高分子主鏈型Polybenzoxazines的合成

本實驗是用四種商業化的芳香族二胺(P-diamine/DDM/ODA/BAPP)與Bisphenol A以及甲醛利用傳統的一步法合成，以雙胺為基質的傳統一步法合成常會遭遇的形成不易溶解於有機溶劑的Triazine結構，產生gel的情況，本實驗中能有效改善其gel產生情況，達到以高產率合成出一系列具有高分子量主鏈型的Benzoxazine，並利用NMR、FTIR來鑑定其結構正確。具有高分子量的一系列Benzoxazine，經由成膜及高溫硬化後，利用DSC、TGA、DMA、TMA等儀器檢測，呈現好的熱性質，具有高的玻璃轉化溫度(Tg)介於272~352oC之間、高裂解溫度(Td5%)介於369~ 407 oC之間和燃燒後的高殘餘量(Char yield)介於46~ 48 Wt%之間，相對於小分子量的Benzoxazine,在未來應用上更具有發展性。 英文摘要 In this study, a series of benzoxazines synthesized by traditional approaches using four typical aromatic diamines－P-diamine, DDM, ODA, and BAPP. The process of the traditional approaches usually met generates a lot of gelation or not easy decomposed triazines. We successfully synthesized a serious of benzoxazines without gelatin and high yield. The structures were confirmed by 1H-NMR, and FTIR spectra.The benzoxazines with high-molecular weight exhibit high glass transition temperature, thermal stability, 5% decomposition temperature, and chair yield after thermal curing were measured by DSC,TGA,DMA,and TMA. There has the potential to the high-molecular weight benzoxazines tomorrow