- 期刊
架橋劑對ER/PF摻合樹脂硬化性及熱性質之影響
EFFECT OF CROSSLINKING AGENTS ON THE CURING BEHAVIOR AND THERMAL PROPERTIES OF ER/PF BLENDED RESINS
摘要
本研究利用雙酚A與環氧氯丙烷反應製備環氧樹脂（Epoxy resins; ER），以酚與福馬林反應製備Novolac型酚醛樹脂（Phenol-formaldehyde resins; PF）。利用熱示差掃描卡量儀（Differential scanning calorimeter; DSC）分析環氧樹脂與三乙基四胺（Triethylene tetramine; TETA）、順丁烯二酸酐（Maleic anhydride; MA）、六亞甲基四胺（Hexamethylenetetramine; Hexamine）及PF樹脂反應性。進一步將等當量比的環氧樹脂與PF樹脂混合調配ER/PF摻合樹脂，探討添加三苯基磷（Triphenylphosphine; TPP）為催化劑及添加TETA、MA、Hexamine等不同種類架橋劑對摻合樹脂硬化行為及硬化樹脂性質之影響。由試驗結果顯示，添加TETA、MA及Hexamine的環氧樹脂在DSC熱掃描過程均出現架橋反應的明顯放熱峰，添加PF樹脂之反應則不明顯。然在ER/PF摻合樹脂中添加TPP為催化劑則在加熱過程中出現架橋反應，進一步添加Hexamine則可增加其架橋反應放熱量，並使其硬化樹脂有較高的彈性模數，較低的熱活動性及較佳的熱抵抗性。
並列摘要
In this study, epoxy resins (ER) was prepared by reacting bisphenol A with epichlorohydrin, and phenol-formaldehyde resins (PF) was synthesized by reacting phenol with formalin. The reactivity of ER resin with triethylene tetramine (TETA), maleic anhydride (MA), hexamethylenetetramine (Hexamine) and PF resin was analyzed via differential scanning calorimeter (DSC). Further, an equivalent ratio of epoxy resin and PF resin was mixed to prepare the ER/PF blended resin. The effects of adding triphenylphosphine (TPP) as a catalyst and the addition of different crosslinking agents, such as TETA, MA and hexamine, on the curing behavior and the properties of set resins were investigated. The results showed that a significant exothermic peak caused by the crosslinking reaction appeared for epoxy resin mixed with TETA, MA and hexamine during the DSC thermal scanning, but in the case of mixing PF resin, the reaction was not obvious. However, the crosslinking reaction occurred for ER/PF blended resin with TPP as a catalyst during the process of heating. Further addition of hexamine could increase the exothermic heat of the crosslinking reaction and make the set resin have a higher elastic modulus, lower thermal activity and better thermal resistance.
延伸閱讀
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