Morphology and Kinetics

Moisture absorption by plastic foams is a slow process and attainment of equilibrium under normal conditions requires several weeks. A generalized kinetic dependence of moisture abarrption obtained by Shutov and Chaikov for various types of rigid PUR (PPU-305 A grade) and epoxidephenolic (PEN-I grade) foams is given in Fig. 7 .  

A statistical treatment of experimental data by the metlwd of correlation analysis permits to suggest a simple analytical expression for the time dependence of the relative moisture absorption 

Dependences of index t and constant Cj on the chemical type of the polymer matrix and the method of surface treatment are discussed below (see Table 4). 

The dependence of the equilibrium moisture absorption on morphology parameters, volume fraction of polymer (apparent density) and volume fraction of 

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Sychev, M. M., Medvedeva, I. N., Biokov, V. A. Krylov, O. S. (1982). Effect of reaction kinetics and morphology of neoformation on the properties of phosphate cements based on magnesium titanates. Chemical Abstracts, 96, 222252e. 

J. Zhang and D. J. Young, Kinetics and Mechanisms of Nickel Metal Dusting 1. Kinetics and Morphology, Corrosion Science, 49 1496-1512(2007). 

Addition of anions to NaOH solution affects the anodic film formation kinetics and morphology. These films are mainly a-PbO, with the exception of chloride ions solution, where 8-PbO is formed [157]. Tknodic oxidation of Pb electrode in hot alkaKne solution (containing NaOH) facilitates selective growth of a-PbO, /3-PbO, and Pb02- (x = 0-1) phases, depending... 

D.E. Ovsienko, G.AAlflntsev Crytal Growth from the Melt/Experimental Investigation of Kinetics and Morphology AH.Monish Morphology and Physical Properties of Gamma Iron Oxide... 

Effect of Stereosequence Length On Crystallization Kinetics and Morphology. 

Lucquin et al. [184—188], have tested several models which allow for fuel consumption and include degenerate branching. Their models are therefore more realistic and give good accounts of the effect of promoters and inhibitors. As yet, however, they have not identified the specific chemical reactions in the models, but they are attempting to use them to describe the observed kinetics and morphology of propane—oxygen mixtures. 

In this chapter we will discuss some recent developments in this field as of 2004. Particular emphasis is given to quantitative studies of the connection between electrochemical kinetics and morphological evolution. No attempt has been made to review all of the relevant literature comprehensively, but rather our intent is to highlight a selection of exciting results that deal primarily with the filling of micro-and nanometer scale features. 

Characteristic kinetic and morphological features of vinyl chloride radical polymerization processes were reviewed in89. While developing a mathematical model for the polymerization of this monomer, Canadian90 and Soviet91 investigators concentrated their attention on the heterophase nature of the process. In both cases the dependence of kinetic constants on the viscosity of the medium was disregarded. 

De Bakker JM, Kainmuller ME, Muller ES, Lam AW, Seinen W, Bloksma N. Kinetics and morphology of chemically induced popliteal lymph node reactions compared with antigen-, mitogen-, and graft-versus-host-reaction-indnced responses. Virchows Arch B 1990 58 279-287. 

In this section, we briefly provide preliminary results on the morphology of etch pits obtained on cleaved calcite crystals by dissolution in unbuffered aqueous solutions of maleic acid (3 mM) under both stationary conditions and through channel electrode experiments. Kinetic and morphological studies on the effect of maleic acid on the dissolution of calcium carbonate... 

The behavior of binary blends with only one crystaUizable component has been studied by several authors, who have investigated different systems. The crystals of the crystaUizable matrix have grown in equilibrium with their own melt phase. The presence of separate domains of non-crystallizable component, dispersed in the molten matrix during the crystallization process, (owing to the kinetic and morphological effects), may cause a depression of the observed melting tem-... 

Three polycationic peptide sequences derived from the Sillp protein of C. fusiformis were exposed to varying reaction parameters in an effort to observe the influence of these parameters on reaction kinetics and morphology. The peptides of interest include R5, a 19 amino acid peptide which corresponds with silaffin-lAi R2 a 22 amino acid peptide, which corresponds with silaffin-lA2 and R1 a 33 amino acid peptide which is analogous to silaffin-lB (see Table 1). 

In view of the complex phase diagram of iPP/EPDM blend, it can be anticipated that crystallization kinetics and morphology development in iPP/EPDM blends would be complicated by the aforementioned phase separation. However, the thermodynamic phase diagram depicted in Fig. 16.1 certainly serves as guidance for mimicking the trajectory of thermal jump experiments. 

Claassen, N., 1990. Fundamentals of sod-plant interactions as derived from nutrient diffusion in soil, uptake kinetics and morphology of roots. Proceedings of the Fourteenth International Congress of Soil Science, Kyoto, Japan, vol. 11, pp. 118-123. 

It is important to emphasize that proper investigation of oxidation mechanisms involves as many of the above techniques of observing kinetics and morphologies as feasible, and careful combination of the results. 

J.S. Moreno, S. Panero, and B. Scrosati, Electrochemical polymerization of polypyrrole-heparin nanotubes Kinetics and morphological properties, Electrochim. Acta, 53, 2154—2160 (2008). 

In this study, the effect of L-Phen on the growth kinetics and morphological change of a L-Glu was investigated at 25 °C with a single crystal-method in a flow system. 

For block copolymer systems, most studies are related to ordering kinetics and morphological transition in melts or concentrated solutions. Examples include disorder-to-order [196], lamella-to-cylinder [197], cylinder-to-sphere [198], and... 

Sch] Scheuer, U., Phase Stability of Copper-Nickel-Iron Alloys Under Ion Irradiation , Radiat. Effi, 105(1-2), 85-106 (1987) (Experimental, Kinetics, Morphology, 32) [1987Wag] Wagner, W, Poerschke, R., Wollenberger, H., Alloy Decomposition in Cu-Ni-Fe. III. Influence of Electron Irradiation on Decomposition Kinetics and Morphology , J. Phys. F Met. Phys., 17(10), 2017-2029 (1987) (ExperimentaL Kinetics, Phase Relations, 14)... 

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