GB/T 19466.2-2004 in English

《GB/T 19466.2-2004塑料 差示扫描量热法（DSC） 第2部分:玻璃化转变温度的测定》由TC15（全国塑料标准化技术委员会）归口，TC15SC4（全国塑料标准化技术委员会通用方法和产品分会）执行，主管部门为中国石油和化学工业联合会。
GB/T19466.2的本部分规定了测定无定形聚合物和半结晶聚合物玻璃化转变特征温度的方法。

Plastics — Differential Scanning Calorimetry (DSC) — Part 2: Determination of Glass Transition Temperature

Warning — The use of this International Standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate health and safety practices and to determine the applicability of regulatory limitations prior to use.

1 Scope

This part of GB/T 19466 specifies a method for the determination of the characteristic glass transition temperatures of amorphous and semi-crystalline plastics.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 19466. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. 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 19466.1-2004 Plastics — Differential Scanning Calorimetry (DSC) — Part 1: General Principles

3 Terms and Definitions

For the purposes of this part, the terms and definitions given in GB/T 19466.1 and the following apply.

3.1
glass transition
the reversible change in an amorphous polymer or in amorphous regions of a partially crystalline polymer from (or to) a viscous or rubbery condition to (or from) a hard and relatively brittle one

Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 Principle
5 Apparatus and Materials
6 Test Specimens
7 Test Conditions and Specimen Conditioning
8 Calibration
9 Procedure
10 Expression of Results
11 Precision
12 Test Report
Annex A (Informative) Precision for Measurements of PS, HIPS and ABS
Bibliography