GB/T 12008.5-2010 PDF English
US$110.00 · In stock · Download in 9 secondsGB/T 12008.5-2010: Plastics -- Polyether polyols -- Part 5: Determination of acidity as acid number Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 12008.5: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 12008.5-2010 | English | 110 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Plastics -- Polyether polyols -- Part 5: Determination of acidity as acid number
| Valid |
| GB/T 12008.5-1989 | English | 199 |
Add to Cart
|
2 days
|
Polyether polyols--Determination of acid number
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 12008.5-2010
GB/T 12008.5-2010: Plastics -- Polyether polyols -- Part 5: Determination of acidity as acid number---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT12008.5-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.080.20
G 31
Replacing GB/T 12008.5-1989
Plastics - Polyether Polyols - Part 5.Determination of
Acidity as Acid Number
Issued on. SEPTEMBER 26, 2010
Implemented on. AUGUST 1, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Principle... 5
5 Importance and Application... 6
6 Interference... 6
7 Instruments... 6
8 Reagents and Materials... 6
9 Steps... 7
10 Calculation and Expression of Results... 7
11 Report... 8
12 Precision and Bias... 8
13 Test Report... 8
Appendix A (informative) Precision and Bias... 9
Foreword
GB/T 12008 Plastics - Polyether Polyols is divided into 7 parts.
---Part 1.Designation System;
---Part 2.Specification;
---Part 3.Determination of Hydroxyl Number;
---Part 4.Determination of Sodium and Potassium;
---Part 5.Determination of Acidity as Acid Number;
---Part 6.Determination of Degree of Unsaturation;
---Part 7.Determination of Viscosity.
This is Part 5 of GB/T 12008.It modifies and adopts ASTM D 7253-2006 Standard Test
Method for Polyurethane Raw Materials. Determination of Acidity as Acid Number for
Polyether Polyols.
In comparison with ASTM D 7253-2006, this Part mainly makes the following technical
modifications.
---Chapter 12 “Precision and Bias” of ASTM D 7253-2006 is taken as informative
appendix A;
---Key Words is deleted; Test Report is added.
For ease of use, this Standard also makes the following editorial modifications.
---The title of the standard is modified;
---Foreword of ASTM D 7253-2006 is deleted; Foreword of Chinese standard is
added;
---Chapter 2 “References” is modified into “Normative References”;
---Chapter 3 “Terms” is modified into “Terms and Definitions”.
This Part serves as a replacement of GB/T 12008.5-1989 Polyether Polyols -
Determination of Acid Number.
In comparison with GB/T 12008.5-1989, this Part has the following main changes.
---The title of the standard is modified;
---The standard titration solution is potassium hydroxide - methanol solution (5.1
of Edition 1989; 8.4 of this edition);
---The specimen is dissolved with isopropanol (7.2 of Edition 1989; 9.1 of this
edition).
Appendix A of this Part is informative.
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of Plastic Resin General Methods and Products
Subcommittee of National Technical Committee 15 on Plastic of Standardization
Administration of China (SAC/TC 15 / SC 4).
The responsible drafting organization of this Part. Jiangsu Chemical Research Institute
Co., Ltd.
The participating drafting organizations of this Part. Shanghai Gaoqiao Branch of
SINOPEC Group Asset Management Co., Ltd.; Tianjin Petrochemical Branch of
SINOPEC Group Asset Management Co., Ltd.; Jiangsu Zhongshan Chemical Co., Ltd.;
National Synthetic Resin Quality Supervision and Inspection Center.
The main drafters of this Part. Liu Rong, Zhou Qinnan, Chen Fengqiu, Qi Li, Du Xinlei,
Wang Jiandong.
The issuing of the previous edition.
---GB/T 12008.5-1989.
Plastics - Polyether Polyols - Part 5.Determination of
Acidity as Acid Number
1 Scope
1.1 The test method specified in this Part of GB/T 12008 is used to determine the acidic
components in polyether polyols, and the result is expressed in acid number. The
typical acid number (calculated by the amount of consumed KOH) ranges from 0 to 0.1
mg/g.
1.2 This Part does not involve any safety issues associated with the application. Before
use, the user is responsible for establishing appropriate safety and health measures
and determining the scope of application of management restrictions.
2 Normative References
The clauses of the following documents become clauses of this Part through the
reference in this Part of GB/T 12008.In terms of references with a specified date, all
subsequent amendments (excluding corrected content) or revisions are not applicable
to this Part. However, all parties that reach an agreement in accordance with this Part
are encouraged to explore the possibility of adopting the latest editions of these
documents. In terms of references without a specified date, the latest edition is
applicable to this Part.
ASTM D 883 Standard Terminology Relating to Plastics
3 Terms and Definitions
What is determined in ASTM D 883, and the following terms and definitions are
applicable to this Part.
4 Principle
The specimen is dissolved in isopropanol. Take phenolphthalein as an indicator. At
room temperature, use 0.02 mol/L potassium hydroxide - methanol standard titration
solution to titrate to the end point of the indicated color change (pink).
5 Importance and Application
The test method of this Part is applicable to the quality control of product inspection
and scientific research. The acid number indicates the degree of neutralization reaction
between the polyol and the acid.
6 Interference
Dark specimens may interfere with or hinder the application of this method.
7 Instruments
7.1 Burette. 10 mL, manual or automatic.
7.2 Measuring cylinder. 100 mL.
7.3 Balance. accurate to 0.1 mg.
8 Reagents and Materials
8.1 Reagent purity. potassium hydroxide is of top-grade purity; isopropanol and
methanol are of analytical purity.
8.2 Isopropanol.
8.3 Phenolphthalein indicator solution. 1 g of phenolphthalein is dissolved in 100 mL
of methanol.
9 Steps
9.1 Add (100 ± 20) mL of isopropanol (8.2) and 1 mL of phenolphthalein indicator
solution (8.3) to the conical flask (7.4).
9.2 Use 0.02 mol/L potassium hydroxide - methanol standard titration solution (8.4) to
titrate to light pink and maintain for 30 s.
9.3 Weigh-take 50 g ~ 60g of specimen in the above-mentioned conical flask. Record
the mass of the specimen, accurate to 0.1 g.
10 Calculation and Expression of Results
10.1 The acid number C of the specimen, which is calculated by the amount of
consumed KOH and expressed in (mg/g), shall be calculated in accordance with
Formula (1).
11 Report
The report result (calculated by the amount of consumed KOH) is accurate to 0.001
mg/g.
12 Precision and Bias
There is no relevant accuracy data for this Standard.
NOTE. please refer to Appendix A for the precision data of the advanced foreign standard
ASTM D 7253-2006 adopted in this Standard.
13 Test Report
The test report shall include the following contents.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 12008.5-2010 be delivered?Answer: The full copy PDF of English version of GB/T 12008.5-2010 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 12008.5-2010_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 12008.5-2010_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 12008.5-2010 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 12008.5-2010?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 12008.5-2010 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 12008.5-2010?A step-by-step guide to download PDF of GB/T 12008.5-2010_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 12008.5-2010".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |