GB/T 33047.2-2021 English PDF

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GB/T 33047.2-2021: Plastics - Thermogravimetry (TG) of polymers - Part 2: Determination of activation energy
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 33047.2-2021	184	Add to Cart	3 days	Plastics - Thermogravimetry (TG) of polymers - Part 2: Determination of activation energy	Valid

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Basic data

Standard ID: GB/T 33047.2-2021 (GB/T33047.2-2021)
Description (Translated English): Plastics - Thermogravimetry (TG) of polymers - Part 2: Determination of activation energy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G31
Word Count Estimation: 10,169
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 33047.2-2021: Plastics - Thermogravimetry (TG) of polymers - Part 2: Determination of activation energy

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Plastics - Thermogravimetry (TG) of polymers - Part 2.Determination of activation energy ICS 83.080.01 CCSG31 National Standards of People's Republic of China Plastic polymer thermogravimetry (TG) Part 2.Determination of activation energy (ISO 11358-2.2014, IDT) Released on 2021-08-20 2022-03-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is the second part of GB/T 33047 "Plastic Polymer Thermogravimetry (TG)". GB/T 33047 has released the following part. ---Part 1.General rules; ---Part 2.Determination of activation energy; ---Part 3.Use Ozawa-Friedman plot to determine activation energy and analyze reaction kinetics. The translation method used in this document is equivalent to ISO 11358-2.2014 ``Plastic Polymer Thermogravimetric Method (TG) Part 2.Activation Energy Determination". The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows. ---GB/T 33047.1-2016 Plastic Polymer Thermogravimetric Method (TG) Part 1.General (ISO 11358-1.2014, MOD) This document has made the following editorial changes. ---Renumber the formula; ---3.3 added "Note 4.It is also called mass loss score". This document was proposed by the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC15). Drafting organizations of this document. Zhonglan Chenguang Chengdu Testing Technology Co., Ltd., Guangzhou Weike Environmental Protection Technology Co., Ltd., Anhui Xinsu Pipe Industry Section Technology Co., Ltd., Guangzhou Institute of Quality Supervision and Inspection, Shandong Dawn Polymer Materials Co., Ltd., Suzhou Runjia Engineering Plastics Co., Ltd. Co., Ltd., China Petroleum & Chemical Corporation Beijing Research Institute of Chemical Industry, Xiamen Defengxing Plastic Industry Co., Ltd., Beijing Physical and Chemical Analysis Testing Center, Liaocheng University, Dongguan Guangzheng Mould Plastic Co., Ltd., Shandong Non-metallic Materials Research Institute, Jilin Province Product Quality Supervision and Inspection Institute, China General Nuclear Power Juner (Zhejiang) New Materials Co., Ltd., Qingdao Dagang Customs, People’s Republic of China, Global Energy Internet Research Institute Co., Ltd. company. The main drafters of this document. Cao Jinpeng, Wang Jing, Li Juan, Li Xiaozeng, Wang Zhiping, Wang Liwen, Guo Ruohai, Huang Zhiqin, Li Qinmei, Teng Mouyong, Zhang Buyue, Wang Xuerong, Li Shangyu, Lin Xiankai, Gao Jianguo, Wang Wanjuan, Rosa, Hu Guanghui, Gao Xia, Ji Zhuang, Sun Yan, Yu Riming, Guo Yingying, Chen Xin, Zhang Chong. Plastic polymer thermogravimetry (TG) Part 2.Determination of activation energy

1 Scope

This document specifies a method to determine the activation energy Ea in the Arrhenius equation of the polymer decomposition reaction using the thermogravimetric method. This method is only suitable for reactions with a single mechanism. For multi-step reactions, the reaction mechanism of each step is single.

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 Plastic Polymer Thermogravimetry (TG) Method Part 1.General Principles [Plastics-Thermogravimetry (TG) of polymers-Part 1.Generalprinciples]

3 Terms and definitions

ISO 11358-1 and the following terms and definitions apply to this document. 3.1 Arrhenius equation Arrhenius formula The formula for the relationship between the rate constant of a chemical reaction and the temperature. Note. The reaction rate constant k, expressed by Arrhenius equation (1), is as follows. k=Aexp-Ea/RT (1) Where. R---gas constant, 8.314J·K-1·mol-1; T---absolute temperature, the unit is open (K); A-refers to the former factor, the unit is per second (s-1); Ea---activation energy, in units of coke per mole (Jmol-1); k ---Reaction rate constant (=dα/dt), the unit is per second (s-1). 3.2 Activationenergy Ea The energy required for an atom or molecule to change from a ground state to an active state where chemical reactions easily occur. Note. The unit is joule per mole (J·mol-1). 3.3 Conversion rate degreeofconversion The ratio of the mass loss of the reaction at a specific time and temperature to the final mass loss. Note 1.Given by equation (2). α = (mi-mt)/(mi-mf) (2) ......

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