Cov saw hlau molecular ntawm PET yas muaj cov crystallinity siab thiab kev taw qhia, uas ua rau nws tsis tshua muaj tshuaj lom neeg nkag mus thiab yaig. Vim tias cov tshuaj feem ntau yuav tsum nkag mus rau ntawm cov ntaub ntawv yas thaum lawv corrode, PET yas tau nruj nreem kaw cov saw hlau molecular uas tsis yooj yim nkag los ntawm cov tshuaj, yog li txhim kho nws cov tshuaj stability.
Tsis tas li ntawd, PET yas kuj muaj hydrolysis zoo. Txawm hais tias nws muaj ester raws li cov qauv, cov tshuaj tiv thaiv hydrolysis yog qhov nyuaj rau tshwm sim ntawm chav tsev kub thiab siab. Tsuas yog nyob rau hauv qhov kub thiab txias, kev kub siab, acidic lossis alkaline ib puag ncig, PET yas yuav raug cov tshuaj tiv thaiv hydrolysis, tab sis qhov no, cov tshuaj tiv thaiv hydrolysis qeeb thiab yuav tsis sai sai ua rau txo qis hauv cov khoom siv.
Zuag qhia tag nrho, chemical stability ntawm PET plastics feem ntau tshwm sim hauv cov hauv qab no:
Nws muaj kev tiv thaiv zoo rau feem ntau cov kuab tshuaj organic, acids thiab cov hauv paus, thiab tsis yooj yim corroded los yog puas los ntawm cov tshuaj no.
Nws muaj crystallinity siab thiab kev taw qhia, thiab tsis yooj yim nkag mus los yog eroded los ntawm cov tshuaj lom neeg.
Nws muaj qhov zoo hydrolysis tsis kam thiab tsis ua rau cov tshuaj tiv thaiv hydrolysis ntawm chav tsev kub thiab siab.
Nws yuav tsum tau muab sau tseg tias txawm hais tias PET yas muaj cov tshuaj ruaj khov zoo, nws tseem yuav muaj qee yam tshuaj tiv thaiv thaum raug cov kua qaub, cov hauv paus, thiab lwm yam tshuaj rau lub sijhawm ntev. Tsis tas li ntawd, nyob rau hauv tej yam kev mob tshwj xeeb xws li kub siab, siab siab, thiab lwm yam, PET yas kuj yuav raug tshuaj lom neeg. Yog li ntawd, hauv kev siv tswv yim, nws yog ib qho tsim nyog kom tsis txhob raug cov kua qaub ntev ntev, muaj zog hauv paus, thiab lwm yam tshuaj lom neeg, thiab kom tsis txhob muab PET yas tso rau hauv qhov chaw tshwj xeeb uas tau hais tseg.