GB/T 34917-2017 English PDF

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GB/T 34917-2017: Determination of gelation degree of unplasticized poly (vinyl chloride) (PVC-U) products -- Torque rheometer method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34917-2017	199	Add to Cart	3 days	Determination of gelation degree of unplasticized poly (vinyl chloride) (PVC-U) products -- Torque rheometer method	Valid

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Basic data

Standard ID: GB/T 34917-2017 (GB/T34917-2017)
Description (Translated English): Determination of gelation degree of unplasticized poly (vinyl chloride) (PVC-U) products -- Torque rheometer method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G33
Classification of International Standard: 83.140.01
Word Count Estimation: 10,167
Date of Issue: 2017-11-01
Date of Implementation: 2018-05-01
Regulation (derived from): National Standard Announcement 2017 No. 29
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34917-2017: Determination of gelation degree of unplasticized poly (vinyl chloride) (PVC-U) products -- Torque rheometer method

---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.
Determination of gelation degree of unplasticized poly (vinyl chloride) (PVC-U) products-Torque rheometer method ICS 83.140.01 G33 National Standards of People's Republic of China Determination of gelation of hard polyvinyl chloride (PVC-U) products Torque Rheometer method Determinationofgelationdegreeofunplasticizedpoly (vinylchloride) (PVC-U) products-Torquerheometermethod Posted.2017-11-01 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard by the National Quality Supervision Key Products Testing Methods Standardization Technical Committee (SAC/TC374) and focal point. This standard was drafted unit. Guangzhou Quality Supervision, Inspection and Research Institute, the quality of Warner (Beijing) Technology Center Co., Ltd., the Federation of inspection (North Beijing) Quality Inspection Technology Institute Co., Ltd., Foshan Gu Plastic Co., Ltd., South plastic building materials plastic products (Shenzhen) Co., Ltd., Zhongshan Universal reality Co., Ltd., Zhejiang Bond Pipe Co., Ltd., Wing High Co., Ltd., Zhejiang Weixing New Building Materials Co., Ltd., Guangxi Wuzhou five A Plastic Products Co., Ltd., Guangdong Ruotian New Material Technology Co., Ltd., Hebei Fine Chemical Group Co., Ltd., Chengdu Chuan Road Plastic Group Co., Ltd., Guangzhou General Experimental Analysis Instruments Co., Ltd., Jiangxi yuan Choi Pipeline Technology Co., Ltd., Guangdong Liansu Technology Industry Co., Ltd. Secretary, National Polymer Engineering Materials and Products Quality Supervision and Inspection Center (Guangdong). The main drafters of this standard.Pan Yonghong, Wang Wenzhi, Wang rolls, Zhao Xia, Zhang Chengyao, Huang Jian, Chen Weili, Yuan Yuan Zhuo, Yu Qiaoling, Liang Xiaojuan, Wang Zhiming, Song Keming, Rong Teng, Zhang Canming, Liu Zhijian, Hu Ruiqi, Wang Wenbi, He Anhua, Zhao Chengfang, Tao Yuejie, He Guoshan, Xu Yunqi, Li Xiaozeng, Wei Yuanfang, Sun Xiuhui, Hu Tingyong, Hou Xiaobing. Determination of gelation of hard polyvinyl chloride (PVC-U) products Torque Rheometer method

1 Scope

This standard specifies the use of torque rheometer determination of rigid polyvinyl chloride (hereinafter referred to as PVC-U) gelation method. This standard applies to the determination of the degree of gelation of PVC-U products, PVC-U is also suitable for processing PVC-U gelation process Degree of determination.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 1033.1 Determination of plastic non-foam density - Part 1. Immersion method, liquid pyknometer method and titration method

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 PVC gelation of PVC Under the action of thermal energy and mechanical energy, the multi-layer structure of PVC resin particles gradually deconstructs and breaks into primary particles, and most of the micro-crystals The melted, microcrystalline melts at the primary particle interface release the banding molecules through the adjacent primary particles. Subsequently, the cooled microcrystal is cooled down to generate secondary Raw microcrystalline, the primary microcrystalline primary particles of the primary microcrystal will be linked into a three-dimensional network structure with secondary crystallites as crosslinking points. Note. The gelation of PVC can also be referred to as fusion of PVC. 3.2 Gelation degree of gelation The degree of progress of PVC gelation. Note. The degree of gelation can also be referred to as the degree of degree of fusion. 3.3 Reference compound referencecompounds The recipe is exactly the same as the sample being tested, and the compound does not gel the PVC during the compounding process.

4 principle

For the same PVC compound, the higher the degree of gelation, the smaller the torque torque curve of the minimum torque, the gelation torque and minimum torque The smaller the difference, the gel of the test sample can be calculated from the ratio of this difference of the sample to the reference compound Degree of. NOTE In several cases, the torque flow curves are given in Appendix A, Appendix B, Appendix C. ......

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