plasticizer

The plasticizer is a high boiling point,
Low volatile substances, the organic pigments  molecular structure portion having a polar and non-polar parts. Plasticizer molecules can be inserted between the polymer chains, weakening intermolecular forces, increasing the distance between the polymer chains and space, to increase the plastic polymer, polymer processing temperature reduction. Case of PVC plastics. Because PVC child so strong intermolecular forces, the higher the processing temperature, prone to degradation. In PVC plasticizer is added and heated, the plasticizer molecules can be inserted between the PVC stabilizer for pipe  molecular chains of PVC,
PVC plasticizer polar polar part and part of the role, after cooling, the plasticizer molecules remain in the inserted position,
The non-polar part of the plasticizer to play a role in isolation, weakening PVC intermolecular forces,
Achieve improved ductility and flexibility of PVC, polyvinyl chloride processing temperature reduction purposes. The polar part of the plasticizer molecules is mainly an ester group, an epoxy group, an ether bond, a cyano group, a chloro group and other polar groups; non-polar part of the main chain methylene and alkyl chains. Adding plasticizers in polymers called external plasticizer;
The formation of the  chromium oxide polymer, said comonomer added
As an internal plasticizer, such as vinyl chloride and vinyl acetate copolymer, vinyl acetate as the internal plasticizer. Plasticizer:
 ① reduce melt viscosity;
 ② to increase the flexibility of the polymer;
 ③ increase the elongation at break of the polymer;
 ④ lower polymer molding processing temperature;
 ⑤ improve processing characteristics forming polymer;
 ⑥ improve the impact properties of polymers;
 ⑦ improve low temperature polymer Qu Xing;
 ⑧ reduce polymer surface hardness.