Question

hoe are polymers classified on the basis of structure

Answer 1

Answer:

Polymers are classified on the basis of structure as follows:

1. Linear polymers: These polymers are formed of long straight chains. They can be depicted as:

For e.g., high density polythene (HDP), polyvinyl chloride, etc.

2. Branched chain polymers: These polymers are basically linear chain polymers with some branches. These polymers are represented as:

For e.g., low density polythene (LDP), amylopectin, etc.

3. Cross-linked or Network polymers: These polymers have many cross-linking bonds that give rise to a network-like structure. These polymers contain bi-functional and tri-functional monomers and strong covalent bonds between various linear polymer chains. Examples of such polymers include bakelite and melmac.

Answer 2

Answer:

linear, branch and crosslinked/network

Explanation:

Classification of polymers based on their structure can be of three types:

(i) Linear polymers:

These polymers are similar in structure to a long straight chain which identical links connected to each other. eg:- PVC (Poly-vinyl chloride)

(ii) Branch chain polymers:

As the title describes, the structure of these polymers is like branches originating at random points from a single linear chain. eg:- Low-density polyethene (LDPE) used in  plastic bags and general purpose containers is a common example

(iii) Crosslinked or Network polymers:

In this type of polymers,  monomers are linked together to form a three-dimensional network. Eg:- Melamine