1. Ponahalo:
Hlahloba ka pono tlas'a khanya ea tlhaho e hasaneng.
2. Viscosity:
Beha 400 ml ea beaker e matla, e boima ba 294 g ea metsi ho eona, bulela mixer, ebe u eketsa 6.0 g ea ether ea cellulose e lekantsoeng;hlohlelletsa ka ho tsoelang pele ho fihlela e qhibiliha ka ho feletseng, 'me u etse tharollo ea 2%;Ka mor'a 3-4 h mocheso oa liteko (20±2)℃;sebelisa NDJ-1 rotary viscometer ho hlahloba, 'me u khethe nomoro ea rotor ea viscometer e nepahetseng le lebelo la rotor nakong ea tlhahlobo.Bulela rotor 'me ue kenye ka tharollo' me ue tlohele hore e eme metsotso e 3-5;bulela sesebelisoa ebe u emela hore boleng bo tsitsitse, 'me u tlalehe sephetho.Tlhokomeliso: (MC 40,000, 60,000, 75,000) Khetha rotor ea 4 ka lebelo la 6 revolutions.
3. Boemo ba ho qhibiliha metsing:
Ela hloko ts'ebetso le lebelo la ho qhibiliha nakong ea ts'ebetso ea ho e hlophisa hore e be tharollo ea 2%.
4. Likahare tsa molora:
Nka porcelain crucible 'me ue chese ka sebōpi se belang sa pere, se pholile ka desiccator,' me u se lekanye ho fihlela boima bo fetoha kamehla.Lekanya ka nepo (5 ~ 10) ligrama tsa sampole ka har'a crucible, qala ka ho chesa crucible ka sebōping sa motlakase, 'me ka mor'a hore e fihle ho carbonization e feletseng, e kenye ka sebōping se belang sa pere nako e ka bang (3~4) h, ebe ue beha. ka setlolong ho se phodisa.Boima ho fihlela boima bo sa feleng.Palo ea molora (X):
X = (m2-m1) / m0×100
Ka mokhoa: m1 --boima ba crucible, g;
m2 ——Kakaretso ea boima ba crucible le molora ka mor’a ho chesoa, g;
m0 ——boima ba sampole, g;
5. Likahare tsa metsi (tahlehelo nakong ea ho omisoa):
Beha sampole ea 5.0g holim'a terei ea mohlahlobi o potlakileng oa mongobo 'me u e lokisetse letšoao la zero ka nepo.Eketsa mocheso 'me u fetole mocheso ho (105±3)℃.Ha sekala sa pontšo se sa tsamaee, ngola boleng ba m1 (ho nepahala ha boima ke 5mg).
Palo ea litaba tsa metsi (tahlehelo ha ho omisoa X (%)):
X = (m1 / 5.0) × 100
Nako ea poso: Nov-02-2021