The further understanding of chain topology effect on the properties of single polymer in good solvent: Special behaviors of single tadpole chain
The further understanding of chain topology effect on the properties of single polymer in good solvent: Special behaviors of single tadpole chain
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链拓扑结构对单一聚合物在良溶剂中性能影响的进一步认识：蝌蚪单链的特殊行为
DOI：
10.1016/j.polymer.2008.06.045
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发表时间：
2008-08
期刊：
影响因子：
4.6
通讯作者：
Sun, Zhaoyan
中科院分区：
文献类型：
--
作者：
Fu, Cuiliu;Li, Hongfei;Tong, Zhen;An, Lijia;Sun, Zhaoyan
链的拓扑结构强烈地影响着聚合物熔体和聚合物稀溶液的静态和动态性质。对于不同的链结构，如环状和线性聚合物，分子大小和扩散行为是不同的。为了进一步了解链拓扑结构对聚合物静态和动态性能的影响，我们将重点放在由一个或多个线性尾部连接的环状链组成的蝌蚪聚合物上。研究发现，线性尾的数目和长度对蝌蚪聚合物在稀溶液中的性质都有重要影响。对于具有固定线性尾长和数目的蝌蚪聚合物，随着蝌蚪聚合物的聚合度的增加，观察到静态和动态性质从线状到环状行为的转变。通过对不同链的回转半径的研究，我们定义了线型尾中单体数（Ntail）与总聚合度（N）的比值，发现当比值Ntail/N大于0.73时，蝌蚪链表现为线型链，而当Ntail/N小于0.29时，它们表现为环状链。这一结果将有助于进一步理解链拓扑结构对聚合物稀溶液静态和动态性质的依赖性。蝌蚪聚合物在偏离类线性区之前或到达类环状区之后的行为符合Zimm理论的预期，而在中间区，蝌蚪聚合物的行为并不符合Zimm理论的预期。
Chain topology strongly affects the static and dynamic properties of polymer melts and polymers in dilute solution. For different chain architectures, such as ring and linear polymers, the molecular size and the diffusion behavior are different. To further understand the chain topology effect on the static and dynamic properties of polymers, we focus on the tadpole polymer which consists of a cyclic chain attached with one or more linear tails. It is found that both the number and the length of linear tails play important roles on the properties of the tadpole polymers in dilute solution. For the tadpole polymers with fixed linear tail length and number, with increasing the degree of polymerization of tadpole polymers, a transition from linear-like to ring-like behavior is observed for both the static and dynamic properties. By studying the radii of gyration for different chains, we define a ratio of the number of monomers in linear tails (Ntail) to the total degree of polymerization (N), and found that when the ratio Ntail/N is more than about 0.73, tadpole chains behave as linear chains, while, when Ntail/N is less than about 0.29, they behave as ring chains. This result will be helpful in further understanding of the chain topology dependence on the static and dynamic properties of polymer in dilute solution. Furthermore, the tadpole polymers behave as what Zimm theory expected before they deviate from the linear-like regime, or after they reach the ring-like regime, however, in the intermediate regime, the behavior of tadpole polymer does not show what Zimm model expected.
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影响因子：
4.6
作者：
C. Edwards;D. Rigby;R. Stepto;K. Dodgson;J. A. Semlyen
通讯作者：
C. Edwards;D. Rigby;R. Stepto;K. Dodgson;J. A. Semlyen
影响因子：
5.5
作者：
H. Oike;Akiko Uchibori;Akiko Tsuchitani;Hyunkyu Kim;Y. Tezuka
通讯作者：
H. Oike;Akiko Uchibori;Akiko Tsuchitani;Hyunkyu Kim;Y. Tezuka
影响因子：
5.5
作者：
Kahyun Hur;R. Winkler;D. Y. Yoon
通讯作者：
Kahyun Hur;R. Winkler;D. Y. Yoon
DOI：
10.1111/j.1399-3011.1991.tb01425.x
发表时间：
2009-01
期刊：
International journal of peptide and protein research
影响因子：
--
作者：
G. Flouret;W. Brieher;T. Majewski;K. Mahan;L. Wilson
通讯作者：
G. Flouret;W. Brieher;T. Majewski;K. Mahan;L. Wilson
影响因子：
4.4
作者：
ZIMM, BH;STOCKMAYER, WH
通讯作者：
STOCKMAYER, WH