LCST

(redirected from Lower Critical Solution Temperature)
AcronymDefinition
LCSTLower Critical Solution Temperature (physical chemistry)
LCSTLeicester Complementary Schools Trust (UK)
LCSTLegislative Commission on Science and Technology (New York)
LCSTLung Carcinoma with Sarcomatous Transformation
References in periodicals archive ?
Poly (N-isopropylacrylamide) is a thermoresponsive polymer having Lower Critical Solution Temperature at 32[degrees]C.
The polymer particles have a lower critical solution temperature and the polymer particles are formed at a temperature above the lower critical solution temperature.
Thermodynamics and Phase Equilibria * Introduction to free energy of mixing * Why entropy effects are small in polymers * Chemistry factors controlling miscibility * Blending principles and adhesion between polymers * Phase diagrams: lower critical solution temperature, upper critical solution temperature, generalized phase diagrams * Flory-Huggins equation * Copolymers and Blending * Copolymer representations--temperature composition plots, miscibility maps
It is well known that the homopolymer of N-isopropylacrylamide (IPAM-100) shows a lower critical solution temperature (LCST) or cloud point between 31 and 35[degrees]C (6, 8-13).
As the temperature of the solution is raised, the positive T[Delta]S term dominates the negative [Delta]H term and a critical temperature (the lower critical solution temperature or LCST) is reached at which the polymer separates from the aqueous phase.
All the copolymers, with the exception of IPAM-40, exhibited lower critical solution temperatures below 100[degrees]C.
This suggests that the blend exhibits lower critical solution temperature (LCST) behavior.
As the temperature increases, this repulsive effects decreases and blends exhibit lower critical solution temperature behavior.
However, when we have even modest differences in microstructure of the same monomer, a lower critical solution temperature (LCST) should be found.
Poly (N-isopropylacrylamide) is a well-known example of a thermo-responsive polymer which exhibits lower critical solution temperature or phase separation at about 32oC.