No Added Chemicals

Chain polymerisation is probably the most common polymerisation that is widely used, either for lab or industrial scale and one the example is free radical polymerisation. There is an obvious reason why this is callen free radical polymerisation and it is simply due to using radical species as the active species. In the same way with step polymerisation , this section will discuss mainly about ita kinetics.

Sashimi is one of the most famous Japanese cuisine which is made from raw fish. One of this delicacy and the most expensive one is made from a species of pufferfish which is known as fugu in Japan, the most notable one is torafugu or tiger pufferfish ( Takifugu rubipes ). One thing that make this type of sashimi is so expensive is due to labourous preparation and the adequate preparation is necessary since this fish is so toxic. This high toxicity is due to a compound called tetrodotoxin (TTX).

One of the processes to make polymers is called step polymerisation and this process used to be called a condensation polymerisation due to the formation small byproduct or condensate. In this section, we will see the chemistry behind step polymerisations especially in polyesterification and its kinetics.

Polymers are well known for its wide range of application in daily life. One of the main factor that determine its application is by tuning its physical properties. This section will discuss about the properties in solution and in solid state, especially about melting temperature  T m  and glass transition temperature  T g . Lastly, we will see the physical properties of elastomers.

One of the chemical properties of a molecule is its molecular weight which is unique for every molecule. However, in synthetic polymer this is a bit of problem because of the nature of polymerisation reaction which produces different lengths of polymeric chains. This means synthetic polymers are polydisperse, no unique molecular weight, unlike small molecules. Therefore, the molecular weight of polymers is measured using molecular weight distribution (MWD).