Roj Hmab, ib qho khoom siv tseem ceeb hauv kev lag luam niaj hnub no, feem ntau tau faib ua ob hom: roj hmab ntuj thiab hluavtaws roj hmab. Ob qhov kev hloov pauv no ua haujlwm rau ntau yam kev siv, los ntawm tsheb log tsheb mus rau cov khoom siv kho mob, vim lawv cov khoom tshwj xeeb. Kev nkag siab txog qhov sib txawv ntawm cov roj hmab ntuj thiab hluavtaws yog qhov tseem ceeb rau kev xaiv cov khoom tsim nyog rau kev siv tshwj xeeb.
Qhov sawv ntawm Cov roj hmab hluavtaws tau hloov pauv kev lag luam los ntawm kev muab lwm txoj hauv kev rau cov roj hmab ntuj, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej uas ntuj roj hmab txwv, xws li susceptibility rau aging thiab ib puag ncig tej yam kev mob, tshwm sim. Kab lus no qhia txog qhov sib txawv ntawm ob hom roj hmab no, tshawb txog lawv lub hauv paus chiv keeb, khoom, kev siv, thiab kev cuam tshuam ib puag ncig.
Ntuj Roj Hmab: Keeb Kwm thiab Cov Khoom
Keeb kwm ntawm Natural Rubber
Cov roj hmab ntuj yog muab los ntawm cov latex ntawm cov ntoo roj hmab, feem ntau Hevea brasiliensis. Cov latex no yog cov kua mis uas muaj cov txheej txheem ntau, suav nrog coagulation thiab ziab, los tsim cov roj hmab nyoos. Kev cog qoob loo ntawm cov ntoo roj hmab yog tsom rau thaj chaw sov, nrog rau cov tebchaws xws li Thaib, Indonesia, thiab Malaysia yog cov neeg tsim khoom loj tshaj plaws.
Cov khoom ntawm Natural Rubber
Cov roj hmab ntuj muaj npe nrov rau nws cov elasticity zoo heev, siab tensile lub zog, thiab tsis kam hnav thiab tsim kua muag. Nws kuj nthuav tawm cov hluav taws xob rwb thaiv tsev zoo thiab ua tau zoo nyob rau hauv qhov chaw qis qis. Txawm li cas los xij, nws muaj kev txwv, xws li tsis zoo rau cov cua sov, lub teeb, thiab ozone, uas tuaj yeem ua rau degradation dhau sijhawm.
Synthetic Roj Hmab: Kev Tsim Kho Niaj Hnub No
Kev tsim kho ntawm Synthetic Rubber
Cov roj hmab hluavtaws tau tsim los ua cov lus teb rau cov kev txwv ntawm cov roj hmab ntuj thiab xav tau cov khoom siv ntau yam. Thawj cov roj hmab hluavtaws, hu ua Buna, tau tsim nyob rau hauv thaum ntxov xyoo pua 20th. Txij thaum ntawd los, kev nce qib hauv polymer chemistry tau ua rau kev txhim kho ntau hom roj hmab hluavtaws, suav nrog styrene-butadiene roj hmab (SBR), nitrile roj hmab (NBR), thiab ethylene-propylene-diene monomer (EPDM).
Khoom ntawm Synthetic Rubber
Cov roj hmab hluavtaws muaj ntau yam zoo dua li cov roj hmab ntuj, xws li txhim kho kev tiv thaiv tshav kub, tshuaj, thiab kev laus. Nws tuaj yeem hloov kho kom tau raws li cov kev xav tau tshwj xeeb los ntawm kev hloov kho nws cov tshuaj muaj pes tsawg leeg. Piv txwv li, EPDM tiv taus huab cua thiab ozone, ua rau nws zoo tagnrho rau kev siv sab nraum zoov, thaum NBR paub txog nws cov roj zoo heev.
Kev Ntsuam Xyuas Sib Piv: Ntuj vs. Synthetic Rubber
Kev tsim cov roj hmab ntuj muaj qhov tseem ceeb ntawm ib puag ncig kev hneev taw vim yog kev ua hav zoov thiab siv cov tshuaj hauv cov cog roj hmab. Cov roj hmab hluavtaws, thaum txo qis kev vam khom ntawm cov peev txheej ntuj, yog muab los ntawm cov khoom siv roj av, ua rau muaj kev txhawj xeeb txog cov pa roj carbon emissions thiab tsis biodegradability. Cov kev siv zog tau tsim los tsim cov kev hloov pauv ruaj khov, xws li bio-based hluavtaws roj hmab.
Xaus
Hauv kev xaus, kev xaiv ntawm ntuj thiab hluavtaws roj hmab yog nyob ntawm cov kev cai tshwj xeeb ntawm daim ntawv thov. Thaum cov roj hmab ntuj excels elasticity thiab tensile lub zog, hluavtaws roj hmab muaj superior tsis kam rau ib puag ncig yam thiab tshuaj. Kev nce qib tsis tu ncua hauv cov cuab yeej siv roj hmab txuas ntxiv nthuav dav rau ob hom roj hmab, kom ntseeg tau tias lawv muaj feem cuam tshuam rau ntau yam kev lag luam.
Rau cov neeg nyiam tshawb nrhiav ntau hom roj hmab hluavtaws thiab lawv cov ntawv thov, mus saib hluavtaws roj hmab rau cov ncauj lus kom ntxaws.
