I-Poly(i-ethylene terephthalate) (PET)iyimpahla yokupakisha evame ukusetshenziswa yimboni yokudla neziphuzo; ngakho-ke, ukuzinza kwayo okushisayo kuye kwafundwa ngabaphenyi abaningi. Ezinye zalezi zifundo ziye zagcizelela ukukhiqizwa kwe-acetaldehyde (AA). Ukuba khona kwe-AA ngaphakathi kwezihloko ze-PET kuyakhathaza ngoba inendawo yokubilisa ezingeni lokushisa elingaphansi noma elingaphansi kwegumbi (21_C). Lokhu kuguquguquka kwezinga lokushisa eliphansi kuzoyivumela ukuthi isakazeke isuka ku-PET iye emkhathini noma yimuphi umkhiqizo ongaphakathi kwesitsha. Ukusatshalaliswa kwe-AA emikhiqizweni eminingi kufanele kuncishiswe, njengoba ukunambitheka/iphunga le-AA laziwa ngokuthi lithinta ukunambitheka kwezinye iziphuzo ezipakishiwe nokudla. Kunezindlela ezimbalwa ezibikiwe zokunciphisa amanani e-AA akhiqizwa ngesikhathi sokuncibilika nokucutshungulwa kwe-PET. Enye indlela iwukuthuthukisa izimo zokucubungula okukhiqizwa ngaphansi kwazo iziqukathi ze-PET. Lokhu okuguquguqukayo, okuhlanganisa izinga lokushisa elincibilikayo, isikhathi sokuhlala, nezinga le-shear, kuboniswe ukuthi kuthinta kakhulu isizukulwane se-AA. Indlela yesibili ukusetshenziswa kwe-PET resins eklanyelwe ngokukhethekile ukunciphisa ukukhiqizwa kwe-AA ngesikhathi sokukhiqizwa kweziqukathi. Lawa ma-resin aziwa kakhulu ngokuthi ''izinga lamanzi i-PET resins''. Indlela yesithathu ukusebenzisa izithasiselo ezaziwa ngokuthi ama-acetaldehyde scavenging agents.

Ama-AA scavengers aklanyelwe ukusebenzisana nanoma iyiphi i-AA ekhiqizwa ngesikhathi sokucutshungulwa kwe-PET. Lawa ma-scavenger awakunciphisi ukuwohloka kwe-PET noma ukwakheka kwe-acetaldehyde. Bangakwazi; kodwa-ke, khawula inani le-AA elikwazi ukusakazeka esitsheni futhi ngaleyo ndlela unciphise noma yimiphi imiphumela kokuqukethwe okupakishiwe. Ukusebenzisana kwama-ejenti akhipha udoti ne-AA kuhlelwa ukuthi kwenzeke ngokwezinqubo ezintathu ezihlukene, kuye ngesakhiwo samangqamuzana somdoti othile. Uhlobo lokuqala lwe-scavening mechanism ukusabela kwamakhemikhali. Kulesi simo i-AA kanye ne-ejenti yokukhipha isisu basabela ukwakha isibopho samakhemikhali, kwakheka okungenani umkhiqizo owodwa omusha. Ohlotsheni lwesibili lwe-scavenging mechanism kwakhiwa. Lokhu kwenzeka lapho i-AA ingena emgodini wangaphakathi we-ejenti yokukhipha amanzi futhi ibanjwe i-hydrogen bonding, okuholela enkingeni yama-molecule amabili ahlukene axhunywe ngokusebenzisa izibopho zamakhemikhali zesibili. Uhlobo lwesithathu lwendlela yokulahla ihlanganisa ukuguqulwa kwe-AA ibe olunye uhlobo lwamakhemikhali ngokusebenzisana kwayo ne-catalyst. Ukuguqulwa kwe-AA ibe ikhemikhali ehlukile, njenge-acetic acid, kungakhuphula indawo yokubilisa yomuntu ofudukayo futhi ngaleyo ndlela kunciphise ikhono layo lokushintsha ukunambitheka kokudla okupakishiwe noma isiphuzo.