Biodegradable yas rau Environmental Protection thiab Hygiene

Biodegradable yas feem ntau suav hais tias yog hom yas uas tuaj yeem decomposed rau hauv cov khoom hnyav molecular los ntawm hnub ci hluav taws xob lossis cov kab mob hauv av. Ntxiv nrog rau nws cov degradability, nws yuav tsum muaj cov khoom uas yooj yim rau kev ua thiab ua tau raws li cov kev cai siv. Qhov teeb meem ntawm lub hnub ci ntawm cov ntaub ntawv polymer yog kev sib xyaw ua ke ntawm ultraviolet lub teeb thiab oxygen, yog li nws hu ua photooxidative degradation. Noj polyolefins ua piv txwv, photooxidation feem ntau ua rau cov saw tawg lossis hla kev sib txuas ntawm cov polymers, nrog rau kev tsim ntawm qee cov pa oxygen ua haujlwm, xws li ketones, carboxylic acids, peroxides, thiab cawv. Nws cov degradation feem ntau yog los ntawm cov catalyst residues nyob rau hauv lub polymer, nrog rau cov pib tshwm sim ntawm peroxides thiab carbonyls qhia thaum lub sij hawm ua.