Stiffening object

Further contrast between metal and composite stiffeners is revealed when we examine the objectives and characteristics of stiffener design. For a metal stiffener of uniform or even nonuniform thickness, we attempt to maximize the moment of inertia of the stiffener in order to maximize the bending stiffness of the stiffener. Those two factors are proportional to one another when we realize that the bending stiffness of metal stiffeners about the middle surface of the plate or shell to which they are attached is... 

Many linear polymers are too flexible to be of use in making everyday objects because they lack the strength, the rigidity, or the elasticity for the job. Linear polymers can be stiffened and strengthened by bonds between the chains. This process is known as cross-linking and we will look now at some ways in which this can be achieved. 

Draining of Consolidants Effect of Concentration. As noted in the introduction, one objective of the studies described here is to examine techniques for applying consolidants under conditions that will reduce the physical hazards to which the fabric substrate is exposed. Since the acrylic resins examined in Part II of this series (I) have outstanding resistance to degradation from UV light and heat and normally do not yellow or stiffen under adverse conditions, some of these resins were re-examined using a much less severe application technique. Milder curing procedures also were utilized. 

Sodium hyaluronate, or HA, is a biocompatible polysaccharide that is encountered in medicine and the cosmetics industry. Its macroscopic properties are highly sensitive to its hydration level, which is the reason why it has been the object of many studies. When in its dried state, or scarcely hydrated, it is stiff. In this state it may act as a skin-stiffening agent, smoothing wrinkles for instance. When highly hydrated, it acts as a lubricant that is found in synovial fluid. The elucidation of its hydration mechanism has shown us the role of the developing H-bond network in the change of its properties and, at the same time, the power and sensitivity of IR spectrometry to observe water molecules in macromolecules. 

Problem Competitive pressures and high resin prices aeate a need for lighter-weight packaging for c nsumer goods Objective Use alternative forms of stiffening fillers to allow reductions in waU thickness, weight, and resin. 

Suzuki polycondensation of a dendronized maaomonomer with a comonomer has been used to generate cylindrical dendronized brushes. One objective of research on dendronized polymers is to use the decoration with dendrons as a means to stiffen the backbone to the point that it is fully stretched. This goal should be reached when the individual... 

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