Cov txheej txheem:
Video: Yuav ua li cas yaj PVA hmoov hauv dej?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Yuav ua li cas yaj PVA
- Sov dej . Sov dej yuav txo qhov yaj sij hawm
- Sib tov. Siv nplawm / khiav dej kom txo cov yaj sij hawm
- Pliers. Koj tseem tuaj yeem ua kom nrawm PVA kev daws teeb meem los ntawm tso cov ntawv luam tawm rau hauv dej kwv yees li 10 feeb, tom qab ntawd tshem tawm feem ntau ntawm cov kev txhawb nqa nrog pliers.
Ua li no, PVA kua nplaum puas yaj hauv dej?
PVA kua nplaum yog dej soluble thiab ntxuav upeasily nrog dej . Nws yog tus qauv dawb kua nplaum ntawm cov tsev kawm ntawv feem ntau.
Kuj Paub, vim li cas polyvinyl cawv yog yaj hauv dej? Poly (yas cawv ) ( PVA ) yog a dej tsis haum polymer nws dej solubility nyob ntawm nws qib ntawm hydrolysis, qhov hnyav molecular, thiab nyiam hydrogenbond hauv cov kua dej. PVA nthuav tawm ob qho tib si sab saud thiab qis dua solubility kub thiab tuaj yeem solubilized hauv dej.
Ib yam li ntawd, koj npaj PVA li cas?
Qhov hnyav txog 40 grams polyvinyl cawv rau hauv 1-Lborosilicate iav beaker. Sau lub beaker rau 1-L cim nrog dej kub; do. Npog nrog microwaveable yas qhwv. Microwaveon siab li 3 feeb; do thiab cua sov rau ntxiv 3 feeb.
Yuav ua li cas ntxuav PVA kua nplaum?
Yuav Ua Li Cas Tshem PVA
- Thov ib txheej txheej dawb ntawm cov ntsuj plig dawb rau saum npoo kom huv los siv daim ntaub huv.
- Siv daim ntaub thib ob thiab tsau nws hauv dej sov, xab npum.
- Rov ua cov kauj ruam kom tshem tag nrho cov PVAc qhuav.
- Tshem tawm tawv PVAc residue nrog lub qub, tseem-ntse razorblade.
- Siv lub tshuab nqus tsev vacuum yog tias koj tseem tsis tuaj yeem tshem PVAc.
Pom zoo:
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Yuav ua li cas yaj PVA kua nplaum?
Yuav Ua Li Cas Tshem PVA Siv ib txheej nyias ntawm cov dab dawb rau saum npoo kom huv si siv daim ntaub huv. Siv daim ntaub thib ob thiab tsau nws hauv dej sov, xab npum. Rov ua cov kauj ruam kom tshem tag nrho cov PVAc qhuav. Tshem tawm tawv PVAc residue nrog lub qub, tseem-ntse rab chais hniav. Siv lub tshuab nqus tsev vacuum yog tias koj tseem tsis tuaj yeem tshem PVAc
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