GB/T 42919.1-2023 English PDF

US$419.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42919.1-2023: Plastics - Determination of thermal conductivity and thermal diffusivity - Part 1: General principles
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42919.1-2023	419	Add to Cart	4 days	Plastics - Determination of thermal conductivity and thermal diffusivity - Part 1: General principles	Valid

Similar standards

GB/T 42976   GB/T 42977   GB/T 42924.1   GB/T 42919.6   GB/T 42918.2   GB/T 42919.4   

Basic data

Standard ID: GB/T 42919.1-2023 (GB/T42919.1-2023)
Description (Translated English): Plastics - Determination of thermal conductivity and thermal diffusivity - Part 1: General principles
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G31
Classification of International Standard: 83.080.01
Word Count Estimation: 22,215
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42919.1-2023: Plastics - Determination of thermal conductivity and thermal diffusivity - Part 1: General principles

---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.
ICS 83.080.01 CCSG31 National Standards of People's Republic of China Determination of thermal conductivity and thermal diffusion coefficient of plastics Part 1.General principles Part 1.Generalprinciples Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is Part 1 of GB/T 42919 "Determination of Thermal Conductivity and Thermal Diffusion Coefficient of Plastics". GB/T 42919 has been issued The following parts have been published. ---Part 1.General principles; ---Part 3.Temperature wave analysis method; ---Part 4.Laser flash method; ---Part 6.Comparative method based on temperature modulation technology. This document has been modified to adopt ISO 22007-1.2017 "Determination of thermal conductivity and thermal diffusivity of plastics - Part 1.General principles". Compared with ISO 6721-6.2019, this document has many structural adjustments. Comparison list of structure number changes between two files See Appendix A for the table. The technical differences between this document and ISO 22007-1.2017 and their reasons are as follows. ---Replaced ISO 472 with normatively quoted GB/T 2035 to adapt to my country's technical conditions; ---The ideal model in Table 2 is changed from ds/h >10, diameter ds or sample side length greater than 10mm to ds/h >3, diameter ds or sample The sample side length is 5mm~20mm to meet the technical requirements of GB/T 42919.4; ---The sample size in 5.2.5 is changed from "usually the diameter is 10mm~20mm, the thickness is 1mm~3mm" to "the usual diameter is 10mm~20mm, the thickness is 1mm~3mm" 5mm~20mm, thickness 0.5mm~3mm", short laser or flash pulse wavelength changed from "< 500μs" to "< 1ms" to adapt to the technical requirements of GB/T 42919.4; ---The coefficient in formula (10) is changed from 0.1388 to 0.13879 to adapt to the technical requirements of GB/T 42919.4. The following editorial changes have been made to this document. ---The symbol of the characteristic parameter sample thickness is changed from w to h (see Table 2); --- Added informative references to GB/T 42919.3, GB/T 42919.4 (see 5.1 and Appendix B) and GB/T 42919.6 (see Appendix B); ---Replaced ISO 8302 with the informative reference GB/T 10294 (see 5.3.1); ---Added Appendix A (informative) "List of comparison of structure numbers between this document and ISO 22007-1.2017". Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC15). This document was drafted by. Zhonglan Chenguang Chengdu Testing Technology Co., Ltd., Chengdu Tuoli Technology Co., Ltd., China University of Science and Technology Science, China Aviation Manufacturing Technology Research Institute, Xiamen Hualda Intelligent Technology Co., Ltd., Shandong Non-metallic Materials Research Institute, Sinopec (Beijing) Chemical Industry Research Institute Co., Ltd., Chongqing Plite New Materials Co., Ltd., Dongguan Shishixing New Materials Co., Ltd., Guangdong Nancang Electric Co., Ltd. Cable Co., Ltd., Qingdao Ocean New Material Technology Co., Ltd., Jilin Provincial Product Quality Supervision and Inspection Institute, Qingdao Hairong Commercial Cold Chain Co., Ltd. The company, Qingdao Haina New Materials Co., Ltd., Liaocheng University, Qingdao Dagang Customs of the People's Republic of China, Kegonas Instrument Trading (Shanghai) have Co., Ltd., Guangdong Qide New Materials Co., Ltd., Guangdong Gray New Materials Co., Ltd., Aerospace Special Materials and Process Technology Research Institute. The main drafters of this document. Cao Jinpeng, Zhang Chengxi, Jin Yi, Dai Ling, Peng Kesheng, Zhang Xia, Li Qiang, Yang Yong, Cai Qing, Fang Peiji, Ke Zhixin, Liu Peili, Li Shangyu, Ma Hongkui, Zhang Xiuwen, Teng Mouyong, Gao Jianguo, Li Gang, Rao Desheng, Zheng Yuhang, Wang Yang.

