Plasticizers xa mus rau cov khoom siv organic uas ua kom cov yas yas, txhim kho cov dej ntawm cov resins thaum lub sij hawm molding thiab ua kom cov khoom hloov tau. Nws feem ntau yog ib co boiling, nyuaj-rau-volatile viscous kua los yog tsawg-melting khoom, uas feem ntau tsis chemically reacts nrog plastics.
Lub plasticizer yuav tsum xub muaj kev sib raug zoo nrog cov resin. Qhov zoo dua qhov kev sib raug zoo, qhov zoo dua cov nyhuv plasticizing. Ntxiv cov plasticizers txo cov iav hloov pauv ntawm cov yas, ua rau cov yas tawv thiab tawv tawv muag thiab hloov tau. Feem ntau, cov yas yas kuj yuav tsum tsis muaj xim, tsis muaj tshuaj lom, tsis muaj ntxhiab, lub teeb-resistant, kub-resistant, txias-resistant, tsis tshua muaj volatility thiab tsiv teb tsaws, tsis-flammable thiab chemically ruaj khov, pheej yig thiab yooj yim kom tau. Hauv kev xyaum, ib qho plasticizer tsis tuaj yeem ua tiav tag nrho cov kev xav tau saum toj no.
Plasticizers are divided into main plasticizers, namely solvent-based plasticizers; auxiliary plasticizers, namely non-solvent-based plasticizers; catalyst-based plasticizers; and phthalates according to their chemical structures. , fatty acid esters, phosphate esters, polyesters, epoxy esters, chlorine-containing compounds, etc. Commonly used plasticizers are dibutyl phthalate (DBP), dioctyl phthalate (DOP), epoxidized soybean oil, tricresyl phosphate, triphenyl phosphate, dioctyl sebacate, Chlorinated paraffin, etc.
PVC yog qhov kawg siv ntawm cov plasticizers. Cov ntaub ntawv tseem ceeb ntawm PVC nrog cov yas ntxiv yog cov hlau, cable, hauv pem teb thiab phab ntsa cladding, cov khoom siv hauv tsev, tsheb thiab cov khoom ntim.