Polymer rearrangement

The large region of yield in materials that fail by tough fracture arises as the molecules of the polymer rearrange themselves in response to the applied stress. This is different from the mechanism of yield in metals, where planes of metal atoms slide over one another. In polymers, the molecular movement... 

It is mostly used to describe the effect of temperature on the dynamics of relaxation processes in glassy polymers. Rearranging Eq. (8), we obtain the relation between the activation energy AU (in kJ) and the temperature of relaxation, Tr(f), detected at frequency f ... 

The illustrative aqueous overall cell reaction showing polymer rearrangement is... 

Parachutes, matrioshka structures, and necklaces result when the polymer phase separates from the surfactant bilayer during or after the polymerization process. Two mechanisms have been proposed to describe this phenomenon polymer rearrangement and preferential polymerization [12]. Polymer rearrangement occurs when growing or terminated polymer molecules initially dis-... 

The large region of yield in materials that fail by tough fracture arises as the molecules of the polymer rearrange themselves in... 

Regarding linear polymers, rearrangements can involve the main chain, as in the case of a polycarbonate (see Scheme 7.24), or pendant groups, as in the case of poly(4-acetoxy styrene), which is converted into poly(3-acetyl-4-hydroxy sty-... 

The nanopatteming appearance is regarded as the nanobubble decoration formed by the polymer rearranged by nanobubble interfacial forces, arising upon nanobubble expansion after mild pressure drop is applied on the interface. 

The contraphihc effect stands in contrast to the wetting behavior of other polar polymers that instead become more hydrophilic on immersion in water [74,75]. Upon exposure to water, the surface of these other polymers rearranges thereby opening paths to more polar hydrophilic moieties so that hydrophilicity often increases with time [76,77]. For these polymers, the migration of hydrophilic polar groups to the polymer surface decreases 0. ... 

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