ISO 15825:2017 PDF

Name: ISO 15825:2017 — Rubber compounding ingredients — Carbon black — Determination of aggregate size distribution by disc centrifuge photosedimentometry
SKU: ISO 15825:2017
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Rubber compounding ingredients — Carbon black — Determination of aggregate size distribution by disc centrifuge photosedimentometry

Название (английский):

ISO 15825:2017

Rubber compounding ingredients — Carbon black — Determination of aggregate size distribution by disc centrifuge photosedimentometry

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 6 марта 2017 г.
Издание:: ISO IS 15825 edition 3 version 1
ICS:: 83.040.20

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Описание (английский):

ISO 15825:2017 specifies a method for determining the size distribution of carbon black aggregates, using a disc centrifuge photosedimentometer. This technique is based on the hydrodynamic behaviour of carbon black in a centrifugal field. The determination of the aggregate size distribution is important in the evaluation of carbon black used in the rubber industry.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 15825:2017 specifies a laboratory method for determining the aggregate size distribution of carbon black used as a rubber compounding ingredient. The technique uses a disc centrifuge photosedimentometer (DCP) and is based on the hydrodynamic behaviour of carbon black aggregates in a centrifugal field. Continuous turbidity measurement during centrifugation produces a mass-differential distribution that, after a light-scattering (Mie) correction, yields Stokes-equivalent diameters and distribution statistics useful for quality control and product evaluation.

Key topics and requirements

Measurement principle: Sedimentation under centrifugal force with optical turbidity detection; results expressed as Stokes diameter (nm).

Apparatus: Disc centrifuge photosedimentometer (typical speed range noted up to ~11 000 rpm), stable temperature control, stroboscope and turbidity detector; probe-type sonicator and energy meter for dispersion.

Sample preparation: Typical test mass 20 mg dispersed in ~20 cm3 dispersion fluid (approximately 80% water/20% ethanol with non‑ionic surfactant) and sonicated under calibrated energy to break agglomerates into aggregates.

Spin and dispersion fluids: Spin fluid = water with surfactant, adjusted to pH ~9–10; dispersion fluid composition and handling specified to minimise re-agglomeration.

Calibration and dispersion control: Use of standard reference carbons (ITRB or ITRB‑2) and a defined sonication energy (example: 0.005 kWh ≈ 18 kJ) to ensure reproducible aggregate dispersion.

Data and reporting: Software parameters include fluid temperature, disc speed and light-scattering correction. Reported metrics include mean, median (d50), mode, quartiles, quartile ratio (d75/d25) and ΔD‑50 (FWHM).

Quality considerations: Warm-up, clean ventilation, and control of thermal gradients; periodic verification of instrument performance and precision (Annex B).

Applications and users

Rubber and tire manufacturers for raw material evaluation and batch-to-batch consistency of reinforcing and semi‑reinforcing carbon blacks.

Carbon black producers and suppliers to characterise product aggregate size distribution for specifications and quality control.

Laboratories and R&D teams performing particle size analysis, process optimisation, and comparative studies of dispersion performance.

Practical uses include optimizing rubber compound properties (reinforcement, hysteresis, wear) and ensuring consistent processing behavior.

Related standards

ISO 1124 - Carbon black shipment sampling procedures

ISO 3696 - Water for analytical laboratory use (reagents)

ISO/TC 45 - Technical committee on rubber and rubber products

ISO 15825:2017 (disc centrifuge photosedimentometry) is a targeted, reproducible method for particle-size characterisation of carbon black aggregates, essential for quality control across rubber compounding and carbon black production.

ISO 15825:2017 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

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