Molecular weight distribution, rheological property and structural changes of sodium alginate induced by ultrasound

Rheological Method for Determining Molecular Weight and Molecular Weight Distribution

Effect of Molecular Weight Distribution on Chemical, Structural and Physicochemical Properties of Sodium Lignosulfonates

Chemical, structural and physicochemical properties of six sodium lignosulfonates (SLS) fractions with high purity and narrow molecular weight distribution (Mw) ranked between 2307 and 19583 g.mol -1 were studied. Structural characterization of these fractions, using 31 Phosphor Nuclear Magnetic Resonance ( 31 P NMR) and Fourier Transformed InfraRed (FTIR) analysis, was reported. 31 P NMR and F...

Synthesis and rheological evaluations of novel injectable sodium alginate/ chitosan-nanostructured hydroxyapatite composite bone pastes

In this paper, nanostructured carbonated hydroxyapatite powder was synthesized using biomimetic method. Physical properties and morphological features of the powder was studied using appropriate techniques such as BET, TEM, XRD and FTIR. The powder was separately mixed with 3 wt. % solutions of either sodium alginate or chitosan to form different pastes. Rheological behavior of the pastes in os...

Evaluation of Models Combining Rheological Data with the Molecular Weight Distribution

SYNOPSIS The aim of this article is to test and to improve existing models combining rhe-ological data with the molecular weight distribution (MWD). This process of testing and improving was separated into two distinct steps: First, the mixing behavior of the relaxation modulus obtained from a polymer blend was investigated and compared with the proposed mixing behavior derived from the linear ...

Ca-alginate hydrogel rheological changes caused by yeast cell growth dynamics

Interactions between immobilized cell populations and polymer matrixes in the form of hydrogel within micro-beads have complex restrictive action on cell growth dynamics. The forces generated by cell growth and interactions between solvent, network parts and cells influenced this process. It induces structural changes of hydrogel which has the feedback action on cell growth. Rheological respons...