Internal & External Plasticizer

Internal & External Plasticizer:


1/ Internal plasticizer:
The glass transition temperature of many homopolymers can be lowered by co-polymerization with small quantities of another suitable monomer. This process is generally referred to as internal plasticizer.

2/ External plasticizer:
Lowering of glass transition temperature of homopolymer by the physical addition of a plasticizer is known as external plasticization.