This document discusses melamine polymer. It begins by defining polymers and their types, including thermoplastics and thermosets. It then discusses the two main polymerization reactions: addition polymerization and condensation polymerization. The document provides a history of melamine, noting its discovery in 1834 and its increasing use in the 1930s. It describes melamine as a synthetic homopolymer containing nitrogen. The industrial production of melamine from urea is outlined in two steps. Common applications of melamine include dinnerware, whiteboards, paper products, textiles, tires, paints, and flame retardants. Finally, references on the history and uses of melamine are provided.

2. Supervised by:
Presented
By:
Samina Hasan
2013-ag-6272
Msc Chemistry 4th
Dr. Nazish Jahan
University of Agriculture Faisalabad,
Pakistan

3. melamine
polymer

5. POLYMER:
The repeated unit of monomer is
called polymer.
The process through which
polymers are formed.

6. Origin :
•Natural polymer
•Synthetic polymer
•Semi-synthetic polymer
Composition:
•Homo-polymer
•Co-polymer

7. Thermoplastic:
can be molded on heating e.g. PVC
Thermo sets:
can not be molded on heating
again and again e.g. diene rubber

8. 1. Addition polymerization
OR
Chain growth Reaction
2. Condensation
Polymerization
OR
Step growth reaction

9. Growth chain reaction:

10. Condensation polymer:
Condensation polymerization, a formofstep-growth
polymerization, is a processby whichtwo molecules join together,
resultingin loss of small molecules which are often water

11.  History
• In 1834, synthesized by
German scientist Justus Von
Leibig.
• In 1930,the prices were cheap,
American began using its powder
to make things e.g beetleware and
kitchen items.

12. Origin/Composition
• Melamine is synthetic
polymer
• It is Homo-polymer
Structure
•Hetro-cyclic organic
compound
• Rich in Nitrogen, a
property similar to
protein

13. Synthesis of Melamine
•most industrial manufacturers use urea to produce
melamine:
Steps of Reaction
1ststep
2nd step
6 HCNO + 3 NH3 → C3H6N6 + 3 CO2 + 3NH3
6 (NH2)2CO → C3H6N6 + 6 NH3 + 3 CO2
(NH2)2CO → HCNO + NH3

14. (Resin)

15. • Used to form dinner-
ware
• Good quality material
• Crockry material
• Not cracked easily

16. • It used to form white
board.
• Used in paper manufacturing
industry
• Enhance strength and whiting

17. • It used in industries
as fixer
• Used as auxiliaries in textile
industries

18. • Used as cross linkers
in tires & rubber
industry
• It used as
flooring agent

19. • Melamine used as parts
of paints & varnishes
• also used as fertilizer
• It used as flame
retardant material
• used as sound
absorbing material

20.  Gibson, Weldon B (1980). SRI: The Founding Years.
Stanford Research Institute. ISBN 0-913232-80-7.
Jump up^ Anne Field (2003-06-2 . "Melamine
Plastic". Home Maintenance and Repair. Michigan State
University Extension.
Jump up^ "The Rise and Fall of Melamine
Tableware". plastiquarian (Plastics Historical Society)
(32): 10. Summer 2004. Archived from the original on
2008-06-25. Retrieved 2008-12-12.
Jump up^ "Melamine". Pro Woodworking Tips.com.
References