Peb feem ntau kawm txog plastics nyob rau hauv cov nqe lus ntawm cov tsos, xim, nro, loj, thiab lwm yam, yog li dab tsi txog plastics los ntawm ib tug tshuaj ntawm view?
Synthetic resin yog cov khoom tseem ceeb ntawm cov yas, thiab nws cov ntsiab lus hauv cov yas yog feem ntau 40% txog 100%.Vim muaj cov ntsiab lus loj thiab cov khoom ntawm cov resins uas feem ntau txiav txim siab cov khoom ntawm plastics, tib neeg feem ntau suav hais tias cov resins yog synonymous nrog plastics.
Yas yog ib qho polymer compound uas yog ua los ntawm monomer ua raw khoom thiab polymerized los ntawm kev ntxiv los yog polycondensation cov tshuaj tiv thaiv.Nws tsis kam mus deformation yog nruab nrab, nruab nrab ntawm fiber ntau thiab roj hmab.Nws yog tsim los ntawm additives xws li cov neeg ua hauj lwm thiab pigments.
Yas txhais thiab muaj pes tsawg leeg: Yas yog tej yam hluavtaws lossis semi-synthetic organic polymer.Hauv lwm lo lus, yas ib txwm muaj cov pa roj carbon thiab hydrogen, txawm tias muaj lwm cov ntsiab lus.Txawm hais tias cov yas tuaj yeem ua los ntawm yuav luag txhua cov organic polymer, feem ntau cov khoom siv yas yog tsim los ntawm cov tshuaj petrochemical.Thermoplastics thiab thermoset polymers yog ob hom yas.Lub npe "yas" yog hais txog plasticity, muaj peev xwm deform tsis tawg.Cov polymers siv los ua cov yas yog yuav luag txhua zaus sib xyaw nrog cov khoom ntxiv, nrog rau cov xim, cov yas, cov stabilizers, muab tub lim, thiab cov tshuaj ntxiv.Cov additives no cuam tshuam rau cov tshuaj muaj pes tsawg leeg, tshuaj lom neeg thiab cov khoom siv ntawm cov yas, nrog rau cov nqi.
Thermosets thiab Thermoplastics: Thermoset polymers, tseem hu ua thermosets, kho rau hauv cov duab mus tas li.Lawv yog amorphous thiab ntseeg tau tias muaj qhov hnyav tsis kawg molecular.Thermoplastics, ntawm qhov tod tes, tuaj yeem ua kom sov thiab rov ua dua.Qee cov thermoplastics yog amorphous, thaum qee qhov muaj cov qauv crystalline ib nrab.Thermoplastics feem ntau muaj qhov hnyav molecular ntawm 20,000 thiab 500,000 AMU.
Post lub sij hawm: Sep-17-2022