Infrared dichroism measurements of molecular relaxation in binary blend melt rheology

1989 ◽  
Vol 22 (3) ◽  
pp. 1334-1345 ◽  
Author(s):  
Julia A. Kornfield ◽  
Gerald G. Fuller ◽  
Dale S. Pearson
Keyword(s):  
Melt Rheology ◽  
Molecular Relaxation ◽  
Binary Blend ◽  
Infrared Dichroism

Graphene oxide dispersion state in polystyrene-based composites below percolation threshold via linear melt rheology

2021 ◽  
Vol 60 (4) ◽  
pp. 209-218
Author(s):  
Claudia Dessi ◽  
Leice G. Amurin ◽  
Pablo A. R. Muñoz ◽  
Yuri D. C. de Oliveira ◽  
Guilhermino J. M. Fechine ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Percolation Threshold ◽  
Oxide Dispersion ◽  
Melt Rheology ◽  
Dispersion State

scholarly journals Chitosan/Gelatin/PVA Scaffolds for Beta Pancreatic Cell Culture

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2372
Author(s):  
Yesenia Sánchez-Cardona ◽  
Claudia E. Echeverri-Cuartas ◽  
Marta E. Londoño López ◽  
Natalia Moreno-Castellanos
Keyword(s):  
Compressive Strength ◽  
Cell Viability ◽  
Pore Size ◽  
Three Dimensional ◽  
Ternary Blend ◽  
Ternary Blends ◽  
Binary Blend ◽  
Pancreatic Cell ◽  
Degradation Rates ◽  
Swelling Rate

Chitosan scaffolds based on blending polymers are a common strategy used in tissue engineering. The objective of this study was evaluation the properties of scaffolds based on a ternary blend of chitosan (Chi), gelatin (Ge), and polyvinyl alcohol (PVA) (Chi/Ge/PVA), which were prepared by cycles of freeze-thawing and freeze-drying. It then was used for three-dimensional BRIN-BD11 beta-cells culturing. Weight ratios of Chi/Ge/PVA (1:1:1, 2:2:1, 2:3:1, and 3:2:1) were proposed and porosity, pore size, degradation, swelling rate, compressive strength, and cell viability analyzed. All ternary blend scaffolds structures are highly porous (with a porosity higher than 80%) and interconnected. The pore size distribution varied from 0.6 to 265 μm. Ternary blends scaffolds had controllable degradation rates compared to binary blend scaffolds, and an improved swelling capacity of the samples with increasing chitosan concentration was found. An increase in Young’s modulus and compressive strength was observed with increasing gelatin concentration. The highest compressive strength reached 101.6 Pa. The MTT assay showed that the ternary blends scaffolds P3 and P4 supported cell viability better than the binary blend scaffold. Therefore, these results illustrated that ternary blends scaffolds P3 and P4 could provide a better environment for BRIN-BD11 cell proliferation.

scholarly journals Quantitative Comparison of Binary Mix of Agro-Industrial Pozzolanic Additions for Elaborating Ternary Cements: Kinetic Parameters

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2944
Author(s):  
Ernesto Villar-Cociña ◽  
Moisés Frías ◽  
Holmer Savastano ◽  
Loic Rodier ◽  
María Isabel Sánchez de Rojas ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Sugar Cane ◽  
Research Work ◽  
Pozzolanic Reaction ◽  
Reaction Rate Constant ◽  
Pozzolanic Activity ◽  
Binary Blend ◽  
Activation Free Energy ◽  
Pozzolanic Reactivity ◽  
Bamboo Leaf Ash

In this research work, the quantitative characterization of a binary blend comprised of two pozzolans (sugar cane straw (SCSA)–sugar cane bagasse ashes (SCBA), bamboo leaf ash (BLAsh)–SCBA and paper sludge (PS)–fly ash (FA)) taking into account the calculated values of the kinetic parameters of the reaction in the pozzolan/calcium hydroxide system is shown. The paper shows the most significant and important results obtained by the authors in the quantitative assessment (calculation of kinetic parameters) of the pozzolanic reaction of different mixtures of pozzolanic materials that are residues from agriculture or industrial processes. This allows a direct and rigorous comparison of the pozzolanic activity of the binary combinations of materials. The values of the kinetic parameters (reaction rate constant or activation free energy) constitute a very precise quantitative index of the pozzolanic activity of the binary combinations of materials, which is very useful for its employment in the elaboration of ternary cements. This paper shows that the binary blends 1SCBA60Blash40, 1SCBA50Blash50, 1SCBA70Blash30 have a very high pozzolanic reactivity followed by PSLSFA, 2SCBA50SCSA50, PSISFA and SCWI.

Fouling behavior of urban sewage on binary blend PVDF UF membrane

2014 ◽  
Vol 52 (25-27) ◽  
pp. 5092-5101 ◽  
Author(s):  
Xiao-rong Meng ◽  
Hai-zhen Zhang ◽  
Lei Wang ◽  
Xu-dong Wang ◽  
Dan-xi Huang
Keyword(s):  
Binary Blend ◽  
Urban Sewage
Sign in / Sign up

Export Citation Format

Share Document