Main features of the plasticizer

The plasticizer is a high boiling point ,
Low volatile substances , the 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  Dioctyl phthalate 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 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 zinc borate flame retardant  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 polymer , said comonomer added
As an internal plasticizer , such as vinyl chloride and vinyl acetate copolymer , vinyl acetate as  chromium oxide 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 .