Mechanical properties generalities

The description of the physical properties of fluoroelastomers is necessarily less precise than that of fluoroplastics because of the major effect of adding curatives and fillers to achieve useful cross-linked materials of a given hardness and specific mechanical properties Generally, two parameters are varied increasing cross-link density increases modulus and decreases elongation, and raising filler levels increases hardness and decreases solvent swell because of the decreased volume fraction of the elastomer In addition to these two major vanables, the major determinants of vulcanizate behavior are the chemical and thermal stabilities of its cross-links The selection of elastomer, of course, places limits on the overall resistance to fluids and chemicals and on its service temperature range... 

Basic, general purpose austenitic type with good corrosion resistance and mechanical properties. General purpose. Heat exchangers, towers, tanks, pipes, heaters, general chemical equipment... 

Plastics - Thermomechanical analysis (TMA) - Determination of linear thermal expansion coefficient and glass transition temperature Plastics - Thermomechanical analysis (TMA) - Determination of softening temperature Plastics - Determination of dynamic mechanical properties -General principles Plastics - Dynamic mechanical analysis - Determination of glass transition temperature Plastics - Dynamic mechanical analysis - Calibration... 

An interesting new development uses liquid crystal polymers (LCPs) to produce materials with exceptional physical and mechanical properties. Generally the LCP resin comprises of a polymer chain with structural units (mesogenic groups) which can be incorporated into the polymer backbone, or incorporated as a pendant group, or both. One approach is to use the epoxy resin system [18] ... 

Until about 1910, the term rubber was sufficiently descriptive for most purposes. It typified natural products derived from various trees and plants that could be formed into solids of various shapes which could be bent, flexed rapidly, or stretched with the amazing ability to return to essentially the initial form. As synthetic materials emerged, particularly synthetics that were directed toward capabilities different from those of natural rubber, considerable confusion resulted as to descriptive terminology. Hence the literature was rife with such terms as rubber, rubbery, rubberlike, and similar inept descriptions. Eventually H. L. Fisher struck a major blow to this confusion and coined the term elastomer to embrace natural as well as synthetic products with those mechanical properties generally associated with natural rubber. 

Resistant little or no change in weight small effect on mechanical properties generally suitable for practical use... 

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