Pendulum friction device test

Pendulum Friction Device Test. See under Friction Sensitivity Tests... 

H. Kast (104-07) Determination of Sensitivity to Friction (Medicion de la sensibili-dad al rozamiento) (107) Determination of Sensitivity to Initiation by Detonation (110-12) Determination of Sensitivity to Initiation by Influence (112-13) Determination of Power of Explosives using Trauzl Test (113-17), Small Lead Block Test (117), Quinan Apparatus (118), Guttmann Apparatus (118-19), Ballistic Pendulum (119-20), Mortar (Mortero probeta) (120-21) Determination of Efficiency of Initiating Devices by Lead Plate Test (121-23), Nail Test (123), Sand Test (124) and Acoustic Tests (124) Determination of Characteristics of Flames Produced on Explosion (125-29)... 

A torsion pendulum is a particular useful device for examining the modulus and internal friction of polymers. When the sample geometry is in the form of a cone-and-plate or concentric cylinders, the pendulum can be used for very weak gels, which are hard to characterize in conventional testing machines. Commercial models are available which give a complete record of amplitude versus time. However, even mannal estimation of the frequency of oscillation and the number of cycles to decrease the amplitude by some factor can be quite useful. 

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