Physicochemical Properties Ntawm Plasticizers

Muaj ntau hom plasticizers, xws li phthalates, aliphatic dibasic acid esters, fatty acid esters, benzene polyacids, polyols, epoxides, alkyl sulfonates, thiab lwm yam los ntawm phthalic acid. Tam sim no, nws yog lub cev tseem ceeb ntawm plasticizer, uas feem ntau yog tsim los ntawm lub dav hlau nruj nreem muaj lub nplhaib thiab ob lub hnab yas uas tsis yog-linear roj chains.
Phthalate esters feem ntau yog xim tsis muaj pob tshab oily viscous kua nyob rau hauv chav tsev kub, teej tug mus rau cov roj soluble tshuaj, soluble nyob rau hauv cov organic solvents xws li methanol, ethanol, ether, thiab lwm yam. Feem ntau ntawm lawv yog cov kua uas muaj boiling point thiab tsawg volatility, thaum ob peb yog. cov khoom uas tsis tshua muaj melting point. Lawv cov synthesis feem ntau yog los ntawm catalytic oxidation ntawm naphthalene thiab o-xylene los tsim phthalic anhydride. Phthalic anhydride ces esterified nrog ntau yam cawv kom tau. Nws yog ib qho nyuaj rau yaj hauv dej, qhov tshwj xeeb lub ntiajteb txawj nqus yog ze rau ntawm cov dej, thiab kev sib raug zoo ntawm cov yas molecules yog qhov zoo, thiab ob qho tib si yog ua ke los ntawm hydrogen bonds los yog van der Waals rog, thiab muaj cov tshuaj lom neeg ywj pheej. Nws tuaj yeem ua kom cov ductility thiab yooj ntawm cov ntaub ntawv polymer, txhim kho kev ua haujlwm, thiab ua kom lub zog ntawm cov khoom yas.