If you are in this field, then you will know that viscosity is the most property of HPMC, and sometimes we will distinguish different types just by the viscosity, such as HPMC-200, usually, it means the viscosity is 200,000 cps, and also the higher viscosity of HPMC means the higher water retention, and now let me show you how to test it.
1). The equipment we need:
- NDJ-4 viscometer
2. 0.0001 g analytical balance
3. 0.01 g analytical balance
4. digital overhead stirrer
5. thermostatic drier
2). Testing steps:
- weigh out more than 10 g of HPMC
2. dry the sample
3. weigh out 8.0000 g HPMC
4. get 392.00 g hot water in the beaker
5. test the temperature of the hot water
6. put the sample into the hot water and stir it.
7. make sure the cold bath is under 10 degrees
8. put the solution in the cold bath and stir
9. heat the solution up to 20 degrees
10. test the temperature of the solution
11. test the viscosity by NDJ-4 viscometer
12. read the readings on the turntable
All right, this is how we test the viscosity by NDJ-4 viscometer, and it’s 200,000 cps, hope this would help you. And if you need high viscosity HPMC, please just feel free to contact us.
