An "endless" route to cyclic polymers
An "endless" route to cyclic polymers
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DOI：
10.1126/science.1075401
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发表时间：
2002-09-20
期刊：
影响因子：
56.9
通讯作者：
Grubbs, RH
中科院分区：
文献类型：
--
作者：
Bielawski, CW;Benitez, D;Grubbs, RH
已经开发出一种新的环状聚合物合成路线，其中生长的聚合物链的末端在整个聚合过程中保持连接到金属配合物上。该方法消除了对线性聚合物前体和高稀释度的需要，这是传统大环化策略的缺点，并且它有效地消除了生产大量纯环状材料的障碍。最终，该策略提供了一种独特的大分子支架，可用于满足商业聚合物新应用日益增长的需求。作为其潜在用途的证明，制备环状聚乙烯，并发现其表现出与其线性类似物不同的各种物理性质。
A new synthetic route to cyclic polymers has been developed in which the ends of growing polymer chains remain attached to a metal complex throughout the entire polymerization process. The approach eliminates the need for linear polymeric precursors and high dilution, drawbacks of traditional macrocyclization strategies, and it effectively removes the barrier to producing large quantities of pure cyclic material. Ultimately, the strategy offers facile access to a unique macromolecular scaffold that may be used to meet the increasing demand of new applications for commercial polymers. As a demonstration of its potential utility, cyclic polyethylenes were prepared and found to exhibit a variety of physical properties that were distinguishable from their linear analogs.