GB/T 18013-2008Raw natural rubber - Determination of accelerated storage-hardening number (English PDF)
天然生胶 加速贮存硬化值的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 15, 2008
Implementation date
November 1, 2008
Scope
GB/T 18013-2008 is the English-translated version of 天然生胶 加速贮存硬化值的测定.
GB/T 18013-2008 is the Chinese standard "Raw natural rubber - Determination of accelerated storage-hardening number". Its scope clause reads: 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. Its clauses include quick plastimeter method.
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Document preview — GB/T 18013-2008
National Standard of the People's Republic of China
- ICS
- 83.060
- Classification
- B 72
- Replacing
- GB/T 18013-1999
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Quick plastimeter method
- 3.1 Principle
- 3.2 Instruments and materials
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 °C ± 1 °C 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 (deltaP) 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 °C, said bottles filled within 10min after should be able to return to a predetermined temperature
Degree within ± 1 °C.
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.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 18013
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 18013-2008 | Raw natural rubber - Determination of accelerated storage-hardening number | current edition | Current |
| GB/T 18013-1999 | Raw natural rubber - Determination of accelerated storage-hardening number | previous edition | Superseded |
This page sells the current edition, GB/T 18013-2008. Earlier editions are listed for reference only.
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