Influence of the Solvent Quality on Ring Polymer Dimensions

被引：48

作者：

Goossen, Sebastian ^{[1
]}

Bras, Ana R. ^{[1
]}

Pyckhout-Hintzen, Wim ^{[1
]}

Wischnewski, Andreas ^{[1
]}

Richter, Dieter ^{[1
]}

Rubinstein, Michael ^{[2
]}

Roovers, Jacques ^{[3
]}

Lutz, Pierre J. ^{[4
]}

Jeong, Youncheol ^{[5
,6
]}

Chang, Taihyun ^{[5
,6
]}

Vlassopoulos, Dimitris ^{[7
,8
]}

机构：

[1] Forschungszentrum Julich, D-52425 Julich, Germany

[2] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

[3] Natl Res Council Canada, Inst Environm Chem, Ottawa, ON, Canada

[4] Univ Strasbourg, CNRS UPR 22, Inst Charles Sadron, F-67034 Strasbourg, France

[5] Pohang Univ Sci & Technol, Div Adv Mat Sci, Pohang 790784, South Korea

[6] Pohang Univ Sci & Technol, Dept Chem, Pohang 790784, South Korea

[7] Fdn Res & Technol Hellas FORTH, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece

[8] Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Crete, Greece

来源：

MACROMOLECULES | 2015年 / 48卷 / 05期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

THERMODYNAMIC PROPERTIES; CHROMOSOME TERRITORIES; POLYSTYRENES; DYNAMICS; MELTS; MODEL;

D O I：

10.1021/ma502518p

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We present a systematic investigation of well-characterized, experimentally pure polystyrene (PS) rings with Molar mass of 161 000 g/mol in dilute solutions. We measure the ring than factor at theta- and good-solvent conditions as well as in a polymeric solvent (linear PS of roughly comparable molar mass) by means,of small-angle neutron scattering -(SANS). Additional dynamic light scattering (DLS) measurements support the SANS data and help elucidate the role of solvent quality and solution preparation. The results indicate the increase of ring dimensions as the solvent quality improves. Furthermore, the experimental form factors in both theta-solvent and linear matrix behave as ideal rings and are fully superimposable. The nearly Gaussian conformations of rings in a, melt of linear chains provide evidence of threading of linear chains through rings. The latter result has implications for the dynamics of ring linear polymer mixtures.

引用

页码：1598 / 1605

页数：8

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