SALUTATION
PREPARATION OF UREA-FORMALDEHYDE RESIN
Supervised By:Dr. Md. Shamsul AlamProfessorDept. Of Applied Chemistry & Chemical TechnologyIslamic University, Kushtia.
Submitted By:A. M. ABU SAYEM MALIK
Roll No: 0613008Reg. No: 358
Session: 2006-2007
INTRODUCTIONU-F RESINS ARE:1.MOST IMPORTANT AND MOST
USED CLASS OF AMINO RESIN ADHESIVES.
2.POLYMERIC CONDENSATION PRODUCTS.
3.INSOLUBLE IN WATER BUT SOLUBLE IN ALCOHOL.
4.HARDENING AGENT, NON FLAMMABLE, GOOD THERMAL RESISTANCE, COLORLESS AND EASILY ADAPTABLE.
APPLICATIONS
1.AS ADHESIVES2.AS SURFACE COATINGS3.IN TEXTILES4.AS MOLDING RESINS5.AS LAMINATING RESINS
AIMS OF THE PRESENT
INVESTIGATION1. Investigating the effects with five parameters viz. pH, temperature, catalyst, U: F molar ratio and the duration of the reaction.
2. Preparation and characterization of basic components.
3. Detail FTIR analysis.4. To explore the complexity of the
structures.5. Co-relate molecular structure with
physical properties.
PREPARATION METHOD
Raw materials: Urea, Formaldehyde (37-40%).135cm3
37-40% HCHO
Adjusting pH in 7.5-8.0 of the solution
50 g Urea added to the
solution
pH adjusted to 3.5-5.0 with acetic
acid
Aliquots solution
appeared
pH of the solution
adjusted to 7.5-8.0
Precipitation occurred gradually
Syrup like solution obtained
Colorless U-F resin
2-5 cm3
NaOH stirring
stirringHeating for 15 mins
reflux
refluxAdd 1 M NaOH
Vacuum distillation
Keep 12 hr
Reactions and mechanisms
FTIR reports of The samplesFTIR OF FORMALDEHYDE
FTIR OF UREA
FTIR OF U-F RESIN
FTIR OF U-F RESIN
FTIR OF U, F, U-F RESIN
Absorption band assignment of FT-IR spectra
SUMMURY OF MY PROJECT1. The results of the typical urea formaldehyde
resin synthesized in acidic media, particularly that of pH 3.5, showed features in their (FTIR) spectra.
2. The synthesized UF resin is insoluble in water showing good resistance against acids, alkalis and various organic solvents.
3. The structural analysis of the UF resin sample was investigated through Fourier transform Infrared Spectroscopy (FTIR).
CONCLUSION1. An extension of the chemometric study to
permit optimization of the experimental conditions for the production of urea-formaldehyde resins having desired properties.
2. Infrared spectra of UF resin show differences in the chemical structure of conventionally synthesized UF resin, Urea and Formaldehyde.
THANK YOU VERY MUCH