Rau qee qhov, zinc stearate tuaj yeem hloov pauv stearic acid thiab zinc oxide, tab sis stearic acid thiab zinc oxide hauv roj hmab tsis tuaj yeem hnov qab thiab muaj lawv tus kheej cov teebmeem.
Zinc oxide thiab stearic acid tsim ib qho kev ua kom muaj zog nyob rau hauv sulfur vulcanization system, thiab nws lub luag haujlwm tseem ceeb yog raws li hauv qab no:
1. Activation vulcanization system:
ZnO reacts nrog SA los tsim zinc xab npum, uas txhim kho cov solubility ntawm ZnO hauv roj hmab, thiab cuam tshuam nrog cov accelerators los ua ib qho nyuaj nrog zoo solubility hauv roj hmab, activates accelerators thiab sulfur, thiab txhim kho vulcanization efficiency.
2. Ua kom qhov sib txuas sib txuas ntawm cov vulcanizates:
ZnO thiab SA tsim cov zinc soluble ntsev.Zinc ntsev yog chelated nrog cov ntoo khaub lig-txuas daim ntawv cog lus, uas tiv thaiv qhov tsis muaj zog daim ntawv cog lus, ua rau lub vulcanization tsim ib tug luv luv cross-linked daim ntawv cog lus, ntxiv tshiab cross-linked bonds, thiab tsub kom cov cross-linking ceev.
3. Txhim kho qhov kev laus ntawm cov roj hmab vulcanized:
Thaum lub sij hawm siv cov roj hmab vulcanized, cov polysulfide daim ntawv cog lus so thiab cov generated hydrogen sulfide yuav ua rau kom cov roj hmab aging, tab sis ZnO reacts nrog hydrogen sulfide los tsim zinc sulfide, uas siv hydrogen sulfide thiab txo cov catalytic decomposition ntawm hydrogen sulfide ntawm tus ntoo khaub lig. - txuas network;Tsis tas li ntawd, ZnO tuaj yeem xaws cov kab hluav taws xob tawg thiab ua kom ruaj khov sib txuas sib txuas.
4. Txawv kev xav mechanisms:
Hauv kev sib txawv vulcanization kev sib koom ua ke, cov txheej txheem ntawm kev ua ntawm cov vulcanization accelerators sib txawv heev.Cov nyhuv ntawm ZnO thiab SA cov tshuaj tiv thaiv los tsim cov zinc stearate nruab nrab kuj txawv ntawm kev siv zinc stearate ib leeg.
Post lub sij hawm: Oct-12-2021