Zeta Potential of Polycation Layers Grafted onto a Film Surface

Studies of concentration dependences of phase transition temperatures of amine-containing (meth)acrylic copolymers in aqueous solutions

“…In the field of low molecular weights ranging from 1450 to 53000, an increase in M n gives rise to a significant decrease in the LCST param eter of polymers from 46.4 down to 32.2°C. As was found in [14], a significant decrease (within 10°C) is observed also in the T pht value upon an increase in M n of PDMAEM from 120000 up to 200000. However, further increase in the molecular weight up to 240000 led only to insignificant reduction of the LCST values of DMAEM homopolymer.…”

Comparison of Surface and Net Charge Densities of Poly(acrylonitrile) Membranes Grafted with Ionic Monomers: Hydrophilic and Hydrophobic Effects of Graft Chain

“…Why, in spite of Fact 2, is the apparent surface charge densities-which depend on the magnitude of the zeta potential (5)-of AAcgrafted and DMAPAA-grafted PAN membranes more than double those of MOEP-grafted and DEAEM-grafted PAN membranes? We suggested previously that this phenomenon can be explained by either of two models: the ion-pairing effects between the charge groups and counterions (8) or a configuration model of the graft chains (9). We present here further discussion on this phenomenon by analyzing with potentiometric titration the dissociation behaviors of the grafted membranes.…”

ATRP Synthesis of Amphiphilic Random, Gradient, and Block Copolymers of 2-(Dimethylamino)ethyl Methacrylate and n-Butyl Methacrylate in Aqueous Media

“…The LCST of the polymers was found to be almost concentration independent in the range of 5-10 wt % but increases at lower solution concentrations as reported earlier for other thermosensitive polymers. 5 Aggregation Properties. Figure 7 illustrates the NMR spectra of a series of MPEG-based gradient copolymers containing DMAEMA and BMA.…”