Epoxy polymers glassy

In some cases deviations from Fickian behavior in glassy epoxy polymers (19-25) have been adequately described using dual mode sorption theory (22-24). This theory is based upon the premise that the sorbed penetrant exists in two thermodynamically distinct populations. These populations consist of molecules adsorbed in "holes", and species simply dissolved in the polymer matrix. 

J.N. Sultan and F.J. McGarry, "Effect of Rubber Particle Size on Deformation Mechanisms in Glassy Epoxy, Polym. Eng. Sci., (1) 29 (1973). 

Sultan J N and McGarry F J (1973) Effect of rubber particle size on deformation mechanisms in glassy epoxy, Polym Eng Sci 13 29-34. 

Hence, the results stated above have confirmed that PCP crosslinking density variation results in a change in the statistical segment length and, as a consequence, the value of N. In other words, statistical flexibility of the PCP chain is defined not only by its chemical structure, but also by the topological level of the PCP structure. A similar effect was observed earlier for glassy epoxy polymers [32]. If the indicated... 

Massam, J., Pinnavaia, T.J., (1998) Clay Nanolayer Reinforcement of a Glassy Epoxy Polymer. Mater. Res. Soc. Symp. Proc. 

The aforementioned analyses were essentially elastic in nature. However, Huang and Kinloch (7,8) developed a two-dimensional, plane-strain model to analyze the stress fields around the dispersed rubbery particles in multiphase, rubber-modified epoxy polymers. The epoxy matrix was modeled as either an elastic or elastic-plastic material. Their work revealed that the plane-strain model predicted higher stress concentrations within the glassy polymeric matrix than the axisymmetric model. Furthermore, they successfully applied their... 

Analysis of the relationship between and df for the epoxy polymers considered showed that an increase in the fractal dimension of the framework to the gelation point induces a decrease in the fractal dimension of the supermolecular (super-segmental) structure of the network polymer in the glassy state. 

It has been established that the structure of an amorphous polymer is fractal with a fractal dimension (df) (2 < df < 3). Therefore we ought to expect, that the fluctuation free volume should also have fractal properties. The purpose of this chapter is to investigate the fractality of the fluctuation free volume in glassy polymers and epoxy polymers are... 

Jan Jansen, B. J. P., Tamminga, K. Y., Meijer, H. E. H., Lemstra, P. J. Preparation of thermoset rubbery epoxy particles as novel toughening modifiers for glassy epoxy resins. Polymer 40... 

A simple equation enables us to estimate the main peculiarities in viscoelastic properties of the specimen made of two constituent parts. All calculations were done by computer simrdation. Typical curves of temperature dependence of the real part of shear modrdus G and tan8 were taken as initial data for calculations. For such curves, the experimental data on the temperature dependence of G and tan6 for an epoxy polymer in the region of transition from glassy to rubber-like state were chosen. These experimental dependencies may be approximated as follows ... 

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