Which factor imparts crystalline nature to a polymer like nylon?
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Solution
Nylon are polyamide polymers.
It consists of many monomeric units joined by amide linkage.
One molecule of nylon or one polymer chain gets attracted to another by intermolecular H−bonding, which is present between the two terminal groups, −C=Oand−NH in nylon.
Also, the backbone structure of nylon is regular and symmetrical. Strong intermolecular forces like hydrogen bonding lead to close packing of chains that impart crystalline character
These factors together lead to close and symmetrical packing of molecules which imparts the crystalline nature to nylon.