Lawv yog cov yas tawv thiab ib zaug ua kom sov tsis tuaj yeem rov ua dua.
Yuav ua li cas cov yas tuaj yeem rov ua dua?
Qhov sib txawv ntawm kev rov ua dua tshiab ntawm cov khoom yas tuaj yeem ua raws li lawv ua; Cov thermoset yas muaj cov polymers uas tsim cov tshuaj tiv thaiv tsis tuaj yeem rov ua dua thiab tsis tuaj yeem rov ua dua, qhovthermoplastics tuaj yeem rov ua dua thiab rov ua dua.
Peb puas tuaj yeem siv Bakelite?
Cov Lus Qhia: Bakelite yog 3-dimensional cross-linked network structured thermosetting polymer uas nyuaj rau rov ua dua tom qab siv. Txawm li cas los xij, nws muaj cov pa roj carbon ntau thiab CaCO3 uas tuaj yeem rov qab los siv los ua cov khoom siv hluav taws xob thiab cov tshuaj fluxing hauv kev ua hlau.
Puas Bakelite tau tawv los kho?
Tom qab ntawd, Bakelite, uas yog ib qho ntawm cov yas nkig, ua los ntawm formaldehyde thiab phenol. … Baekeland tsim cov yas los ntawm kev sib txuas phenolic resin, formaldehyde, thiab cua sov. Nws yog ib qho polymer uas dhau los ua irreversibly hardened thaum kho.
Vim li cas Bakelite tsis tuaj yeem rov ua dua piav qhia luv luv?
Thermosetting yas, zoo li Bakelite lossis polyurethane, txawv vim tias lawv tawv thaum koj sov lawv. Thaum lawv tau teeb tsa, koj tsis tuaj yeem yaj lawv. Qhov no ua rau cov thermosetting plastics yuav luag tsis tuaj yeem rov ua dua.
