Page 70 - Engineering Plastics Handbook

44 Introduction

TABLE 3.5 Typical ASTM Test Methods—Suppliers’ Property Tables
ASTM
D0149(2) Dielectric strength, short term
D0150(2) Dielectric constant, dissipation factor, loss tangent, tan δ
D0256 A Impact strength, Izod
D0495 Arc resistance
D0570 Water absorption
D0638 Tensile strength, tensile modulus, elastic modulus, elongation at break
D0621 Compressive deformation under load
D0648 DTUL
D0695 Compressive strength, rupture at yield, compressive modulus
D0696 Coefficient of thermal expansion (CTE), coefficient of linear thermal
expansion (CLTE)
D0732 Shear strength
D0785 Hardness, Rockwell
D0790 Flexural strength at yield or break, flexural modulus
D0792 Specific gravity, density
D0955 Linear mold shrinkage
D1238 Melt flow rates by extrusion plastometer
D2240 Hardness, Shore
D2583 Hardness, Shore
D3418 T g amorphous

the assets of the Rheological Division of Rheometric Instruments
®
(Piscataway, N.J.) and consolidated Rheometrics into TA Instruments
business in New Castle, Del. Rheometric Instruments changed its name
to Proterion Corporation in 2003, and in 2004 it became part of Wyatt
Technology Corporation (Santa Barbara, Calif.), which manufactures molec-
ular characterization instruments such as light scattering instruments.
TA Instruments dynamic mechanical analyzers are used over a tem-
perature range from −150 to 600°C (−238 to 1112°F) to measure deforma-
tions for shear, tension, compression, three-point bending, and dual/single
cantilever [3]. They include an optical encoder. DMA instrumentation is
more sensitive than differential scanning calorimetry for measuring
smaller transition regions. The company’s DSC instruments measure heat

TABLE 3.6 Other Relevant ASTM and ISO Test Methods
D1505 Test method for density of plastics by density gradient techniques
D3417 Test method for heats of fusion and crystallization of polymers by
differential scanning calorimeter (DSC)
D4000 Classification system for specifying plastic materials
ISO-1133 Plastics—determination of melt mass flow rate (MFR) and melt volume
flow rate (MVR) of thermoplastics
ISO-1628/1 Plastics–guidelines for the standardization methods for determination
of viscosity number and limiting viscosity number of polymers in
dilute solution; Part I: general conditions