Algorithm for calculating batch polymer dissolution processes

1988 ◽  
Vol 19 (6) ◽  
pp. 405-409
Author(s):  
V. S. Kozlov ◽  
T. A. Roven'kova ◽  
Z. S. Khanin ◽  
K. G. Tarasov ◽  
N. V. Rakitina
Keyword(s):  
Polymer Dissolution

A Novel High Throughput Method to Investigate Polymer Dissolution

2009 ◽  
Vol 31 (4) ◽  
pp. 385-390 ◽  
Author(s):  
Ying Zhang ◽  
Surya K. Mallapragada ◽  
Balaji Narasimhan
Keyword(s):  
High Throughput ◽  
High Throughput Method ◽  
Polymer Dissolution

Model for the Kinematics of Polymer Dissolution

1977 ◽  
Vol 21 (2) ◽  
pp. 131-142 ◽  
Author(s):  
Yih-O Tu ◽  
A. C. Ouano
Keyword(s):  
Polymer Dissolution

Elastic Deformation and Molecular Weight in Polyisobutylene

1946 ◽  
Vol 19 (4) ◽  
pp. 1047-1050
Author(s):  
John Rehner
Keyword(s):  
Molecular Weight ◽  
Parallel Plate ◽  
Compressive Load ◽  
Published Data ◽  
Fractional Powers ◽  
Rapid Procedure ◽  
Molecular Weights ◽  
High Elasticity ◽  
Polymer Dissolution ◽  
Straight Lines

Abstract Although various properties of high polymers are known to depend on molecular weight, there appear to be no published data which show explicitly how the molecular weight of a rubber-like substance influences the modulus of high elasticity, even though a psychological perception of some such relationship has long existed. Also, the various expressions that have been derived by statistical methods contain molecular weight as a factor ranging from an inverse first power up to inverse higher fractional powers. Some time ago a need arose in this laboratory for estimating the average molecular weights of samples of polyisobutylene by a rapid procedure. Because of the slowness of polymer dissolution, methods based on measurements of the polymer in the dissolved state had to be ruled out and an investigation was, therefore, made of the rate of compression of a variety of samples in a Williams parallel-plate plastometer. It was found possible to render negligible the viscous component of deformation by using a sufficiently high compressive load and by limiting readings to an interval of about one minute. When the observed deformation values were plotted against the logarithm of time, straight lines were obtained. The slopes of the lines could be correlated, at least approximately, linearly with the reciprocal average molecular weights of the samples.

scholarly journals Polyacrylamide flocculants in phase separation processes of mineral ore salt dispersions

2019 ◽  
Vol 55 (3) ◽  
pp. 369-376
Author(s):  
D. N. Davlud ◽  
P. D. Vorobiev ◽  
D. V. Сherednichenko ◽  
N. P. Krutko ◽  
E. V. Layeuskaya ◽  
...  
Keyword(s):  
Sedimentation Rate ◽  
Saline Solution ◽  
Narrow Range ◽  
Solid Concentration ◽  
Salt Solutions ◽  
Dispersion Method ◽  
Separation Processes ◽  
Cationic Copolymers ◽  
Polymer Dissolution ◽  
Two Stages

The features of clay-saline (potassium and sodium chlorides) dispersions flocculation using polyacrylamide and its cationic and anionic copolymers are described, including the effect of flocculant concentration, solid concentration in dispersion, method of polymer dissolution in water or saline solution on the sedimentation rate and flocculation density. It is shown that polyacrylamide has the highest flocculating ability towards clay-saline dispersion, and cationic copolymers – the lowest effect. It is shown that in concentrated clay dispersions flocculation starts at lower flocculant dose rate and occurs in a narrow range of polymer concentrations. The sedimentation rate of clay in salt dispersion increases by 15–20% with the introduction of flocculant in two stages, and by 50% times – with consequent dosing of cationic and anionic flocculant. It is also stated that polymer solutions prepared using concentrated salt solutions of potassium and sodium chlorides provide a higher efficiency of clay flocculation in comparison with solutions of polymers prepared in water.

The Mechanism of Phenolic Polymer Dissolution:  A New Perspective

1997 ◽  
Vol 30 (16) ◽  
pp. 4656-4664 ◽  
Author(s):  
Pavlos C. Tsiartas ◽  
Lewis W. Flanagin ◽  
Clifford L. Henderson ◽  
William D. Hinsberg ◽  
Isaac C. Sanchez ◽  
...  
Keyword(s):  
Phenolic Polymer ◽  
Polymer Dissolution ◽  
New Perspective

scholarly journals A New Class of P(VdF-HFP)-CeO2-LiClO4-Based Composite Microporous Membrane Electrolytes for Li-Ion Batteries

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
G. Vijayakumar ◽  
S. N. Karthick ◽  
A. Subramania
Keyword(s):  
Composite Membrane ◽  
Phase Inversion ◽  
Vinylidene Fluoride ◽  
Composite Membranes ◽  
Cycling Performance ◽  
Microporous Membrane ◽  
Inversion Method ◽  
Electrolyte Uptake ◽  
A Cell ◽  
Polymer Dissolution

Composite microporous membranes based on Poly (vinylidene fluoride–co-hexafluoro propylene) P(VdF-co-HFP)-CeO2were prepared by phase inversion and preferential polymer dissolution process. It was then immersed in 1M LiClO4-EC/DMC (v/v=1:1) electrolyte solution to obtain their corresponding composite microporous membrane electrolytes. For comparison, composite membrane electrolytes were also prepared by conventional phase inversion method. The surface morphology of composite membranes obtained by both methods was examined by FE-SEM analysis, and their thermal behaviour was investigated by DSC analysis. It was observed that the preferential polymer dissolution composite membrane electrolytes (PDCMEs) had better properties, such as higher porosity, electrolyte uptake (216 wt%), ionic conductivity (3.84 mS⋅cm−1) and good electrochemical stability (4.9 V), than the phase inversion composite membrane electrolytes (PICMEs). As a result, a cell fabricated with PDCME in between mesocarbon microbead (MCMB) anode and LiCoO2cathode had better cycling performance than a cell fabricated with PICME.

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