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研究生:羅一男
論文名稱:環氧樹脂以三價鉻之乙醯基丙酮錯鹽為潛性觸媒催化之硬化研究
指導教授:李進昌李進昌引用關係
學位類別:碩士
校院名稱:中正理工學院
系所名稱:應用化學研究所
學門:自然科學學門
學類:化學學類
論文種類:學術論文
論文出版年:1997
畢業學年度:85
語文別:中文
論文頁數:67
中文關鍵詞:環氧樹脂觸媒
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環氧樹脂/酸酐之潛性觸媒硬化系統在商業上已有應用,但此方面仍有很大之研究空間。本研究以環氧樹脂及酸酐硬化系統為對象,進一步探討加入潛性硬化觸媒(三價鉻之乙醯基丙酮錯鹽)之硬化反應機構。
本研究以DSC進行所配各配方之硬化熱分析,及其硬化產品之Tg分析。並以定溫油浴之方式測試各配方之pot1 life。本研究亦使用FT-IR在不同載體(KBr或PE膜)之下進行恆溫動態實驗,探討配方在定溫下隨時間改變之變化。本系統為了於FT-IR掃瞄下進行恆溫動態實驗,故自行設計一加熱套件,以利實驗之進行。
本研究引入雙羧基及雙醇基助觸媒以降低因生成microgel所造成之後段放熱,以達到縮短後硬化(post cure)時間之目的。發現兩者皆有顯著之效果。本研究並探討硬化劑、潛性觸媒濃度、加熱速率、羧酸基或醇基助觸媒、單或雙官能基、不同分子量助觸媒對硬化系統之影響,及實驗配方之凝膠時間與Tg特性。
此外亦發現KBr於動態實驗中,有加速硬化反應之現象,故本研究以PE膜代替KBr為載體進行實驗,並針對此現象設計DSC實驗,並引進安定性高之Al2O3作比較,其結果發現熱傳效率為其可能之主要影響因素。


Latent catalyst curing system of epoxy resin/anhydride had been used for many years in commerce. However, there was still a lot of research spaces in this field. We focused on the curing mechanism of the latent catalyst (Chromium (Ⅲ) acetylacetonate) of epoxy resin/anhydride system in this research.
DSC in this research was used to proceed curing thermal analysis of the samples, and to analyze the Tg of the cured products. Oil bath was used to test the pot life of the samples in isothermal condition. FT-IR was used to proceed isothermal dynamic experiments with different carrier (KBr or PE film), and to study the change with time of the samples in isothermal condition. For proceeding the isothermal dynamic experiments more convenient with FT-IR, a heating accessory was designed by ourselves.
In this research, di-carboxyl group or di-hydroxyl group cocatalysts were added to reduce the exothermic reaction cause of microgel in later stage, and to reach the goal of reducing the time of post cure. This research also studied the effect of curing agents, concentration of latent catalyst, heating rate, di-carboxyl group or di-hydroxyl group cocatalysts, and cocatalyst of different molecular weight in this curing system. Then, we also find the gel time and Tg of the experiment samples.
Furthermore, we found that KBr has the capability to accelerate curing reaction during dynamic experiments. So the PE film was used as a carrier to replace KBr to proceed experiments, and a DSC experiment was designed for this phenomenon. Then Al2O3, which is stable, was added to compare with KBr and PE film. According to the result, heat transfers maybe the major factor to this phenomenon.

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