1. Txhim kho cov cua sov ntawm PVC
Cov ntaub ntawv PVC yog qhov yooj yim rau thermal degradation nyob rau hauv qhov kub thiab txias ib puag ncig, ua rau txo qis hauv cov khoom siv. Los ntawm kev siv hmoov crosslinking agents, ruaj khov crosslinking qauv tuaj yeem tsim ntawm PVC molecular chains, yog li txhim kho cov cua sov ntawm cov khoom. Piv txwv li, peroxide crosslinking agents decompose ntawm qhov kub thiab txias los tsim cov dawb radicals, ua rau crosslinking cov tshuaj tiv thaiv ntawm PVC molecular chains thiab tsim ib tug peb - qhov ntev network qauv, ho txhim kho thermal stability ntawm PVC.
2. Txhim kho cov khoom siv ntawm PVC
Cov khoom siv hluav taws xob ntawm PVC cov ntaub ntawv yuav tsis ua tau raws li qhov yuav tsum tau ua hauv qee qhov kev thov, xws li xav tau lub zog tensile ntau dua, cuam tshuam lub zog, thiab hnav tsis kam. Powdered crosslinking agents tuaj yeem txhim kho cov khoom siv ntawm PVC cov ntaub ntawv los ntawm kev tsim cov qauv sib txuas ntawm lawv cov saw hlau molecular. Piv txwv li, silane coupling agents tuaj yeem hnov mob nrog cov tshuaj chlorine ntawm PVC molecular chains los tsim Si-O-C bonds, yog li txhim kho cov khoom siv dag zog thiab ua haujlwm ntev ntawm cov khoom.
3. Txhim kho huab cua tsis kam ntawm PVC
Cov ntaub ntawv PVC tau yooj yim cuam tshuam los ntawm ultraviolet hluav taws xob, oxygen, thiab av noo thaum siv sab nraum zoov, ua rau cov khoom laus. Powdered crosslinking agents tuaj yeem txhim kho huab cua tsis kam ntawm PVC cov ntaub ntawv los ntawm kev tsim cov qauv sib txuas ntawm lawv cov saw hlau molecular. Piv txwv li, multi-cov neeg ua haujlwm monomer crosslinking cov neeg ua haujlwm tuaj yeem tsim cov qauv sib txuas ruaj khov ntawm PVC molecular chains, txo cov kev laus ntawm cov ntaub ntawv hauv ib puag ncig sab nraum zoov.
4. Txhim kho kev ua haujlwm ntawm PVC
Cov ntaub ntawv PVC yog cov teeb meem xws li cov dej tsis zoo thiab kev ua haujlwm siab thaum lub sijhawm ua haujlwm. Powdered crosslinking agents tuaj yeem txhim kho kev ua haujlwm ntawm cov ntaub ntawv los ntawm kev tsim cov qauv sib txuas ntawm PVC molecular chains. Piv txwv li, peroxide crosslinking agents tuaj yeem tsim cov dawb radicals los ntawm thermal decomposition thaum lub sij hawm ua PVC, ua rau crosslinking tshua ntawm PVC molecular chains, yog li txhim kho cov khoom fluidity thiab ua kub.
5. Kev txhim kho ntawm cov ntaub ntawv zoo ib puag ncig PVC
Nrog rau kev paub txog kev tiv thaiv ib puag ncig, kev txhim kho ntawm cov ntaub ntawv zoo ib puag ncig PVC tau dhau los ua kev lag luam. Powdered crosslinking agents tuaj yeem txhim kho ib puag ncig kev ua haujlwm ntawm PVC cov ntaub ntawv los ntawm kev tsim cov qauv sib txuas ntawm lawv cov saw hlau molecular. Piv txwv li, silane coupling agents tuaj yeem hnov mob nrog cov tshuaj chlorine ntawm PVC molecular chains kom ruaj khov Si-O-C bonds, yog li txo qhov muaj peev xwm ntawm cov tshuaj phem raug tso tawm thaum siv cov khoom siv.