PHASE-BEHAVIOR OF TELECHELIC POLYISOBUTYLENE IN SUBCRITICAL AND SUPERCRITICAL FLUIDS .3. 3-ARM-STAR PIB-(4K) AS A MODEL TRIMER FOR MONOHYDROXY AND DIHYDROXY PIB-(1K) IN ETHANE, PROPANE, DIMETHYL ETHER, CARBON-DIOXIDE, AND CHLORODIFLUOROMETHANE

Authors
GREGG CJ STEIN FP RADOSZ M
Citation
Cj. Gregg et al., PHASE-BEHAVIOR OF TELECHELIC POLYISOBUTYLENE IN SUBCRITICAL AND SUPERCRITICAL FLUIDS .3. 3-ARM-STAR PIB-(4K) AS A MODEL TRIMER FOR MONOHYDROXY AND DIHYDROXY PIB-(1K) IN ETHANE, PROPANE, DIMETHYL ETHER, CARBON-DIOXIDE, AND CHLORODIFLUOROMETHANE, Journal of physical chemistry, 98(41), 1994, pp. 10634-10639
Citations number
28
Categorie Soggetti
Chemistry Physical
Journal title
Journal of physical chemistry → ACNP
ISSN journal
00223654
Volume
98
Issue
41
Year of publication
1994
Pages
10634 - 10639
Database
ISI
SICI code
0022-3654(1994)98:41<10634:POTPIS>2.0.ZU;2-E
Abstract
The cloud-point pressures for a three-arm-star polyisobutylene (4K) in ethane, propane, dimethyl ether, carbon dioxide, and chlorodifluorome thane were measured in a variable volume optical cell up to 200 degree s C and 2000 bar. These pressures, presented as LCST and U-LCST curves , are found to depend strongly on the size difference and polarity dif ference between solvent and polymer. The cloud points measured in this work confirm the aggregate size estimated from the statistical associ ating fluid theory (SAFT) for CH3-PIB-OH (1K) and HO-PIB-OH (1K).