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GB/T 12010.5-2010: Plastic -- Poly (vinyl alcohol) (PVAL) materials -- Part 5: Determination for average polymerization degree
Status: Valid GB/T 12010.5: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12010.5-2010 | English | 78 |
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Plastic -- Poly (vinyl alcohol) (PVAL) materials -- Part 5: Determination for average polymerization degree
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GB/T 12010.5-2010
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| GB/T 12010.5-1989 | English | 199 |
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Determination for residual acetic radical contents (or alcoholysis) of polyvinyl alcohol resins
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GB/T 12010.5-1989
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Basic data | Standard ID | GB/T 12010.5-2010 (GB/T12010.5-2010) | | Description (Translated English) | Plastic -- Poly (vinyl alcohol) (PVAL) materials -- Part 5: Determination for average polymerization degree | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080 | | Word Count Estimation | 6,60 | | Date of Issue | 2010-09-02 | | Date of Implementation | 2011-05-01 | | Older Standard (superseded by this standard) | GB/T 12010.9-1989 | | Quoted Standard | GB/T 603; GB/T 6682 | | Adopted Standard | JIS K6726-1994 (2003), NEQ | | Regulation (derived from) | National Standard Approval Announcement 2010 No.4 (Total No.159) | | 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 | | Summary | This standard specifies the Ostwald viscometer with an aqueous solution of polyvinyl alcohol material viscosity characteristics intrinsic viscosity is calculated by the average degree of polymerization of the polyvinyl material. This section applies to the determination of the average degree of polymerization of greater than 70% alcohol solution (molar fraction) of polyvinyl alcohol material. | GB/T 12010.5-2010: Plastic -- Poly (vinyl alcohol) (PVAL) materials -- Part 5: Determination for average polymerization degree
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Plastic Poly (vinyl alcohol) (PVAL) materials Part 5. Determination for average polymerization degree
ICS 83.080
G31
National Standards of People's Republic of China
Replacing GB/T 12010.9-1989
Plastic material polyvinyl alcohol (PVAL)
Part 5. Determination of average degree of polymerization
Plastic-Poly (vinylalcohol) (PVAL) materials-
Part 5. Determinationforaveragepolymerizationdegree
Issued on. 2010-09-02
2011-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 12010 "plastic material polyvinyl alcohol (PVAL)" is divided into eight sections.
--- Part 1. Designation system and basis;
--- Part 2. Performance measurement;
--- Part 3. Specifications;
Part --- Chapter 4. pH value measurement;
--- Part 5. Determination of the average degree of polymerization;
--- Part 6. Determination of particle size;
--- Part 7. Determination of sodium hydroxide;
--- Part 8. Determination of transparency.
This section GB/T Part of 512,010, and JISK6726.1994 (2003 Confirmafion) "polyvinyl alcohol test method" (Japanese
Version) The non-equivalent.
This Part replaces GB/T 12010.9-1989 "Determination of average polymerization degree of polyvinyl alcohol."
This section compared with the GB/T 12010.9-1989 The main changes are as follows.
--- Increasing the reference document (Chapter 2 of this edition);
--- The 30 ℃ when water flows in the Ostwald viscometer adjusted by the time (100 ± 10) s to (100 ± 20) s (1989 version 4.12, this
Version 5.1);
--- Increased the degree of hydrolysis of 97% (mole fraction) above PVA material pretreatment (edition 6.1);
--- High alkali, low alkali alcoholysis polyvinyl specimen sample weight for a unified (1989 Version 5, this version 6.2).
This part is proposed by the China Petroleum and Chemical Industry Association.
This part of the National Standardization Technical Committee of plastic products and plastic resins General Methods Chapter (SAC/TC15/SC4) centralized.
This section is responsible for drafting unit. Hunan Xiangwei Limited.
This section participated in the drafting unit. China Petrochemical Group of Sichuan Vinylon Works, Ltd. Yunnan Yun-dimensional, synthetic resin national quality supervision
Governor Inspection Center.
The main drafters of this section. Tangsong Qiao, Shu Xiaoyan, small Yang Lu, Zhu Zeli, Yan Hong, Li Bin, Hui cold leather, Wangyong Gui, Wang Yan.
This part of the standard replaces the previous editions are.
--- GB/T 12010.9-1989.
Plastic material polyvinyl alcohol (PVAL)
Part 5. Determination of average degree of polymerization
1 Scope
This section GB/T 12010 specifies the Ostwald viscometer with an aqueous solution of polyvinyl alcohol material viscosity properties were measured by the intrinsic viscosity calculation
The method of average degree of polymerization of the polyvinyl alcohol material.
This section applies to the determination of the average degree of polymerization of the alcohol solution is greater than 70% (mole fraction) of the polyvinyl alcohol material.
2 Normative references
The following documents contain provisions which, through reference GB/T 12010 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 603 chemical reagent in test methods - Preparations with
Laboratory use specifications and test methods GB/T 6682 Analysis
Principle 3
Determination of intrinsic viscosity aqueous solution of polyvinyl alcohol, polyvinyl alcohol calculates an average degree of polymerization of the material.
4 Reagents
When this part of the reagents and water, unless otherwise specified, refer to analytically pure reagents and GB/T 6682 in the third grade water.
As used in this part of the preparations and products, except where noted according to GB/T 603 formulation.
4.1 methanol.
4.2 Sodium hydroxide solution. c (NaOH) = 12.5mol/L.
Weigh 500g of sodium hydroxide, dissolved in water and diluted to 1000mL.
4.3 Phenolphthalein. 10g/L ethanol solution.
5 Instruments
5.1 Ostwald viscometer. Specifications Figure 1, made of hard glass.
Note. 30 ℃, the water from A to B tick tick flowing time should be within (100 ± 20) s of.
5.2 glass frit funnel. No. P100 sintered glass.
5.3 Buchner funnel. diameter 100mm.
5.4 suction flask. 1L.
5.5 Oven. to maintain (105 ± 2) ℃.
5.6 Stopwatch. accurate to 0.1s.
5.7 constant temperature water bath. (30.0 ± 0.1) ℃.
5.8 Pipette. 10mL.
5.9 dryer. silica gel desiccant.
5.10 beaker. 500mL.
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