Vim li cas PVCTsiajXav tau thaum tshav kub kub stabilizers?
PVC yog ib lub ntiaj teb cov khoom lag luam loj tshaj plaws. Nws yog cov khoom siv dawb dawb nrog cov qib qis ntawm cov ceg thiab lub teeb tsis zoo thiab ua kom sov. Txij li tau PVC muaj qhov ua tau zoo heev, cov txheej txheem melting yog qhov siab li 160 degree, (1 resin yuav tsum tau ua thiab tsim los ntawm ib txoj kev ntawm cov yas meltization los ntawm kev hloov kho.
Lub luag haujlwm ntawm cov cua sov stabilizer:
1, tiv thaiv lossis inhibit lub dehydrohlorination thiab discoloration tshwm sim los ntawm lub cev qhuav sij hawm thaum lub sijhawm ua haujlwm.
2, thaum lub sijhawm siv tau siv lub sijhawm ntawm cov khoom lag luam, tswj hwm nws qhov kev ruaj khov txaus thiab ua kom sov los ntawm tshav kub, lub teeb, thiab txuas ntxiv nws txoj kev pabcuam lub neej.
Mechanism ntawm kev ua ntawm cov cua sov stabilizer:
01 nqus hcL tsim thaum lub sijhawm PVC;
02 Hloov cov chlorine atoms los yog cov tshuaj pleev pob txha atr) chlorine atoms hauv PVC molecules kom inhibit tshem tawm ntawm PVC thiab HCL;
03 rov qab nrog dawb radicals los txiav tawm hloov ntawm dawb radicals;
04 hnov mob nrog conjugated ob daim ntawv cog lus kom txo tau xim;
05 inhibit cov oxidation ntawm PVC;
06 passivate hlau ions uas catection ntawm kev tshem tawm HCL.
Kev faib tawm cov pa hluav taws kub:
Raws li txoj haujlwm lawv ua si, lawv tuaj yeem muab faib ua peb pawg:
1. Lub ntsiab cua sov stabilizers (cov ntsev ua txhuas, cov ntaub ntawv hlau, cov organic tin, thiab lwm yam)
2. Ntu Cua Sov Stabilizers (EPOXides, Phosphites, Polyols, thiab lwm yam)
3. Composite Cobilizers muaj lub ntsiab thiab theem nrab stabilizers
