New Structure of Polyureas : Synthesis and Physical Studies

[[abstract]]本論文以三聚氯氰 (2,4,6-Trichloro-[1,3,5]triazine)為主體，以哌嗪（piperazine）為連接基，以簡易的步驟合成出帶有不同官能基之新結構單體 (R=二辛氨,二己氨,二己氨,苯己氨)，並以此新結構單體與二異氰酸在室溫下以簡單有效的方式進行聚合反應，聚合成兩系列之熱固性聚脲高分子，其中包括M系列(MDI 4,4’-methylenebis(phenylisocyanato)、P系列(PDI 1,4-Phenylene- diisocyanato)。 我們利用不同的側鏈官能基之單體去合成出帶有不同側鏈官能基之聚脲高分子並探討在不同官能基時聚脲高分子在熱性質、溶解度、化學抵抗性…等各種性質的差異，由實驗結果得知，此兩系列聚脲高分子皆有不錯的成膜性，並經由熱重分析儀去測量，發現有不錯的熱穩定性 (350℃)，此聚脲高分子薄膜也都有相當好的可繞性，以及在 350 nm以上的可見光範圍有很好的穿透度，且此兩系列聚脲高分子對極性非質子溶劑皆有不錯的溶解性，並且可在酸性環境下(PH<3)被分解。我們可以選擇不同的官能基，改變其性質，希望它的透明性、熱穩定性以及可被分解性可以有效的被應用於塗層方面。[[abstract]]This thesis is to report the synthesis of a new structure monomer, (2,4,6-Trichloro- [ 1,,3,5 ] triazine) as a main part and piperazine as connects unit. We use a effective method to synthesis monomers including various functional group (R= dioctylamine, dihexylamine, dibutylamine, hexylaniline). Two seriers polyureas, M serier, P serier are simply and effectively synthesized in this thesis under the room temperature. A good quality of film from the polyureas was obtained and all of films have good transmittance Above 350nm visible light scope and were flexible. They show good thermostability by Thermogravimetric Analysis (TGA) and Thermal Analyizes (TMA).They start to decompose at 300 ℃ and have softting temperature (Ts) at 150 ℃. They will decompose under acidic condition (PH