ISO 3451-3:1984

Name: ISO 3451-3:1984 — Plastics — Determination of ash — Part 3: Unplasticized cellulose acetate
SKU: ISO 3451-3:1984
Price: 25 EUR
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Plastics — Determination of ash — Part 3: Unplasticized cellulose acetate

Название (английский):

ISO 3451-3:1984

Plastics — Determination of ash — Part 3: Unplasticized cellulose acetate

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 2
Дата публикации:: 1 мая 1984 г.
Издание:: ISO IS 3451 edition 1 version 1
ICS:: 83.080.20

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Описание (английский):

Specifies a method for the determination of the ash unplasticized cellulose acetate, free of additives, fillers, dyes or other materials, which may affect the result. -Ignition of a test portion and calcination in a muffle furnace maintained at 575 C or 850 C (as agreed). Higher temperatures such as 850 C will convert carbonates to the oxides and thus give lower values. The general instructions in ISO 3451/1 shall be followed.

Abstract

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Упомянутые в описании и другие стандарты ISO

Overview

ISO 3451-3:1984 is an international standard developed by the International Organization for Standardization (ISO) specifying a method for the determination of ash content in unplasticized cellulose acetate. This standard is crucial for assessing the inorganic residue remaining after combustion of cellulose acetate that is free from additives, fillers, dyes, or other interfering materials. The method involves ignition and calcination in a muffle furnace at specified temperatures, providing accurate and repeatable ash measurement results.

This standard provides manufacturers, quality control laboratories, and research institutions with a reliable procedure to quantify ash content, which is important for evaluating material purity and properties relevant in plastics and cellulose acetate industries.

Key Topics

Scope and Applicability Applicable exclusively to unplasticized cellulose acetate free from additives or contaminants that may affect ash content. If additives are present, they must be removed by an agreed procedure prior to testing.

Test Principle The method involves ignition of a sample followed by calcination in a muffle furnace at controlled temperatures (575 °C ± 25 °C or optionally 850 °C ± 50 °C). Calcination converts the organic components to ash, which is then weighed.

Temperature Selection Lower temperatures (~575 °C) allow for accurate determination of mineral salts and foreign mineral matter in cellulose acetate. Higher temperatures (~850 °C) convert carbonates to oxides, resulting in lower ash values.

Test Equipment

Crucibles (silicon, platinum, or porcelain)
Bunsen burner or equivalent heating device
Muffle furnace with temperature regulation
Analytical balance with precision of 0.1 mg
Desiccator with drying agent (e.g., anhydrous calcium chloride)

Detailed Procedure Gradual burning of the test portion on a heating device, followed by calcination in the muffle furnace for 30 minutes. The crucible is cooled, weighed, and repeatedly calcined until consistent weight is achieved, ensuring accurate ash measurement.

Result Calculation Ash content is expressed as grams of ash per 100 grams of dry unplasticized cellulose acetate, adjusted for moisture content determined according to ISO 585.

Repeatability and Reporting Two determinations should be performed; results differing by more than 10% require retesting. Reports must include sample identification, test temperature, treatment details, and individual as well as average results.

Applications

Quality Control in Plastics Manufacturing Ensures raw cellulose acetate materials meet purity specifications by quantifying residual inorganic ash.

Research and Development Supports formulation development by verifying the absence of fillers, dyes, or additives that could skew physical properties.

Regulatory Compliance Provides a standardized method for verifying the composition of cellulose acetate products in line with international quality standards.

Material Certification Facilitates certification processes requiring precise determination of ash content for unplasticized cellulose acetate used in various industrial applications.

Related Standards

ISO 585: Plastics - Unplasticized cellulose acetate - Determination of moisture content Used to determine moisture content for accurate dry weight calculation in ash content results.

ISO 3451-1: Plastics - Determination of ash - Part 1: General methods Provides general instructions and methodologies applicable to ash content determination applicable to plastics, complementing ISO 3451-3.

By following ISO 3451-3:1984, industries involved with cellulose acetate can ensure accurate ash content measurements, leading to better material characterization, enhanced product quality, and compliance with globally recognized international standards.

ISO 3451-3:1984

Abstract

Похожие стандарты

Overview

Key Topics

Applications

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