Evidence and Limits of Universal Topological Surface Segregation of Cyclic Polymers

被引：11

作者：

He, Qiming ^{[1
]}

Wang, Shih-Fan ^{[1
]}

Hu, Renfeng ^{[5
,6
]}

Akgun, Bulent ^{[2
,3
,4
]}

Tormey, Caleb ^{[5
,6
]}

Peri, Somesh ^{[1
]}

Wu, David T. ^{[5
,6
]}

Foster, Mark D. ^{[1
]}

机构：

[1] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA

[2] Bogazici Univ, Dept Chem, TR-34342 Istanbul, Turkey

[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[5] Colorado Sch Mines, Dept Chem Engn, Golden, CO 80401 USA

[6] Colorado Sch Mines, Dept Chem, Golden, CO 80401 USA

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 16期

关键词：

RING POLYMER; MOLECULAR-WEIGHT; LINEAR-POLYMERS; FILM THICKNESS; BLENDS; POLYSTYRENES; ENRICHMENT; FIELD; SIMULATION; COPOLYMERS;

D O I：

10.1103/PhysRevLett.118.167801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

If you mix lines and circles, what happens at the edge of the mixture? The problem is simply stated, but the answer is not obvious. Twenty years ago it was proposed that a universal topological driving force would drive cyclic chains to enrich the surface of blends of linear and cyclic chains. Here such behavior is demonstrated experimentally for sufficiently long chains and the limit in molecular weight where packing effects dominate over the topological driving force is identified.

引用

页数：5

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