Polymers and their properties
                     Polymers and their 
properties
What are Polymers?
 A polymer is a huge atom or a macromolecule which basically is a 
blend of numerous subunits. 
 Polymers might be normally found in plants and creatures or 
possibly man-made (manufactured polymers). 
 Various polymers have various remarkable physical and compound 
properties.
Classification 
 Natural Polymers: 
They happen normally and are found in plants and creatures. 
 Semi-engineered Polymers: 
They are gotten from normally happening polymers and experience 
further concoction adjustment. 
 Engineered Polymers: 
These are man-made polymers. Plastic is the most well-known and 
generally utilized engineered polymer.
Linear Polymers
 The structure of polymers containing long and 
straight chains fall into this classification. 
 PVC, for example, polyvinyl chloride is to a 
great extent utilized for making funnels and 
electric links is a case of a direct polymer.
Branched-chain and Linked chain
 Expanded chain Polymers 
At the point when straight chains of a polymer structure 
branches, at that point, such polymers are sorted as 
spread chain polymers. For instance, Low-thickness 
polythene. 
 Cross-connected Polymers 
They are made out of bi-functional and tri-functional 
monomers. They have a more grounded covalent bond in         Source: Google Images
contrast with other straight polymers. Bakelite and 
melamine are models in this class.
Classification Based on Monomers
 Homomer: In this sort, a solitary kind of monomer unit is 
available.
 For instance, Polyethene 
 Heteropolymer or co-polymer: It comprises of various sorts of 
monomer units. 
For instance, nylon - 6, 6
Biodegradable Polymers
 The polymers which are corrupted and rotted by 
microorganisms like microscopic organisms are known as 
biodegradable polymers. 
 These kinds of polymers are utilized in careful gauzes, case 
coatings and in medical procedure. 
 For instance, Poly hydroxybutyrate co-vel [PHBV]
Physical Properties
 As chain length and cross-connecting builds the 
elasticity of the polymer increments. 
 Polymers don't soften, they change state from 
crystalline to semi-crystalline.
Chemical Properties
 Contrasted with customary particles with various 
side atoms, the polymer is empowered with 
hydrogen holding and ionic holding bringing about 
better cross-connecting quality. 
 Dipole-dipole holding side chains empower the 
polymer for high adaptability. 
 Polymers with Van der Waals powers connecting 
binds are known to be feeble, yet give the polymer 
a low liquefying point.
Optical Properties
 Because of their capacity to change their refractive 
list with temperature as on account of PMMA and 
HEMA: MMA, they are utilized in lasers for 
applications in spectroscopy and expository 
applications.