DISSOLVING PERFLUOROPOLYMERS IN SUPERCRITICAL CARBON-DIOXIDE

被引：85

作者：

TUMINELLO, WH ^{[1
]}

DEE, GT ^{[1
]}

MCHUGH, MA ^{[1
]}

机构：

[1] JOHNS HOPKINS UNIV,DEPT CHEM ENGN,BALTIMORE,MD 21218

来源：

MACROMOLECULES | 1995年 / 28卷 / 05期

关键词：

D O I：

10.1021/ma00109a023

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A copolymer of TFE (tetrafluoroethylene) and HFP (hexafluoropropylene) was dissolved in supercritical (SC) CO2 at about 200 degrees C and 100 MPa. The copolymer contained 19.3 mol % HFP and had an ultimate melting point of 200 degrees C. Theoretical predictions for phase diagrams of CO2 with TFE homo- and copolymers indicate solubility at greater than or equal to 100 MPa for all systems. The temperature requirements for solubility are about 300 degrees C and greater for PTFE [poly(tetrafluoroethylene)], with lower temperatures required for the copolymers. The experimental results for the low-melting HFP copolymers are reasonably consistent with these phase diagrams, leading us to believe that PTFE should be soluble near the predicted conditions.

引用

页码：1506 / 1510

页数：5

共 20 条

[1] ANGUS S, 1976, INT THERMODYNAMIC TA
[2] [Anonymous], 1962, REGULAR SOLUTIONS
[3] BARROW GM, 1966, PHYSICAL CHEM
[4] LIGHT-SCATTERING CHARACTERIZATION OF AN ALTERNATING COPOLYMER OF ETHYLENE AND TETRAFLUOROETHYLENE .3. TEMPERATURE BEHAVIOR OF POLYMER SIZE
CHU, B
WU, C
BUCK, W
[J]. MACROMOLECULES, 1989, 22 (01) : 371 - 374
[5] SYNTHESIS OF FLUOROPOLYMERS IN SUPERCRITICAL CARBON-DIOXIDE
DESIMONE, JM
GUAN, Z
ELSBERND, CS
[J]. SCIENCE, 1992, 257 (5072) : 945 - 947
[6] ENICK RM, COMMUNICATION
[7] STATISTICAL THERMODYNAMICS OF CHAIN MOLECULE LIQUIDS .I. EQUATION OF STATE FOR NORMAL PARAFFIN HYDROCARBONS
FLORY, PJ
ORWOLL, RA
VRIJ, A
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1964, 86 (17) : 3507 - +
[8] FLORY PJ, 1953, PRINCIPLES POLYM CHE, P568
[9] GRULKE E, 1989, POLYM HDB
[10] GEL FORMATION IN CARBON-DIOXIDE SEMIFLUORINATED ALKANE MIXTURES AND PHASE-EQUILIBRIA OF A CARBON-DIOXIDE PERFLUORINATED ALKANE MIXTURE
IEZZI, A
BENDALE, P
ENICK, RM
TURBERG, M
BRADY, J
[J]. FLUID PHASE EQUILIBRIA, 1989, 52 : 307 - 317

← 1 2 →