645 Result(s)
within
English
Characterization and Evaluation of Materials
Physical Chemistry
Polymer Sciences
Qi**g Yu
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Article
Effect of molecular packing density on the crystallization rates of linear polymers from the melt
Analysis of the existing experimental data on the crystallization rates of polymers from the melt has shown that the value of the pre-exponential factor, G0, in the growth-rate equation is strongly dependent on t...
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Article
Temperature transitions in filled block copolyurethanes
For block-copolyurethanes with cristallizable and amorphous blocks the influence of different fillers on temperature transitions was investigated. It has been shown that fillers influence selectively onto tran...
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Article
Thermodynamics and kinetics of phase transitions in linear polyurethanes from hexa(methylene diisocyanate) and low molecular weight glycoles
Linear polyurethanes based on hexa(methylene diisocyanate) and oligo(ethylene glycoles) were studied using the methods of differential calorimetry, dilatometry and hot-stage microscopy. Thermodynamic analysis ...
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Article
Phase equilibria in water-protein-polysaccharide systems
Phase separation and thermodynamic stability of water (W) — casein (C) — neutral polysaccharide (NPS) systems have been studied. Dextrans of different molecular weights D40, D150, D500 and D2000 (10−3 M ...
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Article
Action of surface-active substances on biological membranes I. Effect of chemical modification of membranes on hemolysis of erythrocytes by sodium alkyl sulfates
The hemolytic action of a homologous series of sodium alkyl sulfates (C 8 toC 15) on dog and human erythrocytes was measured. The influence of trypsin, pronase and neuraminidase treatments on the lytic resistance...
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Article
Limited thermodynamic compatibility of proteins in aqueous solutions
Conditions are established for limited thermodynamic compatibility of proteins of different classes, as distinguished by Osborne, in aqueous solutions. The result obtained are in good agreement with the concep...
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Article
Crystallization of filled Nylon 6 II. Isothermal crystallization
Isothermal crystallization kinetics from the melt of nylon 6 containing various amounts of untreated glass beads and Aerosil (series GB and A) and aminosilane-treated glass beads (series GBA) was studied by DS...
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Article
Crystallization of filled nylon 6 III. Non-isothermal crystallization
DSC data on crystallization kinetics from the melt at different cooling rates of nylon 6 containing various amonts of untreated and surface-treated fillers, were analyzed in terms of a modified Kolmogorov-Avra...
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Article
On the concentration dependence of the elasticity modulus of soybean globulin gels
The concentration dependence of the elasticity modulus (G) of gels produced by heating soybean globulins (SBG) has been investigated in the concentration range C=7.5–58.4%. The tests included constant rate loa...
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Article
Phase equilibria in water-protein-polysaccharide systems
Phase equilibria in the ternary water-soy bean globulins-polysaccharides systems, containing various acidic and neutral polysaccharides (pectin, sodium alginate, carboxymethylcellulose, arabic gum, dextransulp...
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Article
Cationic ring-opening polymerization of 2-phenyl-1,3,6,2-trioxaphosphocane
The ring-opening polymerization of 2-phenyl-1,3,-6,2-trioxaphosphocane (4), an eight-membered cyclic phosphonite, has been investigated. Cationic initiators of PhCH2-Cl and MeOTf gave polymers, whereas anionic an...
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Article
Copolymerization of N-tert-butyl acrylamide with acrylonitrile and with methyl methacrylate
The reactivity ratios for the radical Copolymerization of N-tert-butyl acrylamide with acrylonitrile and with methyl methacrylate were determined at 60°C.
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Article
Investigation of antibody structures by scattering techniques
Different experimental methods - hydrodynamical measurements, electronmicroscopy, X-ray crystallography, Yray and neutron small-angle scattering — provide data on the shape and dimensions of immunoglobulin mol...
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Article
Quasielastic light scattering measurements of self-diffusion and mutual diffusion in gelatin solutions and gels
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Article
Polymerization of bicyclic ethers
Structure of copolymers obtained by ring opening cationic polymerization from 7-oxabicyclo[ 2.2.1] heptane and ethylene oxide has been recently reported. This study about the spin lattice relaxation times and ...
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Article
Analysis of the contribution of skeletal vibrations to the heat capacity of linear macromolecules in the solid state
Automatic computer programs are developed to calculate one- two-, and three-dimensional Debye functions. Prior tables of these functions are critically reviewed. Also, strategies are derived to calculate Debye...
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Article
Spontaneous copolymerizations of 2-phenyl-1,3,6,2-trioxaphosphocane with α,β-unsaturated acids and with α-keto acids
2-Phenyl-1,3,6,2-trioxaphosphocane(1), an eight-membered cyclic phosphonite, was copolymerized withα,ß-unsaturated acids and with α-keto acids. The copolymerization took place above room temperature without added...
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Article
Thermophysical behaviour of solid polymers in simple elongation: A structural and molecular interpretation
Thermodynamic aspects of reversible simple extension of solid polymers have been considered in terms of the conventional equation of state and equations have been obtained for the thermodynamic functions. It i...
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Article
Polymerization of acrylic acid initiated with poly-γ-mercaptopropylsiloxane
A water soluble polyacrylic acid has been obtained by polymerization of acrylic acid initiated with silica-supported poly-γ-mercaptopropylsiloxane in the presence of water and carbon tetrachloride. A super abs...
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Article
Thermoelasticity of segmented polyurethanes
Various diphenylmethane diisocyanate-containing polyurethanes whose soft blocks differ in polarity and crystallizability have been investigated using deformation and scanning calorimetry to ascertain the contr...
