000			01416nam a2200145Ia 4500
008			220216s9999 xx 000 0 und d
100			_aNoparatanakailas V
245		0	_aHollow cylinder sample test using a dynamic mechanical analyser
260			_bJournal of Rubber Research _c2000
300			_a95-103
520			_aA hollow cylinder specimen was designed for testing rubber in shear deformation using a Dynamic Mechanical Analyser series 7. Test results showed that a lower coefficient of variation for storage modulus is obtained with this system than using a compressive pellet sample ia a cup-and-plate deformation. This shear test has been developed to characterise four grades of natural rubber: Standard Thai Rubber (STR) 5 L; STR 20; RSS and skim block. Over a frequency range of 0.1Hz to 50.0Hz and 0.5;strain, the effect of rubber grade, temperature, degree of mastication and the amount of carbon black (N330) was investigated. Dynamic complex and real viscocities were determined and showed good agreement with the shear flow viscosity obtained from experiments with a Rosand capillary rheometer. However, limitations of this shear technique were found, such as a failure of test specimen at temperatures approaching the molten state of rubber, and insufficient force control for very stiff specimens with high carbon black loading.
650			_aHollow cylinder
700			_aSeadan M
942			_cJS
999			_c60471 _d60471