1. Chitarisiko:
Ongorora nemaziso pasi pechiedza chepanyama chakapararira.
2. Viscosity:
Weresa 400 ml yakakwirira-inokurudzira beaker, tora 294 g yemvura mukati mayo, shandura musanganisi, uye wobva wawedzera 6.0 g yeyero ye cellulose ether;kurudzira nguva dzose kusvikira yanyunguduka zvachose, uye ita 2% mhinduro;Mushure me3-4 h pakuyedza tembiricha (20±2) ℃;shandisa NDJ-1 rotary viscometer kuti uedze, uye sarudza yakakodzera viscometer rotor nhamba uye rotor kumhanya panguva yekuedzwa.Vhura rotor uye uiise mumushonga uye rega imire kwemaminitsi 3-5;batidza switch uye umirire kukosha kuti ugadzikane, uye rekodha mhedzisiro.Cherechedza: (MC 40,000, 60,000, 75,000) Sarudza No. 4 rotor nekukurumidza kwe6 revolutions.
3. Kunyungudika mumvura:
Tarisa maitiro uye nekukurumidza kwekunyungudika panguva yekuigadzirisa kuita 2% mhinduro.
4. Zvemukati zvemadota:
Tora iyo porcelain crucible uye uipise muchoto chebhiza, itonhodze mu desiccator, uye uiyera kusvikira uremu huchichinja.Nyatsoyera (5 ~ 10) magiramu emuenzaniso mune crucible, tanga kugocha crucible pachoto chemagetsi, uye kana yasvika yakakwana carbonization, iise muchoto chebhiza chinofashaira kweinenge (3 ~ 4) h, wozoisa. mune desiccator kuti itonhodze.Weresa kusvika uremu hwakasimba.Kuverenga kwedota (X):
X = (m2-m1) / m0×100
Mune fomula: m1 --huwandu hwemuchinjiro, g;
m2 -- Huwandu hwema crucible nemadota mushure mekupisa, g;
m0 --huwandu hwemuenzaniso, g;
5. Mvura yemukati (kurasikirwa pakuomeswa):
Weresa 5.0g sampuli patireyi yekukurumidza kunyorova analyzer uye gadzirisa kune zero chiratidzo nemazvo.Wedzera tembiricha uye gadzirisa tembiricha kusvika (105±3) ℃.Kana chiyero chekuratidzira chisingafambi, nyora pasi kukosha m1 (kuyera kurongeka ndeye 5mg).
Mvura yemukati (kurasikirwa pakuomesa X (%)) kuverenga:
X = (m1 / 5.0) × 100
Nguva yekutumira: Nov-02-2021