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GB/T 18013-2008: Raw natural rubber -- Determination of accelerated storage-hardening number
Status: Valid GB/T 18013: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18013-2008 | English | 189 |
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Raw natural rubber -- Determination of accelerated storage-hardening number
| Valid |
GB/T 18013-2008
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| GB/T 18013-1999 | English | 239 |
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Raw natural rubber--Determination of accelerated storage--hardening number
| Obsolete |
GB/T 18013-1999
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PDF similar to GB/T 18013-2008
Basic data | Standard ID | GB/T 18013-2008 (GB/T18013-2008) | | Description (Translated English) | Raw natural rubber -- Determination of accelerated storage-hardening number | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B72 | | Classification of International Standard | 83.060 | | Word Count Estimation | 8,826 | | Date of Issue | 2008-05-15 | | Date of Implementation | 2008-11-01 | | Older Standard (superseded by this standard) | GB/T 18013-1999 | | Quoted Standard | GB/T 1232.1; GB/T 3510; GB/T 15340 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.8 (Total No.121) | | 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 method to use and fast Plastometer Mooney viscometer accelerated storage hardening of natural rubber values ??. This standard applies to the evaluation with constant viscosity characteristics of natural rubber Variety Performance. Note: accelerated storage hardening measured values ??. Discovery can be a solid natural rubber during storage, due to increase in viscosity leaving intermolecular crosslinking degree. Such cross -linking is formed, mainly due to the condensation reaction of some natural rubber molecule in the presence of aldehyde facilitated. | GB/T 18013-2008: Raw natural rubber -- Determination of accelerated storage-hardening number---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.
Raw natural rubber.Determination of accelerated storage-hardening number
ICS 83.060
B72
National Standards of People's Republic of China
Replacing GB/T 18013-1999
Raw natural rubber accelerated storage hardening measured values
Posted 2008-05-15
2008-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 18013-1999 "Determination of natural rubber accelerated storage hardening value."
The main difference compared with the standard GB/T 18013-1999 as follows.
--- Adds a second law. Mooney viscometer method;
--- This standard made editorial changes.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee rubber products natural rubber and rubber Technical Committee.
This standard was drafted. Chinese Tropical Institute of Agro Agricultural Sciences.
The main drafters of this standard. Chen Chenghai, COOKING use, Huang Maofang.
This standard was first released in November 1999.
Raw natural rubber accelerated storage hardening measured values
Warning. Use of this standard shall have a person experiences regular laboratory work. This standard does not point out all possible security issues.
Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
This standard specifies the method by flash meter and plastic Mooney viscometer natural rubber accelerated storage hardening values.
This standard applies to the evaluation of the properties has a constant viscosity natural rubber variety performance.
NOTE. accelerated storage hardening value determination can ascertain solid natural rubber during storage, due to intermolecular crosslinking leaving the viscosity increase of the degree. Such cross-linked form
Into, mainly due to the condensation reaction of certain naturally occurring rubber molecules are aldehyde facilitated.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 1232.1 unvulcanized rubber circle shear viscosity meter were measured - Part 1. Determination of Mooney viscosity
(GB/T 1232.1-2000, idt ISO 289.1.1994)
GB/T 3510 Determination of uncured plastic plastic quick count method (GB/T 3510-2006, ISO 2007.1991, IDT)
GB/T 15340 natural, synthetic rubber raw sampling and sample preparation method (GB/T 15340-1994, idt ISO 1795.1992)
3 Quick plastimeter method
3.1 Principle
The sample was placed on phosphorus pentoxide as desiccant container, at atmospheric pressure and a temperature of 60 ℃ ± 1 ℃ storage 24h ± 0.1h; the
After hardening accelerated storage sample and the determination of accelerated storage without fast hardening plastic sample values, the difference between (ΔΡ) called Acceleration
Storage hardening value.
3.2 Instruments and materials
3.2.1 Rapid plastimeter, with a diameter of 10.0mm on the platen.
3.2.2 slicer, shall comply with the provisions of GB/T 3510's.
3.2.3 Laboratory open-roll, roll diameter (OD) of 150mm ~ 155mm, roll length (two tranches of plates) was 250mm ~
280mm, front roller speed is 24r/min ± 1r/min, front roller and rear roller is 1.0.1.4 ratio.
3.2.4 electric oven, the temperature difference between the entire available space within ± 1 ℃, said bottles filled within 10min after should be able to return to a predetermined temperature
Degree within ± 1 ℃.
3.2.5 thickness gauge, having a value of 0.01mm indexing dial indicator probe contact plane diameter 4mm, operating pressure of 22kPa ±
5kPa.
3.2.6 said bottle, using the dimensions shown in Figure 1 and structure.
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