標準號：CYS 145 Pt.6 Method 601-1984
中文標準名稱：塞浦路斯塑料測試標準方法．第6部分：流變性方法第601條：熱塑性塑料熔體流動速度測定
英文標準名稱：CYPRUS STANDARD METHOD OF TESTING PLASTICS Part 6: Rheological Properties METHOD 601: DETERMINATION OF MELT PLOW RATE OF THERMOPLASTICS
發布日期：1984/1/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This Cyprus Standard specifies a method for the determination of the melt flow rate of molten thermoplastic materials under specified conditions of temperature and pressure. When the test conditions are specified ina material specification, this method may be used, to characterize the melt flow rate of the material.NOTE - Test conditions commonly used are listed in the annex.1.2 The melt flow rate of high polymers is dependent on the rate of shear. The rates of shear in this test are much smaller than those used under normal conditions of fabrication, and therefore data obtained by this method for various thermoplastics nay not always correlate with their behaviour in actual use.The Method is useful in Quality Control.1.3 VJhen the method is used with certain materials, consideration shouldbe given to the factors leading to the loss of reproducibility. Such factors includea) thermal degradation or crosslinking of the material, causing the melt flow rate to change during preheating or the period of test; powdered materials requiring long preheating times are sensitive to this effect. In certain cases the inclusion of stabilizers is necessary to reduce the variability;b) filled or reinforced materials, where the distribution or orientation of the filler may affect the melt flow rate