Dioctyl terephthalate (bis (2-ethylhexyl) benzene-1,4-dicarboxylate lossis Di (2-ethylhexyl) terephthalate), feem ntau hais DOTP lossis DEHT, yog cov organic sib xyaw nrog tus qauv C6H4 (CO2C8H17) 2. Nws yog non-phthalate plasticizer, yog tus tuag ntawm terephthalic acid thiab cov ceg ntoo-cov saw 2-ethylhexanol. Cov kua roj uas tsis muaj kob uas siv rau cov mos mos PVC plasma paub txog tshuaj lom neeg zoo sib xws nrog cov hom phiaj phthalates xws li DEHP thiab DINP, tab sis tsis muaj lub siab tswj qhov tsis zoo. Nws muaj cov khoom zoo nkauj zoo nkauj thiab siv tau los hloov ncaj qha rau DEHP thiab DINP hauv ntau daim ntawv thov.
Ib txoj kev tsim khoom lag luam entails cov transesterification ntawm dimethyl terephthalate nrog 2-ethylhexanol:
C6H4 (CO) 2 (OCH3) 2 + 2 C8H17OH → C6H4 (CO2 C8H17) 2 + 2CH3OH
Ib txoj kev thib ob ntawm kev tsim khoom yog qhov ncaj qha esterification ntawm terephthalic acid nrog 2-ethylhexanol:
C6H4 (CO2H) 2 + 2 C8H17OH → C6H4 (CO2 C8H17) 2 + 2H2O
Siv
DOTP yog cov laj thawj cov khoom yas uas suav tias yog kev nyab xeeb dua li ortho-phthalate plasticizers vim tias nws cov tshuaj lom zoo nkauj. Lub terephthalates tsis muaj ib qho kev nthuav dav ntawm peroxisome ntawm daim siab enzymes uas qee cov ortho-phthalates tau qhia hauv kev tshawb fawb ntau. [1] Nws tau siv rau hauv cov ntawv thov xws li extrusion, calendering, txhaj tshuaj moulding, tig moulding, poob moulding, zuaj moulding thiab txheej.
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