 | ||||||||||
| 日付 | 2016-03-25 | |||||||||
| 日付タイプ | Issued | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||||
| 資源タイプ | doctoral thesis | |||||||||
| 学位授与番号 | ||||||||||
| 学位授与番号 | 甲第798号 | |||||||||
| 学位名 | ||||||||||
| 言語 | ja | |||||||||
| 学位名 | 博士（学術） | |||||||||
| 学位授与年月日 | ||||||||||
| 学位授与年月日 | 2016-03-25 | |||||||||
| 学位授与機関 | ||||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||||
| 学位授与機関識別子 | 14303 | |||||||||
| 言語 | ja | |||||||||
| 学位授与機関名 | 京都工芸繊維大学 | |||||||||
