In which classes, the polymers are classified on the basis of molecular forces?
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Answered by
17
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=) Polymers are classified in four groups :-
(i) Elastomers .
(ii) Fibres .
(iii) Thermoplastic polymers .
(iv) Thermosetting polymers .
In detail :-
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1.) Elastomers =) In elastomers the intermolecular forces are very weak does the electromeric character is high . Hence , the molecule can be stretched under stress and take its original form when the stress is removed . Weak vanderwall forces are present among the polymer chain such Polymers can be stretched over 10 times of the normal length elastomers have the randomly recoiled molecular size of a regular shape which have few crosslinks . some examples of elastomers are natural rubber , vulcanized rubber and Buna-S .
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2.) Fibres =) In this type of polymers the intermolecular forces are strongest . These forces are like H-bonds or dipole-dipole interactions due to the strong forces , fibres show high tensible strength and low elasticity . They are thin , long and thread like and can be woven into fabrics they have high melting points and low solubility . Some examples are nylon , polyester .
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3.) Thermoplastic polymers =) In thermoplastic the intermolecular forces of attraction is in between those of elastomers and fibres . These are linear Polymers and can be moulded into desired shape by heating and then cooling . This softening on heating and rigidness on cooling can be repeated many times without any change in Mechanical properties and chemical composition of plastic . Some examples of polythene , polystyrene .
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4.) Thermosetting polymers =) These are the low molecular weight , semifluid type of polymers , which becomes very hard , influenceable and insoluble on heating . Excessive crosslinking among the polymer chains take place on heating and three dimensional solid network is formed . Thermosetting Polymers cannot be remelted again like thermoplastic Polymers .Some examples are bakelite , melamine formaldehyde resin .
___________________________
HOPE , IT HELPS ... ✌️
___________________________
=) Polymers are classified in four groups :-
(i) Elastomers .
(ii) Fibres .
(iii) Thermoplastic polymers .
(iv) Thermosetting polymers .
In detail :-
==============================
1.) Elastomers =) In elastomers the intermolecular forces are very weak does the electromeric character is high . Hence , the molecule can be stretched under stress and take its original form when the stress is removed . Weak vanderwall forces are present among the polymer chain such Polymers can be stretched over 10 times of the normal length elastomers have the randomly recoiled molecular size of a regular shape which have few crosslinks . some examples of elastomers are natural rubber , vulcanized rubber and Buna-S .
==============================
2.) Fibres =) In this type of polymers the intermolecular forces are strongest . These forces are like H-bonds or dipole-dipole interactions due to the strong forces , fibres show high tensible strength and low elasticity . They are thin , long and thread like and can be woven into fabrics they have high melting points and low solubility . Some examples are nylon , polyester .
================================
3.) Thermoplastic polymers =) In thermoplastic the intermolecular forces of attraction is in between those of elastomers and fibres . These are linear Polymers and can be moulded into desired shape by heating and then cooling . This softening on heating and rigidness on cooling can be repeated many times without any change in Mechanical properties and chemical composition of plastic . Some examples of polythene , polystyrene .
=================================
4.) Thermosetting polymers =) These are the low molecular weight , semifluid type of polymers , which becomes very hard , influenceable and insoluble on heating . Excessive crosslinking among the polymer chains take place on heating and three dimensional solid network is formed . Thermosetting Polymers cannot be remelted again like thermoplastic Polymers .Some examples are bakelite , melamine formaldehyde resin .
___________________________
HOPE , IT HELPS ... ✌️
Answered by
2
If we consider the intermolecular forces magnitude that is the part of polymers.
The group can be classified in the four main parts which are mentioned below;
Thermoplastic plastic
Fibres
Elastomers
Thermosetting polymers
These are the main classification of the polymers if we consider the intermolecular forces.
However, they will differ on the basis of different properties.
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