GB/T 31984-2015 English PDF

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GB/T 31984-2015: Test method for determining the content of vinyl acetate in ethylene-vinyl acetate copolymer applied in photovoltaic modules -- Thermal gravimetric analysis (TGA)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31984-2015	149	Add to Cart	3 days	Test method for determining the content of vinyl acetate in ethylene-vinyl acetate copolymer applied in photovoltaic modules -- Thermal gravimetric analysis (TGA)	Valid

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Basic data

Standard ID: GB/T 31984-2015 (GB/T31984-2015)
Description (Translated English): Test method for determining the content of vinyl acetate in ethylene-vinyl acetate copolymer applied in photovoltaic modules -- Thermal gravimetric analysis (TGA)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L90
Classification of International Standard: 31-030
Word Count Estimation: 7,723
Date of Issue: 2015-09-11
Date of Implementation: 2016-05-01
Regulation (derived from): National Standard Announcement 2015 No.25
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 31984-2015: Test method for determining the content of vinyl acetate in ethylene-vinyl acetate copolymer applied in photovoltaic modules -- Thermal gravimetric analysis (TGA)

---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.
Test method for determining the content of vinyl acetate in ethylene-vinyl acetate copolymer applied in photovoltaic modules - Thermal gravimetric analysis (TGA) ICS 31-030 L90 National Standards of People's Republic of China PV modules with ethylene - vinyl acetate copolymer Vinyl acetate content of the test method Thermal gravimetric analysis (TGA) copolymerappliedinphotovoltaicmodules-Thermalgravimetricanalysis (TGA) Issued on. 2015-09-11 2016-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents. The standard equipment by the National Standardization Technical Committee and the semiconductor material (SAC/TC203) and focal points. This standard was drafted. Changzhou Trina Solar Energy Co., Ltd., Hangzhou First PV Material Co., Ltd., National Solar PV production Product Quality Supervision and Inspection Center, Changzhou PV SVEC New Materials Co., Ltd. Zhejiang Jiang Dilong photovoltaic materials, photovoltaic materials Wenzhou Sunrise Expected Ltd., China Electronics Standardization Institute, Canadian Solar Power Technology Co., Ltd. Changshu. The main drafters of this standard. Xiao Yun Tao, Feng Zhiqiang, China Everbright week, Hou Hongbing, Zhu Gang, Zhao Liang, Yongming, Zhanxian Guang, Fengya Bin, Peng Lixia. PV modules with ethylene - vinyl acetate copolymer Vinyl acetate content of the test method Thermal gravimetric analysis (TGA)

1 Scope

This standard specifies the determination of PV modules using thermal gravimetric analysis (TGA) with ethylene - vinyl acetate copolymer (hereinafter referred to as EVA) in vinegar The method of vinyl acetate (hereinafter referred to as VA) content, including the principle of the method, sample preparation, equipment and materials, test environment, test procedures, results Processing and reporting. This standard is applicable for use in VA content EVA analysis of photovoltaic modules.

2 principle of the method

Thermal gravimetric analysis procedure is controlled temperature, measuring the quality of the material varies with temperature relationship. Quality can be used to characterize the material with temperature The characteristic changes, material changes due to decomposition analysis by mass, oxidation or dehydration caused. EVA occurs when more than 250 ℃ thermal decomposition, The first EVA acetate groups off and the amount of decomposition of acetic acid, acetic acid is proportional to the decomposition of the VA content EVA and. This method Take advantage of EVA thermal decomposition mass versus temperature relationship of VA content EVA measurement.

3 Sample Preparation

3.1 Sample Applications goods packaging clean and well marked, the sample containers should be placed in the drying process drying over 6h. 3.2 Sampling should wear clean gloves, clipping from a sample 5mg ~ 15mg as a sample.

4 instruments and materials

4.1 Thermal gravimetric analysis includes the following sections. a) Balance. it is a key component of the TGA, for accurate measurement of the quality of the sample, accuracy of 0.01mg or better; b) heating furnace. the sample is heated to the temperature of the sample and control; c) a heat exchanger. a circulating heat function, mainly for the furnace heat exchanger; d) gas flow controller. for control, metering purge shielding gas. 4.2 is first installed thermal gravimetric analysis should be carried out mass and temperature calibration. TGA course, should be based on frequency of use times, use Conditions and equipment supplier's recommendations, regular mass, temperature calibration. 4.3 shielding gas purification. to sweep, clean, balance and protection of the furnace, usually using nitrogen purge gas (purity. ≥99.99%).

5 Test Environment

5.1 ambient temperature (25 ± 2) ℃. 5.2 relative humidity of (50 ± 5)%. 5.3 TGA console should remain stable, vibration-free, it is recommended to use marble countertops. ......

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