nylon 66

PRESENTATION ON NYLON66

Nylon-66IUPAC NAME

Poly[imino(1,6-dioxohexamethylene)iminohexamethylene]

OTHER NAMEPoly(hexamethyleneadipamide),poly(N,N’-hexametheleneadipinediamide)

CONTENTS-Physical propertiesSynthesis of Nylon-66ApplicationsAdvantages & Disadvantages

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o Molecular formula : (C12H22N2O2)n

o Density : 1.14 g/ml

o Melting point : 542K

o Crystalline,polar molecules

o Insoluble in hydrocarbons solvents but soluble in solvents like formic acid,phenols,cresols etc.

o Oil resistant

o Have a good tensile strength and self lubricating properties

PHYSICAL PROPERTIES

t

Nylon 6-6 is synthesised by plycondensation of

hexamethylenediamine and adipic acid. Hexamethylenediamine

and adipic acid are combined with water in a reactor. This

produces nylon salt. The nylon salt further on dehydration

gives monomer of nylon 66 which further polymerises to

nylon66

SYNTHESIS OF NYLON66

1.In continuous or extended exposure (UV stabilized N66)

2. Nylon cable ties containing specially formulated heat stabilizers provide additional thermal endurance. Heat stabilized nylons are engineered for continuous exposure to temperatures above 185 degrees Fahrenheit, which meets UL standard for electrical applications.

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APPLICATIONS

3 used as fibres in textile industries- shirting, sarees, shawls,bed covers etc.

4. in making ropes and fishing nets.5. Due to their chemical resistance Nylon-66 is used in paints and coatings.

6.As reinforcement materials in plastics and rubbers

7. In making all kinds of brushes and scrubbers

ADVANTAGES1. It can operate at a very slightly higher

temperature2. Nylon 66 Sheet is also that it is slightly harder as

an engineering plastic.

DRAWBACKS

3. On long exposure to sunlight they become brittle.

2. With aging, white nylons turn yellowish & coloured nylons fade out

3. Nylon 66 Sheet which are firstly that the size range availability is slightly more limited than Nylon 6 Sheet

4. It is also very slightly more costly, the other reason is that it is also very slightly less impact resistant but as with the advantages, these differences between the two Nylon Sheet grades are minimal.

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