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Knowing Homopolymer of Maleic Acid

Maleic Anhydride has been homopolymerized, contrary to accepted beliefs. Polymerization of either molten or dissolved monomer was initiated with the use of gammaradiation and free-radical initiators.The carboxyl group propinquity is responsible for peculiar behavior of aqueous solutions of salts of the poly-acid.
Homopolymer of Maleic Acid (HPMA) is a low molecular weight polymeride, with average molecular weight 400-800. HPMA has obvious threshold effect under high temperature and high pH level, suitable to be used in alkaline water system or built with agents.HPMA has good scale inhibition (98%) and scale stripping properties. When used together with zinc salts, it can effectively inhibit carbon steel corrosion.
Due to its good scale inhibition and high temperature tolerance properties, HPMA is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.HPMA can also used as additives for cement.
A method for the homopolymerization of maleic anhydride which comprises the controlled addition of a heated mixture of maleic anhydride, a polymerization initiator and a solvent for the monomer but not the polymer to a heated reaction zone containing a dilute solution of maleic anhydride in the identical solvent whereby the polymerization of the monomer and the precipitation of the polymer occur virtually simultaneously upon introduction of the feed monomer into the reaction zone.