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Improved Mechanical Properties of New Melamine Prepared Resins | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 27, 2014, Pages 483-490 | ||
| Authors | ||
| Saja S. Jabbar Al-Taweel; Haider A. Jamel; Laith S. Jassim | ||
| Abstract | ||
| Abstract 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). | ||
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