EN ISO 9702:1998 PDF

Name: EN ISO 9702:1998 — Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content (ISO 9702:1996)
SKU: EN ISO 9702:1998
Price: 51.9 EUR
Availability: InStock

Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content (ISO 9702:1996)

Название (английский):

EN ISO 9702:1998

Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content (ISO 9702:1996)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 19 августа 1998 г.
Издание:: CEN EN 9702 edition 1 version 1
ICS:: 83.080.10

Тип поставки:

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Язык документа:

ruen

Срок поставки:2 раб. дн. (перевод)

Цена:150 €

Описание (английский):

Specifies a method for the determination of the primary, secondary and tertiary amine group nitrogen content of aliphatic or aromatic amine hardeners for epoxy resins.

Abstract

Overview

Key Topics

Scope and Purpose Defines a potentiometric titration method that accurately measures the nitrogen content in distinct amine groups (primary, secondary, tertiary) in amine epoxide hardeners for epoxy resins.
Methodology
- Total amine group nitrogen content is determined by titration against hydrobromic or perchloric acid in glacial acetic acid.
- Primary amine groups react with acetylacetone to form imines, excess acetylacetone is then quantified by titration.
- Secondary and tertiary amine groups are converted to amide groups using acetic anhydride allowing specific titration steps.
- Separate calculations determine individual nitrogen contents for primary, secondary, and tertiary amine groups based on titration results and stoichiometric relations.
Reagents and Apparatus The procedure requires high-purity reagents such as glacial acetic acid, acetic anhydride, hydrobromic acid, and potassium hydroxide solutions. Analytical-grade solvents and specialized titration apparatus with potentiometric electrodes are employed to ensure precise measurements.
Types of Amines Covered
- Aliphatic amines
- Aromatic amines (including specific treatment for weakly and strongly basic amines)
Calculation and Expression of Results Amine nitrogen contents are expressed as percentage nitrogen by mass, using detailed formulae based on titration volumes, reagent concentrations, and sample mass.

Applications

Quality Control for Epoxy Hardeners Accurate determination of amine nitrogen content helps manufacturers and formulators validate the chemical composition and curing potential of amine hardener products.
Material Characterization in Plastics Industry Enables consistency and compliance monitoring in thermosetting materials involving epoxy systems.
Research and Development Supports development of new epoxy formulations by precisely quantifying active amine groups, influencing curing kinetics and final material properties.
Regulatory Compliance Facilitates adherence to international quality standards and certification requirements concerning epoxy resin hardening agents.

Related Standards

ISO 1618 – Plastics - Determination of epoxide content of epoxy resins
ISO/TC 61 – Technical Committee for plastics standardization, focusing on thermosetting materials
EN ISO 11357 – Plastics - Differential scanning calorimetry (DSC), often used in conjunction with chemical analysis to assess curing behavior
ASTM D2074 – Standard practice for epoxy resin content in composites (complementary to nitrogen content analysis)

Keywords: EN ISO 9702, amine epoxide hardeners, primary amine nitrogen content, secondary amine nitrogen, tertiary amine nitrogen, potentiometric titration, epoxy resins, nitrogen determination, aliphatic amines, aromatic amines, epoxy curing agents, plastics standard, thermosetting materials quality control.

Технические детали

Технический комитет: CEN/TC 249 - Plastics
SKU: EN ISO 9702:1998

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EN ISO 9702:1998 PDF

Abstract

Overview

Похожие стандарты

Key Topics

Applications

Related Standards

Технические детали

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