what are the properties of glyptal
Answers
Explanation:
Polymer is a chemical compound or mixture of compounds which consist of repeating structural units.These are very large molecules which is made by adding many small molecules called monomers to form large chains.polymers may be natural or synthetic.Example of natural polymers are-protein, polysaccharide, starch, cellulose.Example of synthetic polymers are-nylons, polyesters, polyvinyls,glyptal, polystyrenes.
Cross-linked polymer is commonly known as “slime”. The polymerization of PVA with sodium borate decahydrate(Borax) in aqueous condition gives slime.The hydrogen bond between PVA and borate ion lead to a 3-D network with extensive cross-linking.These bonds are weak and can easily form and break.So,slime is often referred to as a reversible cross-linking gel.
An example of cross-linked polymer is Glyptal resin.If more than two hydroxyl groups are present on one of the monomers the chain can be linked to form large and strong 3-dimensional structure called thermosets. Thermosets are hard and insoluble even at room temperature and are often used for paints and coatings.Glyptal is formed using phthalic anhydride monomer and glycerol monomer.The addition of this hydroxyl group allows for extensive branching during polymerization.During polymerization reaction, the monomers are joined to form larger molecules and due to increase in attractive force between molecules,mixture become viscous.
Answer:
it is made up of ethylene glycol and terephthalic acid
Explanation: