ASTM D3835-96

Standard Test Method for Determination of Properties of Polymeric Materials by Means of a Capillary Rheometer

SCOPE
1.1 This test method covers measurement of the rheological properties of polymeric materials at various temperatures and shear rates common to processing equipment. It covers measurement of melt viscosity, sensitivity, or stability of melt viscosity with respect to temperature and polymer dwell time in the rheometer, die swell ratio (polymer memory), and shear sensitivity when extruding under constant rate or stress. The techniques described permit the characterization of materials that exhibit both stable and unstable melt viscosity properties.  
1.2 This test method has been found useful for quality control tests on both reinforced and unreinforced thermoplastics, cure cycles of thermosetting materials, and other polymeric materials having a wide range of melt viscosities.
1.3 The values stated in SI units are to be regarded as standard. The inch-pound units given in parentheses are for information only.  Note 1-There is no similar or equivalent ISO standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Mar-1996
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.30 - Thermal Properties

Relations

• Replaced By: ASTM D3835-02 - Standard Test Method for Determination of Properties of Polymeric Materials by Means of a Capillary Rheometer
• Effective Date: 10-Nov-2002
• Referred By: ASTM F561-19 - Standard Practice for Retrieval and Analysis of Medical Devices, and Associated Tissues and Fluids
• Effective Date: 10-Mar-1996
• Referred By: ASTM D4067-23 - Standard Classification System and Basis for Specification for Reinforced and Filled Poly(Phenylene Sulfide) (PPS) Injection Molding and Extrusion Materials Using ASTM Methods
• Effective Date: 10-Mar-1996
• Referred By: ASTM D5592-94(2018) - Standard Guide for Material Properties Needed in Engineering Design Using Plastics
• Effective Date: 10-Mar-1996
• Referred By: ASTM D8033-22 - Standard Classification System for Poly(Ether Ether Ketone) (PEEK) Molding and Extrusion Materials
• Effective Date: 10-Mar-1996
• Referred By: ASTM F942-18(2023)e1 - Standard Guide for Selection of Test Methods for Interlayer Materials for Aerospace Transparent Enclosures
• Effective Date: 10-Mar-1996
• Referred By: ASTM D3364-99(2019) - Standard Test Method for Flow Rates for Poly(Vinyl Chloride) with Molecular Structural Implications
• Effective Date: 10-Mar-1996
• Referred By: ASTM D5575-18(2023) - Standard Classification System for Copolymers of Vinylidene Fluoride (VDF) with Other Fluorinated Monomers
• Effective Date: 10-Mar-1996
• Referred By: ASTM F451-21 - Standard Specification for Acrylic Bone Cement
• Effective Date: 10-Mar-1996
• Referred By: ASTM D5138-23 - Standard Classification System and Basis for Specification for Liquid Crystal Polymers Molding and Extrusion Materials (LCP)
• Effective Date: 10-Mar-1996
• Referred By: ASTM D3222-21 - Standard Specification for Unmodified Poly(Vinylidene Fluoride) (PVDF) Molding Extrusion and Coating Materials
• Effective Date: 10-Mar-1996
• Referred By: ASTM D8366-21a - Standard Specification for Extruded and Compression Molded Shapes Made from Unfilled Poly(Vinylidene Fluoride) PVDF
• Effective Date: 10-Mar-1996
• Referred By: ASTM D5422-17 - Standard Test Method for Measurement of Properties of Thermoplastic Materials by Screw-Extrusion Capillary Rheometer
• Effective Date: 10-Mar-1996
• Referred By: ASTM D4101-17e1 - Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials
• Effective Date: 10-Mar-1996

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3835 – 96
Standard Test Method for
Determination of Properties of Polymeric Materials by
1
Means of a Capillary Rheometer
This standard is issued under the fixed designation D 3835; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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1. Scope B46.1 Surface Texture
1.1 This test method covers measurement of the rheological
3. Terminology
properties of polymeric materials at various temperatures and
3.1 Definitions of Terms Specific to This Standard:
shear rates common to processing equipment. It covers mea-
3.1.1 apparent values—viscosity, shear rate, and shear
surement of melt viscosity, sensitivity, or stability of melt
stress values calculated assuming Newtonian behavior and that
viscosity with respect to temperature and polymer dwell time
all pressure drops occur within the capillary.
in the rheometer, die swell ratio (polymer memory), and shear
3.1.2 critical shear rate—the shear rate corresponding to
sensitivity when extruding under constant rate or stress. The
the critical shear stress (1/s).
techniques described permit the characterization of materials
3.1.3 critical shear stress—the value of the shear stress at
that exhibit both stable and unstable melt viscosity properties.
which there is a discontinuity in the slope of log shear stress
1.2 This test method has been found useful for quality
versus log shear rate plot or periodic roughness of the polymer
control tests on both reinforced and unreinforced thermoplas-
strand occurs as it exits the rheometer die (MPa).
tics, cure cycles of thermosetting materials, and other poly-
3.1.4 delay time—the time delay between piston stop and
meric materials having a wide range of melt viscosities.
start when multiple data points are acquired from a single
1.3 The values stated in SI units are to be regarded as
charge(s).
standard. The inch-pound units given in parentheses are for
3.1.5 melt density—the density of the material in the molten
information only.
form expressed in g/mL.
NOTE 1—There is no similar or equivalent ISO standard.
3.1.6 melt time—the time interval between the completion
of polymer charge and beginning of piston travel(s).
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.1.7 percent extrudate swell—the percentage change in the
extrudate diameter relative to the die diameter.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.1.8 shear rate—rate of shear strain or velocity gradient in
−1
the melt, usually expressed as reciprocal time such as second
bility of regulatory limitations prior to use.
−1
(s ).
2. Referenced Documents
3.1.9 shear stress—force per area, usually expressed in
2.1 ASTM Standards: pascals (Pa).
D 618 Practice for Conditioning Plastics and Electrical 3.1.10 swell ratio—the ratio of the diameter of the extruded
2
Insulating Materials for Testing strand to the diameter of the capillary (die).
D 1238 Test Method for Flow Rates of Thermoplastics by 3.1.11 viscosity—ratio of shear stress to shear rate at a given
2
Extrusion Plastometer shear rate or shear stress. It is usually expressed in pascal
E 691 Practice for Conducting an Interlaboratory Study to seconds (Pa·s).
3
Determine the Precision of a Test Method 3.1.11.1 Viscosity determined on molten polymers is some-
2.2 ANSI Standard: times referred to as melt viscosity.
3.1.11.2 Viscosity determined on materials exhibiting non-
Newtonian flow behavior is referred to as apparent viscosity
1
This test method is under the jurisdiction of ASTM Committee D-20 on Plastics
unless corrections are made as specified in Section 11.
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties
(Section D20.30.08).
3.1.12 zero shear viscosity, h —the limiting viscosity as the
0
Current edition approved March 10, 1996. Published May 1996. Originally
published as D 3835 – 79. Last previous edition D 3835 – 95a.
2 4
Annual Book of ASTM Standards, Vol 08.01. Available from American National Standards Institute, 11 W. 42nd St., 13th
3
Annual Book of ASTM Standards, Vol 14.02. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 3835
shear rate falls to zero. (B) For a constant-rate rheometer:
dP
...