The Effect of Temperature on the Permeability Ratio of Different Fluid Pairs in Two-Phase Systems

1969 ◽  
Vol 21 (08) ◽  
pp. 1037-1046 ◽  
Author(s):  
L.B. Davidson
Keyword(s):  
Effect Of Temperature ◽  
Permeability Ratio ◽  
Two Phase ◽  
Phase Systems

Effect of Temperature on Stress-Optical Properties of Styrene Butadiene Block Copolymers

1967 ◽  
Vol 40 (5) ◽  
pp. 1373-1380 ◽  
Author(s):  
E. Fischer ◽  
J. F. Henderson
Keyword(s):  
Optical Properties ◽  
Block Copolymers ◽  
Network Structure ◽  
Effect Of Temperature ◽  
Stress Strain ◽  
Two Phase ◽  
Phase Systems ◽  
Effective Network ◽  
Restricted Mobility ◽  
Styrene Butadiene

Abstract Stress, strain, and optical properties of three elastomeric styrene butadiene block copolymers containing 31, 40 and 49 wt per cent styrene were studied as a function of temperature. Mechanical and optical properties indicate that these materials are two phase systems in which the polybutadiene chains form an elastomeric phase and the polystyrene a glassy phase with the latter providing physical crosslinks. Birefringence measurements indicate that decreases in modulus and strength of these materials are associated with decrease in concentration of elastically effective network chains. Independence of stress-optical coefficient of temperature suggests that the decrease in concentration of elastically effective chains is not due to onset of rubberlike behavior or flow within the polystyrene regions themselves, at least for temperatures below about 70° C. Rather, the decrease seems to be associated with increased mobility of the polybutadiene chains at higher temperatures, which also leads to an increase in the rate of stress relaxation. Birefringence measured during extension and retraction showed that stress strain hysteresis is due to restricted mobility of polybutadiene chain segments rather than to permanent viscous flow or to change in the effective network structure of the block copolymers. The ultimate properties of these rubbers were well correlated with the effective network structure in undeformed specimens.

scholarly journals Phase diagrams, densities and refractive indexes of poly(ethylene oxide)+organic salts+water aqueous two-phase systems: Effect of temperature, anion and molar mass

2015 ◽  
Vol 406 ◽  
pp. 70-76 ◽  
Author(s):  
Andrés Felipe Chamorro Rengifo ◽  
Gabriel Max Dias Ferreira ◽  
Guilherme Max Dias Ferreira ◽  
Maria C. Hespanhol da Silva ◽  
Luis Henrique Mendes da Silva
Keyword(s):  
Ethylene Oxide ◽  
Phase Diagrams ◽  
Molar Mass ◽  
Effect Of Temperature ◽  
Organic Salts ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Poly Ethylene Oxide ◽  
Phase Systems ◽  
Poly Ethylene

scholarly journals Effect of Temperature on the Separation and Purification of Whey Proteins Using Aqueous Two-Phase Systems

2021 ◽  
Author(s):  
José Antônio de Queiroz Lafetá Junior ◽  
Matheus Furlan Pinheiro ◽  
Cariny Maria Polesca ◽  
Rita de Cássia Superbi ◽  
Jane Sélia dos Reis Coimbra
Keyword(s):  
Whey Proteins ◽  
Effect Of Temperature ◽  
Separation And Purification ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Continuous purification of antibodies from cell culture supernatant with aqueous two-phase systems: From concept to process

2013 ◽  
Vol 8 (3) ◽  
pp. 352-362 ◽  
Author(s):  
Paula A. J. Rosa ◽  
Ana M. Azevedo ◽  
S. Sommerfeld ◽  
Martina Mutter ◽  
Werner Bäcker ◽  
...  
Keyword(s):  
Cell Culture ◽  
Culture Supernatant ◽  
Cell Culture Supernatant ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Optimized and Scalable Green Extraction of Pristimerin, an Anticancerigen from Mortonia greggii, by Ethanol–Phosphate Aqueous Two-Phase Systems

2021 ◽  
Vol 60 (15) ◽  
pp. 5403-5410
Author(s):  
Martha Alicia González-Félix ◽  
Luis Alberto Mejía-Manzano ◽  
Bertha A. Barba-Dávila ◽  
Sergio O. Serna-Saldívar ◽  
José González-Valdez
Keyword(s):  
Two Phase ◽  
Green Extraction ◽  
Aqueous Two Phase Systems ◽  
Phase Systems
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