Mechanically Interlocked Structure of Polyrotaxane Investigated by Contrast Variation Small-Angle Neutron Scattering

被引：22

作者：

Mayumi, Koichi ^{[1
]}

Endo, Hitoshi ^{[2
]}

Osaka, Noboru ^{[2
]}

Yokoyama, Hideaki ^{[1
]}

Nagao, Michihiro ^{[3
,4
]}

Shibayama, Mitsuhiro ^{[2
]}

Ito, Kohzo ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Frontier Sci, Chiba 2778561, Japan

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[3] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA

来源：

MACROMOLECULES | 2009年 / 42卷 / 16期

关键词：

CYCLODEXTRIN; POLYMER; SANS;

D O I：

10.1021/ma9010318

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The detailed structure of polyrotaxane (PR) in solution by using contrast variation small-angle neutron scattering (SANS) was investigated. The scattering function of PR was decomposed into partial scattering functions of polyethylene glycol (PEG) and α-cyclodextrins (CD) and the conformation of PEG in PR and the spatial distribution of CDs on PEG was determined. The results show that the scattering curves of d-PR are convex downward, while those of h-PR are convex upward. It is also found that the volume fraction of CD in a PR is 2.4 times as larger as that of PEG. The cross-term for PR is positive and has a magnitude between the magnitudes of the self-terms. The findings obtained by SANS with contrast variation are found to be the first evidence of CDs in PR dispersed randomly along the chain in solution.

引用

页码：6327 / 6329

页数：3

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