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Txheej
anti yellowing rau engineering plasticsNtxiv nrog rau photooxidation, zaj duab xis tsim cov resin nyob rau hauv lub txheej yuav degraded los ntawm hydrolysis, tshwj xeeb tshaj yog thaum lub kub ntawm txheej yog nce nyob rau hauv lub hnub ci siab.Nyob rau hauv cov xwm txheej no, absorbed dej molecules nyob rau hauv lub txheej tuaj yeem tawm tsam covalent bonds hauv cov resin thiab txiav cov polymer chains, uas ua rau qhov hnyav molecular.Polyester thiab alkyd resins muaj qhov cuam tshuam rau cov nyhuv no ntau dua li polyurethanes thiab epoxies.
