Polymer-wall

Although the properties of specific polymer/wall systems are no longer accessible, the various phase transitions of polymers in confined geometries can be treated (Fig. 1). For semi-infinite systems two distinct phase transitions occur for volume fraction 0 = 0 and chain length N oo, namely collapse in the bulk (at the theta-temperature 6 [26,27]) and adsorp-... 

Wang, S.-Q. Molecular Transitions and Dynamics at Polymer/Wall Interfaces Origins of Flow Instabilities and Wall Slip. VoL 138, pp. 227-276. 

Recently, many synthetic polymers such as urea/formalin resin, melamine/formalin resin, polyester, and polyurethane have been widely used as the wall material for the microcapsule, though the gelatin microcapsule is still used. Microcapsules using a synthetic polymer wall have several advantages over those using a gelatin wall (1) the preparation process is simple, (2) the size of the microcapsules is well balanced, (3) the microcapsule concentration can be increased twofold or more and (4) the microcapsules have a high resistance to water and many chemicals. Synthetic microcapsules are prepared by interfacial polymerization or in situ polymerization. 

Petersen et al., Petersen and Voth,i Spohr, Spohr et al., and Walbran and Kornyshev developed EVB-based models to study the effect of con-finemenf in nanometer-sized pores and fhe role of acid-functionalized polymer walls on solvation and transport of protons in PEMs. The calculations by the Voth group revealed an inhibiting effect of sulfonate ions on proton motions. The EVB model by Kornyshev, Spohr, and Walbran was specifically designed to sfudy effecfs on proton mobilify due to charge delocalization within SOg groups, side chain packing density, and fluctuations... 

Molecular Transitions and Dynamics at Polymer /Wall Interfaces ... 

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