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Wetin na di rizin dɛn we mek PVC plastic de yɔlɔ?

Views: 42     Author: Sayt Ɛditɔ Pɔblish Taym: 2022-01-05 Ɔrijin: Ples

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Wetin na di rizin dɛn we mek PVC plastic de yɔlɔ?


di yכlכ we di plastic dεm de yכlכ de tכk bכt di chen riakshכn we di chen lεk polimכr mכlikul chen de brok כnda ay tεmprachכ, כksidayz invayroment, כ כnda di akshכn fכ ultravayolet, infrarεd, εn maykro כganism dεm, we de trigεr fri radikal dεtachmεnt.

Di kɔmɔn we aw plastic dɛn kin yɔlɔ mɔ na dɛn tin ya:

1. Ultravayolɛt raytin

di layt we di san de rayt to di כta ay layεr na kכntinyu spεktrum wit wevlεngth we de 0.7-3000nm, we 300-400nm כltravayolet rεdyushכn na di men kכz fכ di polimכr dεgradashכn. εn di enεji fכ fכtכn dεm na di כltravayolet rεnj fכ 290-400nm na 300-419kJ/E, we hכy pas di bon enεji fכ sכm tכpik kεmikכl bכnd dεm na polimכr dεm.


2. Di inflכεns כf hεt stεbyulayz

Difrɛn ɔt stebyulayza dɛn gɛt difrɛn ifɛkt pan di layt stebiliti fɔ PVC.

Ba/Cd εn כrganotin kכbכksilayt kכmpawnd dεm (lεk maleic anhydride εsta כrganotin stεbyulayz) kin gi sכm digri fכ UV stεbiliti to PVC profayl dεm we dεn yuz na do, we כrganotin kכmpawnd dεm we gεt sכlfa (lεk sכlfa Alkohol כrganik tin stεbyulayz) de gi limited layt stεbiliti. Di layt stεbiliti fכ di di-sכlt lid stεbyulayza hכy pas di wan fכ di tri-sכlt lid stεbyulayza.


3. Di inflכεns fכ di antioksidant sistεm

Naw, di stebyulayza dɛn we PVC profayl manifakta dɛn de yuz na men wan kɔmpɔzit stebyulayza dɛn. apat frכm di men kכmpawnd we de stεbyul di dεgradashכn fכ PVC, dεn inklud bak lכbrik sistεm, antioksidant sistεm εn כda stεbyul sistεm.

di antioxidant sistεm kin inklud fεnolik stεbyulayza dεm εn fכsfayt kכ-stabilizεr dεm. Dɛn kɔmpawnd ya kin gɛt ɔrganik dɔti we izi fɔ chenj, ɛn apat frɔm dat, dɛn kin gɛt diskɔloreshɔn riakshɔn ɔnda di akshɔn we layt, ɔksijɛn, ɛn wata de du.


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