Improved mechanical properties of new melamine prepared resins

الملخص EN

The melamine resin has a good chemical properties against alcoholic and water solutions but it has a very long time of reaction and curing.

The period of reaction by could be rapid the reaction between urea–melamine to improve the functionality and adhesion then improve the mechanical property of melamine resin only.

Five mass ratios of urea to melamine (U:M) and melamine to formaldehyde (M:F) were prepared as (2:50, 4:50, 6:50, 8:50, 10:50) (1:9, 2:8, 3:7, 4:6, 5:5) gm / gm at different operation conditions of temperature (20-110oC), mass ratio (1-10), and time of reaction (1-3 hrs).

By using a design reaction system of nitrogen and reflux.

The drying system was applied to the prepared adhesives and then check the optimum conditions of preparation on the testing properties.

The results indicated that optimum mass ratio which gave an optimum mechanical properties is 6:50 (U:M), and 3:7 (M:F).

The impact load is 9 J / cm for (U:M) and 12 J/cm (M:F), compression load is 0.5 kN / Cm (M:U), 0.8 kN / Cm (M:F), tensile load 42 dyne / cm (M:U) and 97 dyne / cm (M:F), and bending load of 2.3 mm and 2.2 mm for (M:U) and respectively (M:F).