GB/T 34691.2-2017Plastics -- Thermoplastic polyester (TP) moulding and extrusion materials -- Part 2: Preparation of test specimens and determination of properties (English PDF)

1 Scope

This Part of GB/T34691 specifies the methods and conditions for the preparation of test specimens and the determination of properties of thermoplastic polyester (TP) molding and extrusion materials. This part also specifies the requirements for the pretreatment of test materials and the conditioning of test specimens before testing.

This Part lists the appropriate and necessary properties and test methods for characterizing thermoplastic polyester (TP) molding and extrusion materials. These properties are selected from the general test methods in GB/T 19467.1-2004. This Part also lists other test methods that are widely used or have special significance for molding and extrusion materials.

In order to ensure the reproducibility and repeatability of the test results, the methods of specimen preparation and state adjustment, as well as the specified specimen size and test method specified in this part may be used. The test data obtained using specimens prepared under different conditions or using specimens of different sizes may be inconsistent.

This standard applies to homopolymer and copolymer thermoplastic polyesters.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 1033.1-2008, Plastics -- Methods for determining the density of non-cellular plastics -- Part 1: Immersion method, liquid pycnometer method and titration method (ISO 1183-1:2004, IDT)

GB/T 1033.2-2010, Plastics -- Methods for determining the density of non-cellular plastics -- Part 2: Density gradient column method (ISO 1183-2: 2004, MOD)

GB/T 1033.3-2010, Plastics -- Methods for determining the density of non-cellular plastics -- Part 3: Gas pycnometer method (ISO 1183-3:1999, IDT)

GB/T 19466.2-2004, Plastics -- Differential scanning calorimetry (DSC) -- Part 2:

Determination of glass transition temperature (ISO 11357-2:1999, IDT)

GB/T 19466.3-2004, Plastics -- Differential scanning calorimetry (DSC) -- Part 3:

Determination of temperature and enthalpy of melting and crystallization (ISO

11357-3:1999, IDT)

GB/T 19467.1-2004, Plastics -- Acquisition and presentation of comparable single- point data -- Part 1: Moulding materials (ISO 10350-1:1998, MOD)

ISO11359-2:1999, Plastics - Thermomechanical analysis (TMA) - Part 2:

Determination of coefficient of linear thermal expansion and glass transition temperature

ISO 20753:2008, Plastics - Test specimens

IEC 60296:2012, Specification for unused mineral insulating oils for transformers and switchgear)

3 Preparation of specimens