Synthetic glues like Elmer's are made of polyvinyl acetate (PVA) emulsions. The word emulsion refers to the fact that the PVA particles have been emulsified or suspended in water. The thinner the glue, the more water it has in it.Know More
In addition to water and PVA, synthetic glue can also contain ingredients like ethanol, acetone, and amyl acetate. Ethanol slows down the drying time, acetone speeds up the drying time, and amyl acetate slows down the evaporation of the glue. However, some natural glues – called hide glues or protein adhesives – are made from animal proteins or gelatin. This is why people often speak of dead horses being sent to the glue factory.
Humans have been experimenting with animal-based adhesives for thousands of years, and the world's oldest glue on record has been carbon dated as being over 8,000 years old. Archaeologists discovered the glue in Israel in a cave near the Dead Sea. The glue was made from collagen, an animal protein, and it was used as a water-sealant, an adhesive and a protectant.
Four thousand years ago, ancient Egyptians used similar collagen-based glues in furniture construction, and about 1,500 years ago, Native American people used collagen-based glues while making bows for hunting and batlle.Learn more about Chemistry
The chemical formula for chromium (III) acetate is notated as Cr(C2H3O2)3. The formula contains the symbol Cr for chromium. The chemical formula for acetate, C2H3O2, uses the symbols C for carbon, H for hydrogen and O for oxygen.Full Answer >
The pKa of sodium acetate is 4.76, according to the University of California, Berkeley. The formula for sodium acetate is CH3COONa, and it is abbreviated as NaOAc. The compound is also referred to as sodium ethanoate.Full Answer >
The molar mass of sodium acetate, which is represented by the chemical formula C2H3NaO2, is 82.03 grams per mole. The molar mass is calculated by summing the molar mass of each atom of carbon, hydrogen, sodium and oxygen in a sodium acetate molecule.Full Answer >
Iron(II) acetate, also called ferrous acetate, is an iron salt of acetic acid, with the formula Fe(CH3CO2)2. Its molecular formula can also be written as C4H6FeO4, and its molar mass is 173.93 grams per mole.Full Answer >