A trial to clarify a cause of forming physical gels: morphology of syndiotactic polystyrene in n-alkylbenzene
A trial to clarify a cause of forming physical gels: morphology of syndiotactic polystyrene in n-alkylbenzene
复制标题
澄清物理凝胶形成原因的尝试：间规聚苯乙烯在正烷基苯中的形态
DOI：
10.1016/j.polymer.2012.09.025
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发表时间：
2012
期刊：
影响因子：
4.6
通讯作者：
and Jun Mochizuki
中科院分区：
文献类型：
--
作者：
Hideyuki Itagaki;Tomokatsu Tokami;and Jun Mochizuki
我们在高温下将低浓度间规聚苯乙烯(SPS)溶解在系列正构烷基苯(Nb：C6H5-CNH_2N+1(N=1~10))中，并用扫描电子显微镜、红外光谱、差示扫描量热仪和广角X-射线衍射仪观察了冷却后的形态和结构。Nb中SPS的形态随N的变化而变化：(I)N=1-3，SPS/Nb形成三维网状结构的凝胶，(Ii)Nb=N4-6，SPS/Nb产生糊状态，具有21螺旋构象的SPS链聚集在一起形成SPSγ晶相，以及(Iii)Nb=N7-10，SPS/Nb产生果子露状态，具有反之字形构象的SPS链聚集在一起形成SPSβ晶相。讨论了SPS形成物理凝胶的原因以及SPS/Nb形态依赖于N的原因。
We dissolved low concentration of syndiotactic polystyrene (SPS) in serial n-alkylbenzenes (NB: C6H5–CNH2N+1(N = 1–10)) at high temperatures and observed the morphology and structure after cooling by SEM, IR, DSC, and WAXD. The morphology of SPS in NB changes with N: (I) N = 1–3, SPS/NB forms a gel with fibril structure networking three-dimensionally, (II) N = 4–6, SPS/NB produces paste-like state where SPS chains with 21-helix conformation gather together to form SPS γ crystalline phase, and (III) N = 7–10, SPS/NB produces sherbet-like state where SPS chains with trans zigzag conformation gather together to form SPS β crystalline phase. We have discussed a cause of forming physical gels of SPS together with the reason why the morphology of SPS/NB depends on N.