Plasticizer role is: to reduce the glass transition temperature of the polymer, increasing plasticity, easy molding, its mechanism of action can be broadly divided into two types:
1. Non-polar plasticizer
The main effect is inserted between the polymer chains, increasing the distance between the molecular chains, thus weakening the van der Waals forces between them, so that the molecular chain is easy activity, at a lower temperature of the glass transition can occur. The more the amount of plasticizer, the greater the isolation, and small molecules trading activity, easy to make the polymer viscosity.
2. polar plasticizer
Its main role is to: polar groups plasticizer and polymer molecule polar groups interact, instead of the role of polar polymer molecules, thereby weakening the van der Waals forces between polymers, Therefore, to achieve the purpose of plasticized. Plasticizer performance is directly proportional to the number of moles and plasticizers. The key can be plasticized plasticizer is that it changes the forces between macromolecules.
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