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GB/T 45469-2025Microbeam analysis — Transmission electron microscopy — Preparation methods of ultrathin section of polymer composites (English PDF)

微束分析透射电子显微术聚合物复合材料超薄切片制备方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 28, 2025

Implementation date

October 1, 2025

Scope

GB/T 45469-2025 is the English-translated version of 微束分析透射电子显微术聚合物复合材料超薄切片制备方法.

GB/T 45469-2025 is the Chinese national standard covering cutting a polymer composite thin enough for an electron beam to pass through it — the sample preparation and the trimming of the block, the sectioning at room temperature or under freezing conditions, the glass transition temperature of the matrix that decides which of the two is possible, the reagent formulas given for the work, the handling of the sections, and the observation of the specimen in the transmission electron microscope. First edition, in force from 1 October 2025. Issued on 28 March 2025, it has been in force since 1 October 2025.

Document preview — GB/T 45469-2025

National Standard of the People's Republic of China

ICS: 71.040.99
Classification: G 04

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
IntroductionIV
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Sample Preparation2
5 Ultrathin section preparation3
6 Transmission electron microscopy of ultrathin section specimens6
Appendix A (Informative) Formulas of Commonly Used Reagents7
Appendix B (Informative) Glass transition temperature of polymers9
Reference11

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 for standardization documents" Drafting is required.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed and coordinated by the National Microbeam Analysis Standardization Technical Committee (SAC/TC38).

The drafting units of this document. Zhejiang University, Fudan University, Shanghai Jiao Tong University, and Jiangsu Leibo Scientific Instrument Co., Ltd.

The main drafters of this document are: Hong Jian, Wang Hua, Zhang Xiaomin, Zhao Xiaohuan, Zhou Guangrong, Wang Ge, Zheng Xi, Xu Ying, Xia Qiuhua.

Introduction

When using transmission electron microscopy to observe polymer composites, ultrathin section sample preparation is the key.

The multi-component, multi-phase system with different chemical properties and various reinforcing materials and filling materials has excellent mechanical and other properties.

So far, there is no unified technology for preparing ultrathin sections of polymer composites under electron microscopy.

In order to standardize the preparation method of electron microscope ultrathin sections of polymer composites, This document is specially formulated.

Microbeam analysis transmission electron microscopy Preparation method of ultra-thin slices of polymer composite materials

1 Scope

This document specifies the method and technical specifications for the preparation of ultrathin section samples of polymer composites for transmission electron microscopy observation.

This document is applicable to the preparation of polymer composite samples that can be ultra-thinly sectioned at room temperature or under freezing conditions.

2 Normative references

GB/T 30544.4-2019

3 Terms and definitions

The terms and definitions defined in GB/T 30544.4-2019 and the following apply to this document.

3.1 polymer

A high molecular weight compound composed of one or several structural units repeatedly connected by covalent bonds.

3.2 Polymer composite material polymercomposite

A multi-component, multi-phase system with polymer as the matrix and various reinforcing materials and filling materials, which has excellent mechanical properties. And other performance.

3.3 Nanoscale

The size range is about 1nm~100nm.

NOTE 1 This size range generally, but not exclusively, exhibits properties that cannot be extrapolated from larger sizes. For these properties, the upper and lower limits of the scale are is approximate.

Note 2.The purpose of introducing a lower limit (about 1 nm) in this definition is to avoid the default of a single or small cluster of atoms being a nano-object or nano-structure when no lower limit is set. unit.

[Source. GB/T 30544.4-2019, 2.1]

3.4 Nanomaterials

Any material whose external dimension, internal or surface structure is at the nanoscale.

NOTE This generic term includes nano-objects and nano-structured materials.

[Source. GB/T 30544.4-2019, 2.3]

3.5 Nanocomposite

A solid mixture consisting of two or more phase-separated materials, one or more of which is a nanophase.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 30544.4-2019

Editions of GB/T 45469

Edition	Title	Revision	Status
GB/T 45469-2025	Microbeam analysis - Transmission electron microscopy - Preparation methods of ultrathin section of polymer composites	current edition	Current

This page sells the current edition, GB/T 45469-2025. Earlier editions are listed for reference only.

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