Determination of relative viscosity by vibration method

Many researchers have proposed to measure the viscosity of some materials by silver motion method at high temperature, such as measuring the viscosity of molten metal, glass, slag and rock, etc., but this method is not widely used.

C.B_Yakubovich and EH Koquekovskaya first proposed to use the vibration method to measure the viscosity of oil rattan materials; this method is very convenient and accurate for the determination of relative viscosity. (Related instruments : viscometer)

Gurevich used this method more than once in his research work. According to this method, the viscosity is determined by the reduction of the vibration of the female body submerged in the test solution. It is difficult to control the dimension The viscosity of the structural cable is calculated according to the logarithmic subtraction rate of the vibration cessation of the difficult body.

Calculation of relative viscosities by this method is complex and can only be calculated after allowing for a series of simplifications that produce inaccurate results, so this vibratory method is only useful for determining relative viscosities.

The method of CB Yakuboweier and EH Koccokov New Kanu is suitable for measuring the relative viscosity of all varnishes and polymer oils. The measurement of this method requires 1-3 ml of sample, and the accuracy of the measurement depends on the work. The whisker volume is 3 to 4 minutes; the measurement also takes the same long time. Therefore, according to the amount of materials required and the test time, this method is the most suitable for inspection tests. State 53) There is an ordinary pendulum 1 for measuring film hardness (bought in Shenlan 241), on which another pendulum clock 2 with a long millimeter is fixed; a cone 3 is fixed at one end of the second pendulum clock, and the size is Pour 3 ml of test solution into a 10x12 mm container 5 and place the container in a thermostat (Water Bath) 6. (Related instruments: constant temperature Water Tank)

Pour water into the test solution container up to the mark (3ml), align the connecting tip at 0° on the scale below, then turn the connecting needle to 5°, well and gently, without making it vibrate Loosen it, and start the stopwatch at the same time. After the pendulum hand moves freely for 5 minutes, pay attention to the scale reached by the pendulum tip at the end of five minutes.

Then, wipe the container and the needle level, pour the test solution into the container and measure the vibration weaving time required for the needle to reach its electric value of 11 degrees (in water) after 5 minutes of vibration. The viscosity of the test solution can be used The following formula is calculated: