I-Poly(ethylene terephthalate) (PET)iyinto yokupakisha evame ukusetshenziswa embonini yokudla neziphuzo; ngakho-ke, ukuzinza kwayo kokushisa kuye kwafundwa ngabaphenyi abaningi. Ezinye zalezi zifundo zigcizelele ekukhiqizweni kwe-acetaldehyde (AA). Ukuba khona kwe-AA ngaphakathi kwezinto ze-PET kuyakhathaza ngoba inezinga lokubila ezingeni lokushisa legumbi noma ngaphansi kwalo (21_C). Lokhu kuguquguquka kwezinga lokushisa eliphansi kuzoyivumela ukuthi isakazeke isuka ku-PET iye emkhathini noma kunoma yimuphi umkhiqizo ngaphakathi kwesitsha. Ukusabalala kwe-AA emikhiqizweni eminingi kufanele kuncishiswe, njengoba ukunambitheka/iphunga elingokwemvelo le-AA kwaziwa ukuthi lithinta ukunambitheka kwezinye iziphuzo nokudla okupakishiwe. Kunezindlela eziningana ezibikiwe zokunciphisa inani le-AA elikhiqizwa ngesikhathi sokuncibilika nokucubungula i-PET. Enye indlela ukwenza ngcono izimo zokucubungula lapho kukhiqizwa khona izitsha ze-PET. Lezi ziguquguquko, ezifaka izinga lokushisa lokuncibilika, isikhathi sokuhlala, kanye nezinga lokucheba, kuboniswe ukuthi kuthinta kakhulu ukukhiqizwa kwe-AA. Indlela yesibili ukusetshenziswa kwama-resin e-PET aklanyelwe ngokukhethekile ukunciphisa ukukhiqizwa kwe-AA ngesikhathi sokukhiqizwa kwezitsha. Lawa ma-resin aziwa kakhulu ngokuthi ''ama-resin e-PET ebanga lamanzi''. Indlela yesithathu ukusebenzisa izithasiselo ezaziwa ngokuthi ama-acetaldehyde scavenging agents.

Ama-scavenger e-AA aklanyelwe ukusebenzisana nanoma iyiphi i-AA ekhiqizwa ngesikhathi sokucubungula i-PET. Lawa ma-scavenger awanciphisi ukuwohloka kwe-PET noma ukwakheka kwe-acetaldehyde. Kodwa-ke, anganciphisa inani le-AA elikwazi ukusabalalisa liphume esitsheni futhi ngaleyo ndlela linciphise noma yimiphi imiphumela kokuqukethwe okupakishiwe. Ukusebenzisana kwama-agent okususa i-AA kucatshangwa ukuthi kwenzeka ngokwezindlela ezintathu ezahlukene, kuye ngesakhiwo sama-molecule se-scavenger ethile. Uhlobo lokuqala lwendlela yokususa i-scavenger luyi-chemical reaction. Kulesi simo i-AA kanye ne-agent yokususa i-scavenger basabela ukwakha isibopho samakhemikhali, okudala okungenani umkhiqizo omusha owodwa. Ohlotsheni lwesibili lwendlela yokususa i-scavenger kwakheka i-inclusion complex. Lokhu kwenzeka lapho i-AA ingena emgodini wangaphakathi we-agent yokususa i-scavenger futhi ibanjwe yi-hydrogen bonding, okuholela enkingeni yama-molecule amabili ahlukene axhunywe ngezibopho zamakhemikhali zesibili. Uhlobo lwesithathu lwendlela yokususa i-scavenger luhlanganisa ukuguqulwa kwe-AA ibe olunye uhlobo lwamakhemikhali ngokusebenzisana kwayo ne-catalyst. Ukuguqulwa kwe-AA ibe yikhemikhali ehlukile, njenge-acetic acid, kungandisa izinga lokubila kwe-migrant ngaleyo ndlela kunciphise ikhono layo lokushintsha ukunambitheka kokudla noma isiphuzo esipakishiwe.