A combined small-angle neutron and X-ray scattering study of block copolymers micellisation in supercritical carbon dioxide

被引：8
|
作者：
Lo Celso, F
Triolo, A
Triolo, F
Thiyagarajan, P
Amenitsch, H
Steinhart, M
Kriechbaum, M
DeSimone, JM
Triolo, R
机构：
[1] Univ Palermo, Dipartimento Chim Fis F Accascina, I-90128 Palermo, Italy
[2] CNR, IPCF, Messina, Italy
[3] Mt Sinai Sch Med, New York, NY USA
[4] ANL, IPNS, Argonne, IL USA
[5] Sincrotrone Elettra, Trieste, Italy
[6] Acad Sci Czech Republ, Inst Macromol Chem, Prague, Czech Republic
[7] Austrian Acad Sci, Inst Biophys & Xray Struct Res, Graz, Austria
[8] UNC, Chapel Hill, NC USA
来源：
JOURNAL OF APPLIED CRYSTALLOGRAPHY | 2003年 / 36卷
关键词：
block copolymers; micellization; aggregation;
D O I：
10.1107/S0021889803003959
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Small angle neutron and X-ray scattering (SANS and SAXS) are used to investigate the monomer-aggregate transition of fluorocarbon hydrocarbon diblock copolymers in supercritical carbon dioxide. SANS data are analyzed using a polydisperse sphere core-shell model. Synchrotron SAXS data have been collected by profiling the pressure at different temperatures, and critical micellization densities have been obtained for a series of diblock solutions. Finally pressure jump experiments, combined with synchrotron SAXS, have revealed two steps in the dynamics of the formation of the aggregates.
引用
收藏
页码：660 / 663
页数：4
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