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題 名 | The Toughness and Fracture Properties of Thermoplastics Toughened Epoxy Resin=熱塑性塑膠增韌環氧樹脂之韌性及破壞機構 |
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作 者 | 李曄旭; 張士欽; 李明旭; 施文昌; 馬振基; | 書刊名 | 材料科學 |
卷 期 | 26:1 1994.03[民83.03] |
頁 次 | 頁13-20 |
分類號 | 467.41 |
關鍵詞 | 環氧樹脂; 增韌機構; 破壞性質; Epoxy; Toughening mechanism; Fracture properties; |
語 文 | 英文(English) |
中文摘要 | 本論文旨在探討以熱塑性之苯氧基聚合物,聚碳酸酯及杜塞型PU之預 聚合物改質的環氧樹脂,所顯現出不同的韌性及其增韌機構。由不同含量之增韌 基質所顯現出不同的裂紋,可以瞭解影響環氧樹脂韌性的因素有:增韌基質的添 加量,增韌物與樹脂之間的相容性,以及改質後樹脂本身的變化。在快速衝擊破 壞之測試下,環氧樹脂添加10phr的苯氧基聚合物或杜塞型PU之預聚合物顯示較 佳的韌性;而添加聚碳酸酯對韌性並沒有明顯的改善。但以慢速度,準靜態的破 壞模式測試,則顯示添加15phr的杜塞型PU預聚合物或10phr的聚碳酸酯有較佳的 表現;但加入苯氧基聚合物的效果並不明顯。增韌機構的觀察是以掃描式電子顯 微鏡觀察試片經衝擊後所產生之斷裂面。而玻璃轉換溫度(Tg)的量測可以輔助增 韌機構的判斷。 |
英文摘要 | The fracture properties of toughened epoxy by Phenoxy, Polycarbonate and blocked NCO terminated PU prepolymer were studied. The toughening mechanism of the system was investigated. Different crack patterns were observed on the test specimens with different plastics contents. The toughness of a toughened material is affected by the amount of particles, the miscibility of particle and matrix material, and the property of matrix material. Under dynamic condition, the epoxy resincontaining 10 phr blocked NCO-terminated PU prepolymer or 10 phr Phenoxy showed good toughness. On the other hand, the effect of adding Polycarbonate on toughness of epoxy resin is insignificant. Under quasi-static condition (KIC's test), the best toughening result of resin by adding blocked NCO terminated PU prepolymer and Polycarbonate was obtained at 15 phr and 10 phr, respectively, and the toughening effect is insignificant by adding Phenoxy in epoxy. The toughening mechanism was investigated by examining the fracture morphology with SEM photographs. The toughening mechanism of the system was confirmed by the Tg measurement. |
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