Rheometer
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A rheometer is a device that measures the magnitude of friction between the interior of a plastic formulation mixture and the metal surface in contact with it. Essentially, this friction is what we commonly refer to as machinability. Therefore, a rheometer is also a device used to test the processing performance of plastic formulations. From the results of the rheometer test, we obtain a rheological curve; understanding how to interpret this curve is key to using the rheometer correctly. A rheology curve generally has four important torque values: the loading torque, the minimum torque, the maximum torque, and the equilibrium torque, as well as three important time values: the time at which the minimum torque is reached, the time at which the maximum torque is reached, and the time at which the equilibrium torque is attained.
What model of rheometer is the original poster using? Is it the same as what is used for regular rubber testing? We also want to test plastics, but we’re worried that they might be too hard and damage the equipment. Is there also a test for preheating plastic beforehand?
Our rheometer is used to test processing properties. I heard that foreigners use screws with rheological properties to make chocolate; hehe. The ones we use are domestic products, hehe. Bosses aren’t willing to buy expensive foreign products. We use them for testing plastics – we’ve never tested rubber. As far as I know, plastics and rubber behave differently on the rotor. If one really wants to test rubber, it should be possible by setting the appropriate temperature and speed, along with an appropriate feeding rate. The plastic used for testing should preferably be formula material; using pure material directly can really damage the machine. We have already gotten reimbursement for two units for using pure materials: (I hope the boss will be kind enough to provide a Hak or a Labender.) This post was last edited by xykhai on 2009-4-24 at 22:20
I forgot to mention it – our rheology process involves adding powder material; the powder is added and plasticized using a gear chain, with torque and plasticization time being the key factors to consider.
I see, it is indeed a powder material; I just wanted to confirm that. Thank you
The rheometer is a nightmare for me... In college, I helped my professor with experiments involving the grafting of MAH onto PP, and as a result we ended up with something that acted like tear gas... The MAH made people’s eyes and noses stream with tears... :(
I would like to measure the rheology of a pseudoplastic fluid and plot its flow curve. I don’t have a rheometer of my own; could anyone suggest a rheometer that is inexpensive yet effective? Thank you
During use, special attention should be paid to whether there are sudden changes in the curve or any signs of decomposition, right? ? ? . . . .
Hello, I would like to ask whether the rheological properties of slurry can be determined using a rheometer ? ? If chosen, which rheometer is suitable? ? ? ?