salutation. preparation of urea-formaldehyde resin

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