作者原本预期, polycarbazole因为结构上是多苯环以及杂环的结构... 理论上, 对热的安定性会比aliphatic chain来得好, 结果没想到, 加了aliphaic chain到polymer backbone上之後, 热安定性却比原本的polycarbazole好 这个结果我也觉得怪怪的= = 我没有去查polycarbozole别的文献量出的Td是多少 你可以去查看看, 我猜应该没有234度C 那麽烂吧= = 至於DSC, 加了越多的aliphatic chain Tg变低还算合理.... 但是control exp (应该没有aliphatic chain 吧?), 却没有Tg 这让我有点怀疑他的control exp聚合是不是有问题 导致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这一段文章猜的, 建议你多看看其他ref 这篇怪怪的 ※ 引述《onetotwo (展展老师~)》之铭言： : 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. : 这是从paper撷录下来的一段话 : 当5% weight loss temperature随着alkyne的数量增加而增加时 : 是不是代表着这稳定性越来越好? : 为什麽作者要用Unexpectedly? : 还有the glass transition temperature越低是不是代表热稳定性越不好? : 为什麽作者会说越低越好? : 请各位高手帮我解答 : 先谢谢大家了~ -- ◢ ▄ ▊◢▅◢▄ 我要写个惨字～～～ ▏ ◢█◣▏ ▊ ◤▅◥▍a ▏ ▄ ▏ \> < __ ▂◤ ___ o ╮_____ _ --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 220.136.208.185 ※ 编辑: klwei 来自: 220.136.208.185 (06/16 11:58)