Ntau qhov cuam tshuam ntawm carbon dub ntawm cov khoom siv roj hmab
May 14, 2022
Qhov ntau dua cov tshuaj lom neeg ntawm cov pa roj carbon dub yog, cov roj hmab ntau dua yog tsim los ntawm kev sib xyaw, uas ua rau lub Mooney viscosity ntawm cov roj hmab sib xyaw ua ke, ua rau kom tuag expansion tus nqi thiab ib nrab tiav cov khoom shrinkage tus nqi thaum lub sij hawm extrusion, thiab slows down lub extrusion ceev. . Lub zog tensile, lub zog tsim kua muag thiab hnav tsis kam ntawm vulcanized roj hmab yog siab dua.
Kev sib raug zoo ntawm qhov me me ntawm cov pa roj carbon dub thiab cov khoom siv roj hmab
Txij li thaum cov ntsiab lus nquag ntawm cov pa roj carbon dub muaj nyob rau ntawm cov pa roj carbon dub, qhov me dua cov pa roj carbon dub, qhov loj ntawm qhov chaw tshwj xeeb, thiab cov ntsiab lus tseem ceeb ntawm carbon dub ntawm tib yam zoo, uas tuaj yeem ua kom cov pa roj carbon zoo dua. dub ntawm roj hmab. Chemical bonding thiab lub cev adsorption, yog li txhim kho cov nyhuv reinforcing. Yog li ntawd, qhov luaj li cas ntawm cov pa roj carbon dub yog qhov thib ob uas cuam tshuam rau cov khoom txhawb zog ntawm cov pa roj carbon dub, uas yog, qhov dav.
Qhov me me ntawm cov pa roj carbon dub, qhov siab dua lub zog tensile, lub zog tsim kua muag, tensile kev nyuaj siab, hnav tsis kam thiab hardness ntawm vulcanizate, qhov zoo dua qhov flexural crack resistance, thiab txo qhov resilience thiab elongation ntawm tawg. . Txawm li cas los xij, yog tias qhov loj me me dhau lawm, lub zog cohesive ntawm cov khoom yuav loj, thiab nws yuav yooj yim rau agglomerate, uas yuav ua rau nyuaj rau dispersion thaum kneading, thiab yuav txo tau cov plasticity thiab extrusion kev ua tau zoo.
Kev sib raug zoo ntawm cov qauv carbon dub thiab cov khoom siv roj hmab
Cov qauv ntawm cov pa roj carbon dub yog qhov thib peb uas cuam tshuam rau lub zog txhawb zog ntawm carbon dub, uas yog, qhov zoo tshaj plaws. Qhov no yog vim cov pa roj carbon dub nrog cov qauv siab muaj cov txheej txheem polymelt morphology, ntau ceg, thiab cov voids loj. Thaum sib xyaw nrog roj hmab, ntau cov roj hmab occluded (lossis cov roj hmab suav nrog) yog tsim. Txij li thaum cov pa roj carbon dub polymer yaj tuaj yeem cuam tshuam qhov deformation ntawm absorbed roj hmab molecular saw, nws muaj kev cuam tshuam tseem ceeb ntawm kev txhim kho ntawm vulcanizate lub tensile kev nyuaj siab, hardness thiab lwm yam khoom, yog li xav txog lub zog muaj nuj nqi. Nyob rau tib lub sijhawm, kev tsim cov roj hmab occluded kuj plays lub luag haujlwm tseem ceeb hauv kev txhim kho cov dispersibility ntawm carbon dub thaum sib tov thiab txhim kho cov extruding kev ua tau zoo. loj thiab du.
