(新)橡胶毛细管流变仪应用
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* Mail address:Dr. K.-H. Moos, Göttfert Werkstoffprüfmaschinen GmbH, Postfach 1261,Siemensstraße 2, 6967Buchen/Odw., West Germanv
K.-H. Moபைடு நூலகம்s*
Göttfert WerkstoffprüfmaschinenGmbH. Buchen. West Germany
For Fast and Easy TestingProcessibility 0/ Rubber Compounds
In practical rubber processing the compounds will be subjected to high shear rates. Hence in order to optimize processingconditions and also to guarantee a constant quality of the compounds it's a mus! to lest processibility of rubber compoundsin the shear rate range of practical processing. Processibility of rubber compounds is predominantly determined by its viscosity that's balanced by two effects; viscosity of these materials decreasesdrastically with increasing shear rate (pseudoplasticity) hut increasesmarkedly with the onset and developmentof curing. The rheovulkameter has been developpedespeciallyto take care of these effects and allowing to measure easily and fast processibility of rubber compoundsunder conditions of practical processing.It can be used like a capillary rheometerhut like an injection molding tester as weil. Rheovulkameter testsgiven information about both: j/owing (Rheo-) and curing (Vulkameter) of rubber compoundsand other curing systems,tao.
1 Introduction Whereasin former times elastomercompoundshave been processed by quite slow processes like compression molding für instance, they are nowadaysprocessed predominantlyby fast processes like extrusion and injection molding. In the course of these processes compoundswill be treated with high shear deformationsand high shear rates. For rubber compoundsare pseudoplastic, these processes bring along strongrequirements to uniformity of the compounds- especially in regard of processibility - to operate processing equipmentweIl and to guarantee a constantproduct quality. Processibility of rubbercompoundsis usuallydiscribedin termsof it's viscosity.The classical methodethat is still orten usedto determineprocessibilityis to measure so calledMooney-viscosity with a Mooney Plastometer [1].Also the results of curemeters - rotorless[2, 3] or with a rotor [4] - that are standardised in rubber testing are sometimes usedto get an information about processibility.However thesetest proceduceshave the big disadvantage, that testswill be made at shearratesof about 1 to 2 S-1 that are weIl below the shear rates of practical rubber processingwith proceduresmentioned above[5]. An advantage is brought along In this regard with high pressure capillary rheometers; für theseinstrumentsallow to measure viscosities in the whole shearrate rangeof practical
K.-H. Moபைடு நூலகம்s*
Göttfert WerkstoffprüfmaschinenGmbH. Buchen. West Germany
For Fast and Easy TestingProcessibility 0/ Rubber Compounds
In practical rubber processing the compounds will be subjected to high shear rates. Hence in order to optimize processingconditions and also to guarantee a constant quality of the compounds it's a mus! to lest processibility of rubber compoundsin the shear rate range of practical processing. Processibility of rubber compounds is predominantly determined by its viscosity that's balanced by two effects; viscosity of these materials decreasesdrastically with increasing shear rate (pseudoplasticity) hut increasesmarkedly with the onset and developmentof curing. The rheovulkameter has been developpedespeciallyto take care of these effects and allowing to measure easily and fast processibility of rubber compoundsunder conditions of practical processing.It can be used like a capillary rheometerhut like an injection molding tester as weil. Rheovulkameter testsgiven information about both: j/owing (Rheo-) and curing (Vulkameter) of rubber compoundsand other curing systems,tao.
1 Introduction Whereasin former times elastomercompoundshave been processed by quite slow processes like compression molding für instance, they are nowadaysprocessed predominantlyby fast processes like extrusion and injection molding. In the course of these processes compoundswill be treated with high shear deformationsand high shear rates. For rubber compoundsare pseudoplastic, these processes bring along strongrequirements to uniformity of the compounds- especially in regard of processibility - to operate processing equipmentweIl and to guarantee a constantproduct quality. Processibility of rubbercompoundsis usuallydiscribedin termsof it's viscosity.The classical methodethat is still orten usedto determineprocessibilityis to measure so calledMooney-viscosity with a Mooney Plastometer [1].Also the results of curemeters - rotorless[2, 3] or with a rotor [4] - that are standardised in rubber testing are sometimes usedto get an information about processibility.However thesetest proceduceshave the big disadvantage, that testswill be made at shearratesof about 1 to 2 S-1 that are weIl below the shear rates of practical rubber processingwith proceduresmentioned above[5]. An advantage is brought along In this regard with high pressure capillary rheometers; für theseinstrumentsallow to measure viscosities in the whole shearrate rangeof practical
