Tshuaj qauv molecular ntawm polyethylene

Cov tshuaj lom neeg molecular qauv ntawm polyethylene yog qhov ruaj khov thiab nyuaj heev rau degrade, yog li nws siv sijhawm 300 xyoo rau cov hnab yas kom yaj kom zoo; thaum cov qauv tshuaj ntawm polypropylene tsis yog tawv, thiab cov xov lag luam molecular yog yooj yim tawg, yog li nws tuaj yeem ua kom zoo, thiab nkag mus rau ib puag ncig puag ncig tom ntej nyob rau hauv daim ntawv tsis muaj tshuaj lom, tsis yog-lub hnab khw yuav decompose tiav hauv 90 hnub. Ntxiv mus, lub hnab ntim khoom tsis-hnab yuav siv tau ntau dua 10 zaug, thiab qhov kev ua qias tuaj ib puag ncig ntawm cov khoom lag luam muab pov tseg tsuas yog 10% ntawm qhov ntawm lub hnab yas.