DID YOU KNOW…

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Here you'll find informational "factoids" that will give you insight into both polymers and the broad scope of technical expertise available at PELabs.

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Did You Know…

	…a very simple mold flow analysis can prevent a weld line from showing up in a critical location on a part?
	…injection molding, extrusion, and other plastic processing equipment are moving rubbery materials and not simple liquids?
	…the force under the head of a screw of a plastic part can change by decades after several months?
	…plastics under a load will continue to deform with the passage of time?
	…creep is the term used to describe the increase in deformation with the passing of time?
	…the elongation to failure in semi-crystalline polymers (e.g., polyethylene) varies an order of magnitude with strain rate?
	…when loaded and then unloaded, plastics recover their initial configuration in time, as long as the loads aren’t too severe?
	…oscillatory testing, often called Dynamic Mechanical Analysis (DMA), makes it possible to control the time variable when testing plastics?
	…polycarbonate needs a hydrolysis stabilizer to minimize degradation in high humidity environments?
	…the conditions under which the ductile-brittle transition occurs are influenced by the presence of additives, such as pigments?
	…the science of Rheology applies to both materials that visibly flow in short time or appear solid over extended times?
	…some traditional “strength-of-Materials” solution can be easily converted to viscoelastic solutions?
	…the modulus determined in a Dynamic Mechanical Analyzer (DMA) may be used to analyze the plastic response to a vibration input?
	…differential scanning calorimetry (DSC) equipment can determine a glass transition temperature from micrograms of plastic?
	…virtually all polymers, thermoplastic and thermoset, undergo a glass transition?
	…the cavity number may be important information when diagnosing a failed plastic part?
	…the critical thickness for amorphous polymers decreases with decreasing temperature and decreasing notch radius?

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