GB/T 45710-2025Determination of oligomers in polyethylene terephthalate fibre and chip — Advanced polymer chromatography (APC) (English PDF)

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.

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 is proposed and coordinated by the National Technical Committee on Standardization of Chemical Fibers (SAC/TC586).

This document was drafted by: Zhejiang Sci-Tech University, Modern Textile Technology Innovation Center (Jianhu Laboratory), Zhejiang Tongkun New Materials Research Institute Co., Ltd., China Chemical Fiber Industry Association, Jiangsu Hengli Chemical Fiber Co., Ltd., Xinfengming Group Co., Ltd., Shanghai Textile Industry Industry Technical Supervision Institute, Sinopec Yizheng Chemical Fiber Co., Ltd., Fujian Sailon Technology Co., Ltd., Wuxi Jintong High Fiber Co., Ltd., Yuyao Dafa Chemical Fiber Co., Ltd., Zhejiang Guxiandao Green Fiber Co., Ltd., Zhejiang Yuyue New Materials Co., Ltd., Dezhou Shengyuan Fiber Science and Technology Co., Ltd.

Technology Co., Ltd., Zhejiang Hengchuang Advanced Functional Fiber Innovation Center Co., Ltd., and Shanghai Textile Group Testing Standards Co., Ltd.

The main drafters of this document are: Lv Wangyang, Chen Wenxing, Chen Haixiang, Zhu Wei, Jin Gaoling, Wang Jianhua, Zhang Xuefeng, Li Deli, Li Hongjie, Su Fengxian, Zhu Enbin, Qian Qiyuan, Gu Jun, Yang Zhichao, Sun Wenxun, Wang Xinzhong, Fan Chenxi, Dong Xiaotang, Lin Zhenyong.

Polyethylene terephthalate fiber and chips Determination of polymers by high performance polymer chromatography (APC) Warning---People who use this document should have practical experience in formal laboratory work. This document does not address all possible safety issues.

The user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national laws and regulations.

For certain solvents, please read the Material Safety Data Sheet (SDS) carefully.

1 Scope

This document describes a test method for the determination of oligomer content in polyethylene terephthalate (PET) by high performance polymer chromatography.

This document is applicable to polyethylene terephthalate fibers and chips, and other PET products shall be implemented accordingly.

2 Normative references

GB/T 4146

3 Terms and definitions

GB/T 4146 (all parts) and the following terms and definitions apply to this document.

4 Principle

Dissolve the PET sample with hexafluoroisopropanol, slowly add tetrahydrofuran to reprecipitate the PET macromolecules in the solution, and filter the solution.

Afterwards, the oligomer components were separated by high performance polymer chromatography, and the oligomer content in the sample was calculated based on the component concentration and its peak area. content.

5 Reagents or materials

5.1 Hexafluoroisopropanol. CAS No. 920-66-1, purity >= 99.5%.

5.2 Tetrahydrofuran. CAS No. 109-99-9, chromatographic grade.

5.3 Standard sample of fiber-grade polyester chips (GSB10-1332-F05).