塑料常用測試方法匯總

1、Optical PropertiesHardnessTensile Strength and modulusFlexural strength and ModulusThermal PropertiesFlammabilityIZOD and CHARPY IMPACTMFR and MVRPROPERTIES AND TEST METHODC O N T E N T3/19/20041Haze: Td / Tt*100Td: diffuse Transmittance(2.5)Tt: total light TransmittedTransparency:total light Transm

2、itted/Incident LightGloss:Light reflection on the surface,refractive index of the material, the angle of incident light and the surface topography Color Measurement, Yellow IndexLight is absorbed, reflected and transmitted on the surface of object Optical Properties=3/19/20042Ball indentation hardne

3、ssRockwell hardnessShore A/D The ball indentation hardness is the quotient of the applied load and the surface area of the impression that is present underneath a ball after 30s at a given load.A small load is applied, the apparatus is zeroed, and then a larger load is applied and removed. After a s

4、hort time with the preload still applied, the remaining indentation is read from the scale.The shore hardness is a material parameter for elastomers and plastics and is fixed in the standard DIN 53505 and DIN EN ISO 868 Shore A: softer (90)Shore D: stifferHardness3/19/20043Tensile stress at yield Y

5、MPa Tensile strain at yield Y % Tensile stress at break B MPa Tensile strain at break B %Tensile modulus Et MPa UnitTensile stressForce per unit areaMPA=10.2kgf/cm2=145psi(lbf/in2)TensileStrainChange in length%Tensile Modulus Stress/Strain MPA=10.2kgf/cm2=145psi(lbf/in2)Tensile strength is an abilit

6、y of a material to withstand force that tend to pull it,and to assess uniaxial tensile stress. The elasticity modulus (E modulus) serves as a parameter of comparison for different materials and is a measure of stiffness. Tensile Strength and modulus3/19/20044UnitFlexural stressForce per unit area=3F

7、L/2bh2MPA=10.2kgf/cm2=145psi(lbf/in2)FlexuralStrainChange in length%(3.5%)Flexural modulus of elasticity Stress/Strain =L3F/4wh3dMPA=10.2kgf/cm2=145psi(lbf/in2)Flexural modulus of elasticity Ef MPa Flexural stress on conventional deflection (at 3.5 % outer fiber strain) fc MPa (3.5 % flexural stress

8、) Flexural stress on breakThe ability of the material to withstand bending forces applied perpendicular to its longitudinal axis.The elasticity modulus (E Modulus) serves as a parameter of comparison for different materials and is a measure of stiffness. F is the load (force) at the fracture point L

9、 is the length of the support span b is width h is thickness W is specimen deflection at mid-span Three point loading: tensile, compressive and shear stresses Flexural strength and Modulus3/19/200451)Standard indenter penetrates 1mm into the surface 2)Rates of increase in temperature from 50K/h or 1

10、20 K/h.3)Method A = 10 N load4)Method B = 50 N load1)Heating rate: 120K/hr2)HDT Method A: Flexural stress s = 1.8 N/mm = const.,3)HDT Method B: Flexural stress s = 0.45 N/mm = const.,4)Outer fiber strain of 0.2 % or 0.25mm of deflection is arbitraryHeat distortion temperatureVicat softening temperat

11、ureThermal Properties3/19/20046Burning rate 76mm/min UL 94 VUL 5VUL 94 HBVertical specimen2mm High Tirill burnerFlame application 2*10sCotton waddingBar and Plague Specimen123mm Flame HeightCotton waddingFlame application:5s*5 with 5s intervalhorizontal specimen (thickness 3mm).2mm high Tirill burne

12、rFlame application time 30sT1+T2(T1+T2)*5T2+T3CompleteburnCotton Ignition105030NoNO3025060NONO3025060NOYESV0V2V1T1+T260s60sCottonNoNoWholeYesNO5VB5VAHBFlammability3/19/20047Type of notch:U = unnotchedA = notch with 0.25 mm radiusB = notch with 1.00 mm radiusDirection of impact:e = edgewise f = flatw

13、iseNotch depth:U = unnotchedA = notch with 0.25 mm radiusB = notch with 1.00 mm radiusC = notch with 0.10 mm radiusIzod ISO 180/1ACharpy ISO 179/1eAIZOD and CHARPY IMPACT3/19/20048Melt Mass Flow Rate (MFR) and Melt Volume Rate (MVR)The MVR/MFR is the volume/mass of a polymer melt that is extruded in 10 minutes under the effect of a defined force and temperature through a standard die. 200C,5kg220C,1