Bubble and cloud points of the system poly(L-lactic acid) plus carbon dioxide plus dichloromethane

被引：13

作者：

Kalogiannis, CG ^{[1
]}

Panayiotou, CG ^{[1
]}

机构：

[1] Aristotle Univ Thessaloniki, Dept Chem Engn, Thessaloniki 54124, Greece

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2005年 / 50卷 / 04期

关键词：

D O I：

10.1021/je050100q

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experimental data for the phase behavior of poly(L-lactic acid) (PLA) in mixtures of dichloromethane and carbon dioxide over a range of external conditions are presented. Cloud point pressures were measured using a variable-volume view cell as functions of temperature, dichloromethane-to-carbon dioxide ratio, and concentration of PLA. A high-molecular-weight (M-w 189 000) PLA was used in all studies and at mass fractions of 0.01, 0.02, and 0.03. For adequate control of the carbon dioxide-to-dichloromethane ratio, a new experimental procedure was employed that allows for good control of the composition. To ascertain the validity of the new experimental procedure, the binary system of carbon dioxide + dichloromethane was studied, and its results were compared to literature values.

引用

页码：1442 / 1447

页数：6

共 13 条

[1] Separations and material processing in solutions with dense gases [J].

Bungert, B ;

Sadowski, G ;

Arlt, W .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1998, 37 (08) :3208-3220

[2] Production of protein-loaded polymeric microcapsules by compressed CO2 in a mixed solvent [J].

Elvassore, N ;

Bertucco, A ;

Caliceti, P .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2001, 40 (03) :795-800

[3] Phase behavior of poly(L-lactide) in supercritical mixtures of dichloromethane and carbon dioxide [J].

Lee, BC ;

Kuk, YM .

JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2002, 47 (02) :367-370

[4] Cloud points of biodegradable polymers in compressed liquid and supercritical chlorodifluoromethane [J].

Lee, JM ;

Lee, BC ;

Lee, SH .

JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2000, 45 (05) :851-856

[5] EFFECT OF COPOLYMER COMPOSITION ON THE PHASE-BEHAVIOR OF MIXTURES OF POLY(ETHYLENE-CO-METHYL ACRYLATE) WITH PROPANE AND CHLORODIFLUOROMETHANE [J].

MEILCHEN, MA ;

HASCH, BM ;

MCHUGH, MA .

MACROMOLECULES, 1991, 24 (17) :4874-4882

[6] The effect of initial drop size on particle size in the supercritical antisolvent precipitation (SAS) technique [J].

Rantakylä, M ;

Jäntti, M ;

Aaltonen, O ;

Hurme, M .

JOURNAL OF SUPERCRITICAL FLUIDS, 2002, 24 (03) :251-263

[7] Breakthrough curves and adsorption isotherms of terpene mixtures in supercritical carbon dioxide [J].

Subra, P ;

Vega-Bancel, A ;

Reverchon, E .

JOURNAL OF SUPERCRITICAL FLUIDS, 1998, 12 (01) :43-57

[8] Powders elaboration in supercritical media: comparison with conventional routes [J].

Subra, P ;

Jestin, P .

POWDER TECHNOLOGY, 1999, 103 (01) :2-9

[9] Controlled release system formed by supercritical anti-solvent coprecipitation of a herbicide and a biodegradable polymer [J].

Taki, S ;

Badens, E ;

Charbit, G .

JOURNAL OF SUPERCRITICAL FLUIDS, 2001, 21 (01) :61-70

[10] Phase compositions and saturated densities for the binary systems of carbon dioxide with ethanol and dichloromethane [J].

Tsivintzelis, I ;

Missopolinou, D ;

Kalogiannis, K ;

Panayiotou, C .

FLUID PHASE EQUILIBRIA, 2004, 224 (01) :89-96

← 1 2 →