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GB/T 33047.3-2021Plastics - Thermogravimetry (TG) of polymers - Part 3: Determination of the activation energy using the Ozawa-Friedman plot and analysis of the reaction kinetics (English PDF)

塑料聚合物热重法（TG）第3部分：使用 Ozawa-Friedman 绘图测定活化能和分析反应动力学

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

August 20, 2021

Implementation date

March 1, 2022

Scope

GB/T 33047.3-2021 is the English-translated version of 塑料聚合物热重法（TG）第3部分：使用 Ozawa-Friedman 绘图测定活化能和分析反应动力学.

GB/T 33047.3-2021 is the Chinese standard "Plastics - Thermogravimetry (TG) of polymers - Part 3: Determination of the activation energy using the Ozawa-Friedman plot and analysis of the reaction kinetics".

Its scope clause reads: This document specifies a method for determining activation energy using Ozawa-Friedman plots. This document also stipulates the use of thermogravimetric method to verify The method of master curve of reaction kinetics.

Ozawa-Friedman drawing (under a certain mass loss, compose the reciprocal of the temperature under the mass loss with the logarithm of the mass loss rate Line) is a differential method that can be applied to thermal analysis of any temperature change program, such as constant temperature, constant heating rate, sample volume control heat Analysis, temperature steps and repeated temperature scans. Its clauses include terms and definitions.

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Document preview — GB/T 33047.3-2021

National Standard of the People's Republic of China

Classification: G 31

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
Introduction
1 Scope

1 Scope

This document specifies a method for determining activation energy using Ozawa-Friedman plots. This document also stipulates the use of thermogravimetric method to verify

The method of master curve of reaction kinetics.

Ozawa-Friedman drawing (under a certain mass loss, compose the reciprocal of the temperature under the mass loss with the logarithm of the mass loss rate

Line) is a differential method that can be applied to thermal analysis of any temperature change program, such as constant temperature, constant heating rate, sample volume control heat

Analysis, temperature steps and repeated temperature scans.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

ISO 11358-1 Plastics Polymer Thermogravimetry (TG) Method Part 1.General (Plastics-Thermogravimetry (TG) of polymers-Part 1.Generalprinciples)

ISO 11358-2 Plastics Polymer Thermogravimetric Method (TG) Part 2.Determination of Activation Energy (Plastics-Thermogravimetry (TG)ofpolymers-Part 2.Determinationofactivationenergy)

3 Terms and definitions

The following terms and definitions defined by ISO 11358-1 and ISO 11358-2 apply to this document.

3.1 Conversion rate

C= mt-mi/mf-mi

Where.

mi---initial mass, in milligrams (mg);

mt---the mass at a specific time and temperature, in milligrams (mg);

mf---Residual mass at the end of the reaction, in milligrams (mg).

See ISO 11358-1 and ISO 11358-2.

Note 1.It is usually also referred to as the mass loss score.

Note 2.The conversion rate is dimensionless, and the value ranges from 0 to 1.

3.2 Generalized time

tgen […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 11358

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