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The term polypropylene glycol or PPG is reserved for polymer of low- to medium-range molar mass when the nature of the end-group, which is usually a hydroxyl group, still matters. The term "oxide" is used for high-molar-mass polymer when end-groups no longer affect polymer properties.
PPG Industries, a U.S. manufacturer, formerly known as Pittsburgh Plate Glass PPG Place, its office complex; Polypropylene glycol, a polymer; Post-prandial glucose, a measure of blood sugar after a meal; Pounds per gallon, a measure of density, typically of a fluid. It is common in the oil industry, especially as a unit for Mud weight.
A photolabile protecting group (PPG; also known as: photoremovable, photosensitive, or photocleavable protecting group) is a chemical modification to a molecule that can be removed with light. PPGs enable high degrees of chemoselectivity as they allow researchers to control spatial, temporal and concentration variables with light.
PPG soon became the United States' first commercially successful producer of high-quality, thick flat glass using the plate process. PPG was also the world's first plate glass plant to power its furnaces with locally produced natural gas, an innovation which rapidly stimulated widespread industrial use of the cleaner-burning fuel. [3]
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Consequently, a stressed material with a high density of crazes may appear 'stress-whitened,' as the scattering makes a normally clear material become opaque. [ 6 ] Crazing is a phenomenon typical of glassy amorphous polymers , [ 7 ] but can also be observed in semicrystalline polymers .
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