Intramolecular segregation

The MD-predicted intramolecular segregation of the arms of the star-shaped PE into two populations (collapsed and extended ones) provides an explanation for the experimentally observed absence of a dependence (or relatively weak dependence) of the hydrodynamic size of the IPEC species on the number of incorporated chains of the linear PE. 

An important inherent feature of IPECs comprising branched HPEs is the intramolecular segregation of its branches a certain fraction of the branches whose charge is compensated by chains of the linear GPE is nearly completely embedded into the complex coacervate domains, whereas other branches that are virtually free of linear GPE chains form the hydrated corona. 

Fig. 5 Fluorescence image of a typical single T4DNA chain, showing intramolecular segregation between unfolded and compacted parts at [CTAB] = 0.137 M and [NaBr] =0.35 M (A) and the corresponding light-intensity distribution (B)...

The disordered arrangement of the globuh and worm-hke species in combination with their uniform shape and diameter of 50 A demonstrates that the intramolecular self-assembly did not depend on intermolecular ordering. For both types of particles, the monolayer thickness was similar to the lateral diameter of the particles d = 50 5A. The topographic contrast of the images in Fig. 6 was enabled by strong molecular segregation and weak interpenetration of the particles. 

In order to segregate the /nfermolecular electron transfer from the intramolecular electron-transfer processes in Fc+-ZnP-H2P-C6o , electron spin reso-... 

Consider a regular segregated stack, i.e., one of regularly spaced identical molecules. Corresponding to each intramolecular mode, the system possesses one... 

As already discussed in the case of blends of P3HT and PCBM, the morphology of the film dramatically affects the device performance. Particularly, the limited miscibility of the two components in the biphasic system can lead to the formation of clusters of fullerene, which may increase intramolecular charge recombination and limit efficiency of electron transport [427,428], An elegant solution to this phase segregation consists in the covalent fixation of the Ceo group on the PT backbone [429,430]. 

The polymer-based miscible systems can be either intermolecular mixtures, for instance polymer solutions and blends, or intramolecular mixtures, such as block copolymers, star-shape multi-arm copolymers, grafted copolymers, random copolymers, and gradient copolymers with a composition gradient from one chain end to the other. Polymer-based miscible systems can phase separate into segregated phases with stable interfaces, or crystallize into crystalline ordered phases. In other words, there are two types of phase transitions, phase separation and crystallization. Under proper thermodynamic conditions, two phase transitions may occur simultaneously. The interplay of these two transitions will dictate the final morphology of the system. In the following, we will choose polymer solutions as typical examples to introduce the polymer-based miscible systems. 

Abstract. We review how the nucleation mechanism of polymer crystallization could be assigned to intramolecular processes and what are the preliminary benefits for understanding some fundamental crystallization behaviors. The speculative concept of molecular nucleation and the theoretical model of intramolecular nucleation have been elucidated in a broad context of classical nucleation theory. The focus is on explaining the phenomenon of molecular segregation caused by polymer crystal growth. 

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