Effect of supercritical carbon dioxide on ultradispersed polytetrafluoroethylene

被引：11

作者：

Vopilov, Yu. E. ^{[1
,2
]}

Nikitin, L. N. ^{[2
]}

Yurkov, G. Yu. ^{[3
]}

Kharitonova, E. P. ^{[1
]}

Khokhlov, A. R. ^{[1
,2
]}

Bouznik, V. M. ^{[3
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia

[2] Russian Acad Sci, Nesmeyanov Inst Organoelement Chem, Moscow 119991, Russia

[3] Russian Acad Sci, Baikov Inst Met, Moscow 119991, Russia

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2012年 / 62卷

基金：

俄罗斯基础研究基金会;

关键词：

Ultradispersed polytetrafluoroethylene; Supercritical carbon dioxide; Solubility; Structure and properties of ultradispersed polytetrafluoroethylene; RAY-POWDER DIFFRACTION; PRODUCTS; FORMS;

D O I：

10.1016/j.supflu.2011.11.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The morphology and structure of ultradispersed polytetrafluoroethylene (UPTFE, FORUM trademark) samples after treatment with supercritical carbon dioxide (sc-CO2) were studied by physicochemical methods. It was shown that, in sc-CO2, low-molecular-weight fractions are dissolved and removed from pristine UFTFE. The structures of separated fractions were studied. With an increase in the dissolving power of sc-CO2 (by increasing pressure and varying temperature), the fractionation process gradually involves oligomers with higher molecular weights. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：204 / 210

页数：7

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