Cov nyhuv synergistic ntawm cov organic tin thiab hmoov calcium zinc stabilizers hauv polyvinyl chloride (PVC):
Organic tin stabilizers (thiol methyl tin) yog ib hom siv PVC kub stabilizer. Lawv hnov mob nrog acidic hydrogen chloride (HCl) hauv PVC los tsim cov ntsev tsis muaj teeb meem (xws li tin chloride), yog li tiv thaiv kev sib sau ntawm HCl thiab txo cov degradation thiab yellowing ntawm PVC cov ntaub ntawv.
Hmoov calcium zinc stabilizer yog sib xyaw ntawm calcium thiab zinc ntsev, feem ntau ntxiv rau hauv daim ntawv ntawm cov hmoov zoo rau PVC. Ob leeg calcium thiab zinc ions muaj peev xwm ua kom ruaj khov PVC. Calcium ions tuaj yeem cuam tshuam cov kua qaub uas tsim hauv PVC thiab tsim cov calcium ntsev ruaj khov. Zinc ions hnov mob nrog hydrogen peroxide (HCl) hauv PVC los tsim cov tshuaj tsis muaj kab mob thiab tiv thaiv kev sib sau ntawm HCl.
Thaum cov organic tin thiab hmoov calcium zinc stabilizers sib koom ua ke hauv PVC, lawv tuaj yeem txhawb nqa ib leeg thiab txhim kho lub peev xwm kho HCl. Organic tin tuaj yeem muab kev muaj peev xwm ua kom tsis muaj zog ntxiv kom txo qis HCl ntau dua, thaum hmoov calcium zinc stabilizers tuaj yeem muab cov calcium thiab zinc ions ntau ntxiv, tiv thaiv ntxiv ntawm HCl. Los ntawm qhov kev sib koom ua ke no, cov organic tin thiab hmoov calcium zinc stabilizers tuaj yeem txhim kho cov thermal stability ntawm PVC cov ntaub ntawv, txhim kho lawv lub neej kev pab thiab kev ua haujlwm ruaj khov.
Nws yuav tsum raug sau tseg tias tus nqi thiab feem ntawm cov organic tin thiab calcium zinc stabilizers yuav tsum tau hloov kho kom haum raws li cov kev cai tshwj xeeb thiab kev siv ib puag ncig ntawm PVC cov khoom, txhawm rau ua kom muaj txiaj ntsig zoo tshaj plaws. Nyob rau tib lub sijhawm, nws yuav tsum tau ua tib zoo saib xyuas kev nyab xeeb thiab ib puag ncig teeb meem thaum siv kom tsis txhob muaj kev phom sij rau tib neeg kev noj qab haus huv thiab ib puag ncig.
Post lub sij hawm: Nov-30-2023
