Polyaspartic aliphatic polyurea coating synthesis

Polymers are the base material of products such as plastic, rubber, synthetic fiber, some dyes and adhesives, which are widely used in all areas of our daily life. It is enough to emphasize the importance of the Polymers Chemistry and Polymer Technology sciences, as well as polymers that the production of polymer species is much higher than world steel production, and that more than half of the graduates of Chemistry and Chemical Engineers from universities work directly or indirectly on an area related to polymers .Elastomers are kind of polymers which have both hyperelastic and viscoelastic behavior with nearly incompressible properties. Aspartic polyurea is a type of elastomer that mainly used as coating materials of floors, tanks, and tubes and also recently, because of their excellent resistance against impact and explosive loads, they are employed in military applications. Also it exhibits brilliant pressure relieving in most loading types.It is made of polymerization process between curative part and resin blend component in which diisocyanate has the role of curative component and polyamines are the resin blend components.In this study, Desmophen NH 1520 and Desmophen NH 1420 were utilized as polyamines (prepolymer) and N75 as curative resin blend component. Polyurea has the capacity to create improvement in properties at various of composition of diisocyanate and polyamines. In this investigation it was tried to enhance the mechanical properties of aspartic polyurea by altering the compound of each sample. The major goal was to assess which of manufacturing parameters yields the best overall mechanical performance. Furthermore, in process of making samples ,the best sample has been drived by the best mechanical properties will be the best one.In other face the lowest performance will be choosen as the hyperelastic materials. The physical properties of the polyureas in different compositions were determined using the experimental design method by Box-Behnken. Ca (NH 1420) / Cb (NH 1520 ), Temprature (°C ) ve rpm ,the answers Y1( tensile ) , Y2 ( elongation %) , Y3 (compression force) and Y4 (compression stress) have been discused in this thesis. For this reason, samples were prepared according to box-behnken frame work design for 3 factors of composition ratio, temperature and stirring speed.