Introduction

Thermal conductivity and thermal diffusivity can be measured using different methods, and some methods may be more suitable for specific types and conditions than other techniques. state and form of materials. This document provides an overview of these methods. Various methods described in this document have corresponding standards and are applied in practice testing. GB/T 42919 specifies methods for measuring the thermal conductivity and thermal diffusion coefficient of plastics based on various principles. It is planned to consist of six parts. ---Part 1.General principles. The purpose is to establish common definitions and methods for measuring thermal conductivity and thermal diffusivity. content. ---Part 2.Transient plane heat source (hot plate) method. The purpose is to determine the transient plane of the thermal conductivity and thermal diffusivity of plastics. Heat source (hot plate) method establishes operable, traceable, and verifiable procedures. ---Part 3.Temperature wave analysis method. The purpose is to establish a temperature wave analysis method for measuring the thermal conductivity and thermal diffusion coefficient of plastics. Actionable, traceable, and verifiable procedures. ---Part 4.Laser flash method. The purpose is to establish an operable method for the laser flash method to determine the thermal conductivity and thermal diffusion coefficient of plastics. operational, traceable, and verifiable procedures. ---Part 5.Interlaboratory test results of polymethylmethacrylate samples. The purpose is to conduct polymethylpropylene testing through multiple laboratories. The thermal conductivity and thermal diffusion coefficient of methyl olefinate are measured and test data are provided. ---Part 6.Comparative method based on temperature modulation technology. The purpose is to provide a method for determining the ratio of low thermal conductivity using temperature modulation techniques. Compare laws and establish operable, traceable and verifiable procedures. Determination of thermal conductivity and thermal diffusion coefficient of plastics Part 1.General principles Warning. Personnel using this document should be familiar with normal laboratory operations, where applicable. This document is not intended to address issues related to its use security issues (if any). It is the user's responsibility to establish appropriate safety and health safeguards and ensure compliance with all regulatory requirements.

1 Scope

This document establishes general principles for the determination of thermal conductivity and thermal diffusivity of polymeric materials. This document is applicable to the determination of thermal conductivity and thermal diffusion coefficient of polymer materials.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 2035 Plastic terms and definitions (GB/T 2035-2008, ISO 472.1999, IDT)

3 Terms and definitions

The terms and definitions defined in GB/T 2035 and below apply to this document. 3.1 heatpulseheatpulse Pulses generated by changes in heat from a heat source. 3.2 heatpulseenergyheatpulseenergy The heat of a thermal pulse generated by a heat source. Note. The unit is Joule (J). 3.3 heat sourceheatsource A wire, strip, plate or foil embedded or attached to a specimen, or an area to which incident light (such as a laser) is applied. 3.4 heat fluxheatflux The heat output produced by a planar heat source per unit time and unit area. Note. The unit is Watts per square meter (W/m2). 3.5 linearheatflowlinearheatflow The heat output produced by a line source per unit time and unit length. Note. The unit is watts per meter (W/m). ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42919.1-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42919.1-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 42919.1-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42919.1-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.