Entropy self-polymerization

Since the polymeric chains unlike to the common molecules possess by free energy of the conformation F (or by negative entropy of conformation which is a measure of polymeric chains self-organization [13]), it should be included as an additional term in usual determination of chemical potential of component of the solution. Hence, we have for the macromolecules... 

If not only geometric, but also thermodynamic parameters are taken into consideration, the difference between the self-assembly of polymeric amphiphiles compared to low molecular weight surfactants is even more pronounced. The two major contributions to the free energy of the system are 1) the loss of entropy when flexible parts of the amphiphile are enforced in the restricted environment of the aggregates, and 2) the interfacial energy... 

Noncovalent self-assembly of complementary pairs of homoditopic building blocks (AA/BB-type), such as bis(crown ether) 125 and diammonium salt 126, has afforded well-defined supramolecular oligomeric/polymeric assemblies <2003JA3522>. In dilute solutions, entropy favored the formation of the cyclic dimer, whereas high equimolar concentration (>0.5 M) of the two components led almost exclusively to linear species aggregation, as revealed by H NMR analysis and viscosity measurements. Closely related linear poly[3]pseudorotaxane supramolecular arrays have also been prepared from cylindrical bis(crown ether) 127 and bisparaquat derivative 128 <2005CC1696>. 

Liquid crystalline elastomers (LCEs) are materials that combine the properties of polymeric elastomers (entropy elasticity) with those of liquid crystals (self-organi-zation). They are the subject of several reviews and books [1-10]. Their most interesting property is the ability to change their shape reversibly after the application of a certain external stimulus. This feature was predicted by de Gennes as early... 

In general, polymeric mixtures are far less miscible than mixtures of small molecule materials. This effect results from the fact that the driving force for mixing is usually entropy, not interaction energy. In other words, miscible materials usually form a solution not because their interaction with each other is more favorable than their self-interaction, but because of an increase in entropy and hence free energy associated with increasing the amount of volume available to each component. This increase in entropy scales with the number of particles (or moles) being mixed. 

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