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The characteristics of dry strength additives affect their efficiency in improving fiber bonding. In this work, the influence the charge density and molecular weight, MW, of cationic poly (vinyl alcohol), CPVAs, in improving the strength of papers was investigated at equilibrium level of CPVA adsorption. In the case of CPVAs with the charge density of 0.75meq/g, the small CPVAs (h y <8nm)...
The influence of polymer characteristics on paper properties has not been well understood. In this work, we aimed at analyzing the performance of various cationic-modified poly vinyl alcohols (CPVA), as dry strength additives, on the properties of high-yield pulp (HYP). Various dosages of CPVA having different molecular weights (MW) and charge densities were applied on HYPs, and the resulting paper...
In this work, the diffusion of cationic poly (vinyl alcohol) (CPVA) with well-defined structures into the pores of bleached kraft fibers was investigated at equilibrium level of adsorption by means of adsorption, solute exclusion technique (SET), and nuclear magnetic resonance (NMR) relaxation method. The results showed that the interaction between CPVA and dextran polymers was weak, which allowed...
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