作者原本預期, polycarbazole因為結構上是多苯環以及雜環的結構... 理論上, 對熱的安定性會比aliphatic chain來得好, 結果沒想到, 加了aliphaic chain到polymer backbone上之後, 熱安定性卻比原本的polycarbazole好 這個結果我也覺得怪怪的= = 我沒有去查polycarbozole別的文獻量出的Td是多少 你可以去查看看, 我猜應該沒有234度C 那麼爛吧= = 至於DSC, 加了越多的aliphatic chain Tg變低還算合理.... 但是control exp (應該沒有aliphatic chain 吧?), 卻沒有Tg 這讓我有點懷疑他的control exp聚合是不是有問題 導致Mw太小, 所以他的TGA 可以看到很多段的裂解... 以上都是用你COPY這一段文章猜的, 建議你多看看其他ref 這篇怪怪的 ※ 引述《onetotwo (展展老師~)》之銘言： : To reveal the relationship between the alkyne content : and the thermal stability, thermogravimetric analysis (TGA) : and differential scanning calorimetry (DSC) measurements : of P1, P2, and P3 were performed at the scanning rate of : 10C min-1 under flowing nitrogen. Unexpectedly, the : decomposition temperature increased with the increasing : alkyne content. Thus, the 5% weight loss temperature : increased in the order of P1 (234)< P2 (320)< P3(375). : Decomposition of P1 proceeded in two or three steps, whereas : P2 and P3 showed single main decompositions . The DSC : measurement of P1 did not show any transitions in the : range from -50 to 200,whereas the glass transition temperature : of P2 and P3 clearly appeared at 80 and 67 ,respectivel. : Thus, it was demonstrated that alkyne spacers serve as an : important component to improve the thermal properties of : the poly(1,8-carbazole)s. : 這是從paper擷錄下來的一段話 : 當5% weight loss temperature隨著alkyne的數量增加而增加時 : 是不是代表著這穩定性越來越好? : 為什麼作者要用Unexpectedly? : 還有the glass transition temperature越低是不是代表熱穩定性越不好? : 為什麼作者會說越低越好? : 請各位高手幫我解答 : 先謝謝大家了~ -- ◢ ▄ ▊◢▅◢▄ 我要寫個慘字～～～ ▏ ◢█◣▏ ▊ ◤▅◥▍a ▏ ▄ ▏ \> < __ ▂◤ ___ o ╮_____ _ --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 220.136.208.185 ※ 編輯: klwei 來自: 220.136.208.185 (06/16 11:58)