Ring opening metathesis polymerization of triazole‐bearing cyclobutenes: Diblock copolymer synthesis and evaluation of the effect of side group size on polymerization kinetics

Ring opening metathesis polymerization of triazole‐bearing cyclobutenes: Diblock copolymer synthesis and evaluation of the effect of side group size on polymerization kinetics
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含三唑环丁烯的开环复分解聚合:二嵌段共聚物的合成以及侧基大小对聚合动力学影响的评估

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发表时间:
2017
期刊:
影响因子:
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通讯作者:
S. Granados
S. Granados
中科院分区:
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作者:
Jia Wei;William S Trout;Y. C. Simon;S. Granados

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使用第二代Grubbs催化剂(G2)经由开环易位聚合来聚合含有不同尺寸的侧基的环丁烯。聚合速率取决于连接到环丁烯环上的侧基的大小,侧链越长,聚合速率越慢,分子量分布越窄。这些新分子的聚合以一级动力学进行,与活性聚合一致。扩链实验产生多分散指数低于1.33的基于环丁烯的二嵌段共聚物。本报告中的合成方法将允许使用G2来获得新的复杂聚合物结构,其具有比源自于异戊烯类似物和环辛烯部分的那些更高密度的侧基。© 2017 Wiley Periodicals,Inc. J. Polym.科学,部分A:聚合物。Chem. 2017,55,1929-1939
Cyclobutenes containing pendant groups of varying sizes were polymerized via ring opening metathesis polymerization using Grubbs catalyst 2nd generation (G2). The rate of polymerization depended on the size of the pendant groups attached to the cyclobutene rings, with longer side-chains producing slower polymerization rates and narrower molecular weight distributions. The polymerization of these new molecules proceeded with first order kinetics, consistent with a living polymerization. Chain extension experiments produced cyclobutene-based diblock copolymers with polydispersity indices below 1.33. The synthetic methods in this report will allow the use of G2 to access new complex polymeric architectures with a higher density of pendant groups than those derived from norbornene analogs and cyclooctene moieties. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1929–1939
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