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Effects of Direct Fiber Feeding Injection Molding on the Structure and Properties of Fiber Reinforced Polypropylene Composites
http://hdl.handle.net/10212/2501
http://hdl.handle.net/10212/25018105e936-1327-4beb-ad3f-8be37758e8c9
| 名前 / ファイル | ライセンス | アクション |
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全文 (70.6 MB)
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内容・審査結果の要旨 (191.0 KB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||||||
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| 公開日 | 2021-08-26 | |||||||||
| タイトル | ||||||||||
| タイトル | Effects of Direct Fiber Feeding Injection Molding on the Structure and Properties of Fiber Reinforced Polypropylene Composites | |||||||||
| 言語 | en | |||||||||
| その他のタイトル | ||||||||||
| その他のタイトル | 繊維強化ポリプロピレン複合材料の構造と性質に及ぼす直接繊維投入射出成形の影響 | |||||||||
| 言語 | ja | |||||||||
| 作成者 |
ゲン, ショウヒ
× ゲン, ショウヒ
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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 | Direct fiber feeding injection molding | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Fiber reinforced composite | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Polypropylene | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Carbon fiber | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Glass fiber | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Basalt fiber | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Interfacial shear strength | |||||||||
| 内容記述 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | For a further extending the application of short fiber reinforced polymer composites, pultrusion and direct in-line long fiber thermoplastic compounding technology are used in industry. However, those methods have some limitations such as low efficiency, high investment cost, and unstable quality. In this thesis, the main purpose is to obtain a higher performance fiber reinforced polypropylene composite by using a new method known as direct fiber feeding injection molding (DFFIM) to avoid the limitations mentioned above. First, the effect of process parameters including the number of fiber bundles, the number of fibers altogether feeding and pellets feeding speed on the mechanical properties of glass fiber reinforced polypropylene composites fabricated by DFFIM are discussed. The fracture surfaces were observed by scanning electron microscopy. Then, the tensile properties of glass fiber/carbon fiber reinforced polypropylene hybrid composites fabricated by DFFIM were predicted by considering fiber length and orientation using the modified Tsai-Hill criterion. The accuracy of the modified Tsai-Hill criterion was compared with other methods and then the most suitable approach to predict modulus and strength was determined. Moreover, the structure and interfacial shear strength were evaluated based on the skin-core-skin structure and modified Kelly-Tyson equation. The fiber dispersion status and interfacial shear strength (IFSS) of DFFIM hybrid composites in different layers were examined according to the skin-core-skin structure. The fiber dispersion status was evaluated qualitatively by scanning electron microscopy and quantitatively by the fiber distribution index (FDI). The IFSS between fibers and polypropylene of different composites in the skin layers and the core layer are discussed by considering fiber length and orientation distributions. Lastly, two types of vented injection molding machines with a different check ring and mold were used for manufacturing specimens. The fiber lengths were analyzed to identify the most suitable check ring and mold for the DFFIM process. Polyamide 6 and maleic anhydride-grafted polypropylene were incorporated as the auxiliaries to improve the interfacial bonding between the fibers and matrix and to enhance the stress transfer in the DFFIM composites. | |||||||||
| 言語 | en | |||||||||
| 日付 | ||||||||||
| 日付 | 2018-09-25 | |||||||||
| 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 | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| 学位授与番号 | ||||||||||
| 学位授与番号 | 甲第904号 | |||||||||
| 学位名 | ||||||||||
| 言語 | ja | |||||||||
| 学位名 | 博士（工学） | |||||||||
| 学位授与年月日 | ||||||||||
| 学位授与年月日 | 2018-09-25 | |||||||||
| 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 | |||||||||
