Industrial applications of the aggregation of block copolymers in supercritical CO2: a SANS study

被引：0

作者：

F. Lo Celso

A. Triolo

F. Triolo

J. McClain

J.M. Desimone

R.K. Heenan

H. Amenitsch

R. Triolo

机构：

[1] University of Palermo,

[2] Department of Physical Chemistry,undefined

[3] viale delle Scienze,undefined

[4] 90128 Palermo,undefined

[5] Italy,undefined

[6] HMI-BENSC,undefined

[7] 14109 Berlin,undefined

[8] Germany,undefined

[9] Mount Sinai School of Medicine,undefined

[10] New York,undefined

[11] NY 10029,undefined

[12] USA,undefined

[13] Department of Chemistry,undefined

[14] University of North Carolina,undefined

[15] Chapel Hill,undefined

[16] NC 27599-3290,undefined

[17] USA,undefined

[18] Rutherford Appleton Laboratory,undefined

[19] Chilton OX11 0QX,undefined

[20] UK,undefined

[21] Sincrotrone Elettra,undefined

[22] 34012 Trieste,undefined

[23] Italy,undefined

来源：

Applied Physics A | 2002年 / 74卷

关键词：

PACS: 61.12.Ex; 61.25.Hq; 64.75.+g;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Industrial applications of supercritical carbon dioxide (scCO2) rely upon the rather selective and easily adjustable solvent ability of CO2. CO2 near the critical point is a poor solvent for high molecular weight (HMW) hydrocarbon polymers, while it is a very good solvent for amorphous fluorinated polymers. By increasing the pressure, CO2 becomes a good solvent even for HMW hydrogenated chains. Specially engineered amphiphilic di-block copolymers, with CO2-philic and CO2-phobic portions, are expected to undergo trough a monomer–aggregate transition when the solvent density of the scCO2 changes. Here small-angle neutron scattering (SANS) results are reported for a block copolymer dissolved in liquid and supercritical CO2. Time-resolved small-angle X-ray scattering (TR-SAXS) results are also reported.

引用

页码：s1427 / s1429

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