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Polyester, Polycarbonate, Polyamide and Polyurethane.

Polyester, Polycarbonate, Polyamide and Polyurethane;

Polyester

Ester linkage; In ester linkage an oxygen atom (irrespective of position) is bonded to carbonyl group.
The polymer containing ester linkage is called Polyester.
For example; glyptal, terylene,PHBV and Polyglycolic acid.

Polycarbonate

Carbonate linkage; In carbonate linkage two oxygen atoms are bonded to carbonyl group.
The polymer containing many carbonate linkage is called Polycarbonate.

Polyamide

Amide linkage; In amide linkage -NH-group (irrespective of position) is bonded to carbonyl group.
The polymer containing many amide linkage is called Polyamide.
For example; Nylon6, Nylon6,6, Kevlar, Nylon-2-Nylon-6.

Polyurethane

Urethane linkage; In urethane linkage an -NH-group and an oxygen atom is bonded to carbonyl group.
The polymer containing many urethane linkage is called Polyurethane.

Questions on Polyester, Polycarbonate, Polyamide and Polyurethane;

Q1) What is Polyester?
Ans)A polymer containing ester linkage is called Polyester.
Q2) What is Polycarbonate?
Ans) A polymer containing carbonate linkage is called Polycarbonate.
Q3) What is Polyamide?
Ans) A polymer containing amide linkage is called Polyamide.
Q4) What is Polyurethane?
Ans) A polymer containing urethane linkage is called Polyurethane.

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