• 作者： Chen, Teng-Ko; Chen, Chin-Pei; Chiu, Yie-Shun
• 中文摘要： 本論文乃針對一系列高溫型環氧樹脂(T/sub g/>175.degree.C)做橡膠增韌性的研究。使用的環氧樹脂包括DGEBA(diglycidyl ether of bisphenol-A)、TGDDM(4,4'-diamino-diphenol methane)及Epoxy Novolac(polyglycidyl ether of phenol-formaldehyde)。這些樹脂皆以反應性液態橡膠CTBN(carboxyl-terminated butadiene-acrylonitrile random copolymer)來增韌,並以等量的硬化劑DDS(4,4'-diamino diphenyl sulfone)來硬化。動態機械性質分析顯示,這些樹脂與所添加橡膠間的相分離十分完全。耐熱性質及機械性質分析顯示這兩種性質不太受橡膠含量的影響。破裂能量測試的結果發現,樹脂相的交聯密度是決定橡膠增韌樹脂的重要變因; 愈高的交聯密度會造成增韌系統愈低的韌性。破裂表面形態學的觀察顯示,發生在膠粒/基材界面的空穴形變及產生在基材相內的剪切形變為這些橡膠增韌環氧樹脂的兩個主要的增韌機構。
• 英文摘要： A series of high temperature performance epoxy resins(T/sub g/>175.degree.C), diglycidyl ether of bisphenol-A(DGEBA), 4,4'-diamino-diphenol methane (TGDDM) and polyglycidyl ether of phenol- formaldehyde (Epoxy Novolac), were cured separately with the same amount of curing agent, 4,4'-diamino diphenyl sulfone (DDS), and toughened with the addition of carboxyl-terminated butadiene- acrylonitrile rubber (CTBN). Dynamic mechanical analysis indicates complete phase separation between the epoxy resins and the added rubbers. Thermal and mechanical properties of these epoxy resins were quite unaffected by the addition of rubber. Measurement of fracture toughness indicated that the crosslink density of matrix phase may play an important role in determining the toughness of the modified epoxy resin. Higher crosslink density results in lower fracture toughness. Morphological studies on the fractured surface indicated that the cavitation at particle/matrix interface and localized shear yielding in the resin matrix are the main toughening mechanisms for these rubber toughened epoxy resins.
• 中文關鍵字： 高溫; 破裂行為; 環氧樹脂; 橡膠增韌; 形態; 交聯密度
• 英文關鍵字： High Temperature; Fracture Behavior; Epoxy Resin; Rubber Toughening; Morphology; Crosslink Density