1 Scope
This part of GB/T 2546 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of polypropylene (PP) moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given in this part.
This part specifies the methods and conditions for preparation of test specimens and determination of properties. Properties and test methods which are suitable and necessary to characterize PP moulding and extrusion materials are listed.
The properties have been selected from the general test methods in ISO 10350-1. Other test methods in wide use for or of particular significance to these moulding and extrusion materials are also included in this part, as are the designatory properties specified in Part 1.
In order to obtain reproducible and comparable test results, it is necessary to use the methods of preparation and conditioning, the specimen dimensions and the test procedures specified in this part. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 2546. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 1409-1988 Methods for the Determination of the Permittivity and Dielectric Dissipation Factor of Solid Electrical Insulating Materials at Power, Audio and Radio Frequencies Including Metre Wavelengths [eqv IEC 60250:1969 ]
GB/T 1410-1989 Methods of Test for Volume Resistivity and Surface Resistivity of Solid Electrical Insulating Materials (eqv IEC 60093:1980)
GB/T 1634.1 Plastics — Determination of Temperature of Deflection under Load — Part 1: General Test Method
Foreword II
1 Scope
2 Normative References
3 Preparation of Test Specimens
4 Conditioning of Test Specimens
5 Determination of Properties
Annex A (Informative) Comparison of Normative References in This Part with Quoted Standards in ISO 1873-2:1997
