Polyelectrolyte charged linear

This type of polymers called polyelectrolytes are linear macromolecule chains containing a large number of charged or chargeable groups which, in a polar solvent like water, dissociate into charges associated to the polymer backbone and... 

A study of the IPECs formed by polyelectrolyte brushes and oppositely charged linear polyelectrolytes has also been carried out [154,155], Recent simulation work indicated that formation of IPECs with linear polyelectrolytes can also induce the collapse of the brushes [156], Our experimental work [157] concerning the IPECs between PMETAI brushes and linear polystyrene sulfonate) (PSS) is in agreement with these simulations. 

In the absence of a cooperative conformational transition, for many polysaccharide polyelectrolytes a linear dependence of [rj] upon I Ms observed, with the slope diminishing with the charge density associated to the polysaccharide chain (Figure 12.2.13). A theory has been presented for an estimation of the relative stiffness of the molecular chains by Smidsrod and Haug, which is based on the Fixman s theory and Mark-Houwink equation. The chain stiffness parameter is estimated from the normalized slope B of [r ] vs. the inverse square root of the ionic strength ... 

Xu Y, Borisov OV, Ballauff M, Muller AHE (2010) Manipulating the morphologies of cylindrical polyelectrolyte bmshes by forming interpolyelectrolyte complexes with oppositely charged linear polyelectrolytes an AFM study. Langmuir 26(10) 6919-6926... 

Fig. 2 Structure of water-soluble nonstoicbiomebic IPECs formed by oppositely charged linear polyelectrolytes with DPhpe >> DPgpe [31, 32]...

Fig. 3 Behavior of mixtures of oppositely charged linear polyelectrolytes with DPhpe > > DPqpe upon an increasing content of GPE. Z=[GPE]/[HPE]. For descriptions of regions A, B, and C, see text...

The sphere model which has a rather historical interest could nevertheless perhaps provide an approximation for some stiff biocolloids or approach the behaviour of low charged linear polyelectrolytes despite the crude choice of a uniform charge density inside the sphere. 

The polyelectrolyte chain is often assumed to be a rigid cylinder (at least locally) with a uniform surface charge distribution [33-36], On the basis of this assumption the non-linearized Poisson-Boltzmann (PB) equation can be used to calculate how the electrostatic potential

[Pg.55]

In polyelectrolyte solutions, the counterion condensation on linear polyelectrolyte chains is known to occur when the charge density along the chain exceeds the critical value [40]. Our work indicates the existence of a critical value for the separation distance between chains, where the interchain interaction changes drastically, most likely due to the transition in the binding mode of the counterions (see Fig. 13). Many peculiar forms of behavior, which are often interpreted by the cluster formation or the interchain organization of polyelectrolytes, have been reported for high concentrations of aqueous polyelectrolytes... 

Adsorbance of NaPSS, Ap. Hesselink (1, 2) derived a linear relationship between the amount of polyelectrolyte adsorbed in the plateau region on an adsorbent with zero surface charge and the square root of added salt concentration in bulk solution. 

---