This document summarizes key information about the synthetic polymer nylon. It discusses nylon's origins at DuPont Company and its production via condensation polymerization of diamines and diacarboxylic acids. The document outlines different nylon types (6.6, 6, 6.7, etc.) and provides details on nylon's physical properties like high melting temperatures, tensile strength, density, and water absorbance. Processing techniques like injection molding are mentioned along with common nylon applications in textiles, automotive, and furniture. Finally, the document summarizes two research articles about using recycled nylon fibers to reinforce cement and creating nylon-composite propellers for aircraft.

1. Nylon
Nosheen Maryam Awan
M13-329
5th Semester
Department of Metallurgy & Materials Engineering
University of the Punjab

2. Introduction
• Polyamides
• Di-amines & di-carboxylic acids
• DuPont Company
• Condensation polymerization
• Nylon types(6.6,6,6.7,6.10,6.12 etc.)
• Zytal(DuPont), Ultramide(BASF)
Capron(Allied Signal), Durethan

3. Physical Properties
• Large influence of functional group
• Crystallinity increases
• High melting(190-350°C)temperature
• Tensile strength (90-185Nm/mm2)
• Density (113.135g/cm3)
• Water absorbance
• Chemically resistant

4. Processing Technique
• Injection molding
• Limitations
1. moisture absorbent
2. Effect of sunlight
• Applications
• Textiles
• Automotive
• Furniture

5. Research Articles
1)Recycled nylon fibers as cement mortar reinforcement
• Fishing nets was recycled and used as tensile reinforcement.
• Alkali resistant, no adverse impacts, crack resistant( +35%)
• Compressive strength increases (+75%)
(Figure.1)

6. Research Articles
2 ) Nylon composite propellers for aircrafts
• Nylon-6 and Montmorillonite hybrid was made
• HDT, strength increases, water absorption reduced (40%)
• Light weight
(Figure.2)

7. Conclusion
Necessity is the mother of invention
References:
• Plastic materials and processing
• Nylon composite propellers for aircrafts sep.2014
(V. Jaiganesh , S. Manivannan, S. Manivannan)
• Recycled nylon fibers as cement mortar
reinforcement Dec.2014 (Saverio Spadea ,Ilenia
Farina ,Anna Carrafiello ,Fernando Fraternali)