Synthesis and characterization of dumbbell-shaped polystyrene
Synthesis and characterization of dumbbell-shaped polystyrene
复制标题
哑铃型聚苯乙烯的合成与表征
DOI：
10.1016/j.polymer.2016.10.037
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发表时间：
2016
期刊：
影响因子：
4.6
通讯作者：
Y. Matsushita
中科院分区：
文献类型：
--
作者：
Y. Doi;A. Takano;Y. Matsushita
通过在具有两个二苯基乙烯（DPE）型乙烯基的高度纯化的环状PS（R-30;Mw= 33.7kg/mol）和双官能活性线性PS（L-80;Mw= 84.0kg/mol）之间的偶联反应，阴离子合成哑铃形聚苯乙烯（PS）样品，其中环连接在线性链的两端。确认所获得的粗偶联产物除了作为副产物的未反应的L-80和R-30以及单尾蝌蚪聚合物之外还包括目标哑铃聚合物。为了分离哑铃聚合物，进行了连续的尺寸排阻色谱（SEC）和相互作用色谱（IC）分级。发现具有足够高纯度（99.9%）的哑铃链（D-30/80/30;Mw= 147 kg/mol）与具有IC模式中的单尾的蝌蚪聚合物分离，这仅仅是由于它们的链结构的小差异，即，在线性链的一个或两个链端上存在小环。这是首次成功制备高分子量、高纯度哑铃形聚合物的报道，该产品必须适合于精确物理性质的研究。
A dumbbell-shaped polystyrene (PS) sample, where rings are attached on both ends of a linear chain, was anionically synthesized by a coupling reaction between highly-purified ring PS (R-30;Mw= 33.7 kg/mol) with two diphenylethylene (DPE) type vinyl groups and bifunctional living linear PS (L-80;Mw= 84.0 kg/mol). The crude coupling product obtained was confirmed to include a targeted dumbbell polymer in addition to unreacted L-80 and R-30, and a single-tail tadpole polymer as byproducts. To isolate the dumbbell polymer, successive size-exclusion chromatography (SEC) and interaction chromatography (IC) fractionations were performed. It was found out that the dumbbell chain (D-30/80/30;Mw= 147 kg/mol) with sufficiently high purity (99.9%) was separated from the tadpole polymer with a single-tail in IC mode just due to a small difference in their chain architectures, i.e., the presence of the small rings on either one or both chain ends of a linear chain. This is the first report on successful preparation of a dumbbell-shaped polymer with high molecular weight and high purity, and the present product must be suitable for investigation of accurate physical properties.
影响因子：
41.2
作者：
Kapnistos M;Lang M;Vlassopoulos D;Pyckhout-Hintzen W;Richter D;Cho D;Chang T;Rubinstein M
通讯作者：
Rubinstein M
影响因子：
7.015
作者：
Pasquino R;Vasilakopoulos TC;Jeong YC;Lee H;Rogers S;Sakellariou G;Allgaier J;Takano A;Brás AR;Chang T;Gooßen S;Pyckhout-Hintzen W;Wischnewski A;Hadjichristidis N;Richter D;Rubinstein M;Vlassopoulos D
通讯作者：
Vlassopoulos D
影响因子：
3.4
作者：
Bras, Ana R.;Pasquino, Rossana;Richter, Dieter
通讯作者：
Richter, Dieter