EN 6041:2018

Aerospace series - Non-metallic materials - Test method - Analysis of non-metallic materials (uncured) by Differential Scanning Calorimetry (DSC)

This test method defines the procedure for the determination of the curing-characteristic and glass transition temperature of non-metallic materials (e.g. preimpregnated and neat resin systems, adhesives) for aerospace use by Differential Scanning Calorimetry (DSC).
The results obtained by this method may be useful for:
-   derivation of the optimum cure cycle (only together with other test methods e.g. Tg determination)
-   assessment of the condition of the resin
-   assessment of the ageing behavior of the resin
This European Standard does not give any directions necessary to meet the health and safety requirements. It is the responsibility of the user of this European Standard to adopt appropriate health and safety precautions.

Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Prüfverfahren - Analyse von nichtmetallischen Werkstoffen (ungehärtet) mittels dynamischer Differenzkalorimetrie (DSC)

Dieses Prüfverfahren legt eine Methode zur Bestimmung der Härtungscharakteristik und der Glasübergangs¬temperatur von nichtmetallischen Werkstoffen (z. B. Prepreg- und Reinharz-Systeme, Klebstoffe) für die Luft- und Raumfahrt mittels der dynamischen Differenzkalorimetrie (en: Differential Scanning Calorimeter, DSC) fest.
Die anhand dieses Verfahrens erzielten Ergebnisse dürfen herangezogen werden für:
-   Ableitung des optimalen Härtungszyklus (nur im Zusammenhang mit anderen Verfahren, z. B. Tg Bestimmung);
-   Bestimmung des Harzzustandes;
-   Beurteilung des Harz-Auslagerungsverhaltens.
Diese Europäische Norm enthält keine Anweisungen in Bezug auf die einzuhaltenden Gesundheits- und Sicherheitsanforderungen. Es ist die Verantwortung des Anwenders dieser Europäischen Norm, die jeweils erforderlichen Gesundheits- und Sicherheitsvorkehrungen zu treffen.

Série aérospatiale - Matériaux non métalliques - Méthode d'essai - Analyse Enthalpique Différentielle (AED) des matériaux non métalliques (non polymérisés)

La présente méthode d’essai définit la procédure pour la détermination des caractéristiques de polymérisation et de la température de transition vitreuse des matériaux non métalliques (par exemple : préimprégné et systèmes de résines pures, adhésifs) pour utilisation aérospatiale par Analyse Enthalpique Différentielle (AED).
Les résultats obtenus par cette méthode peuvent être utiles pour :
-   dérivation du cycle de polymérisation optimal (uniquement associée à d’autres méthodes d’essai, par exemple : détermination Tg)
-   évaluation de l’état de la résine
-   évaluation du comportement en vieillissement de la résine
La présente norme ne fournit aucune consigne nécessaire à la satisfaction des exigences de santé et de sécurité. La responsabilité d’adopter les précautions d’hygiène et de sécurité appropriées incombe à l’utilisateur de la présente norme.

Aeronavtika - Nekovinski materiali - Preskusna metoda - Analiza nekovinskih materialov (neobdelanih) z diferenčno dinamično kalorimetrijo (DSC)

General Information

• Status: Published
• Publication Date: 16-Jan-2018
• Withdrawal Date: 30-Jul-2018
• ICS: 49.025.01 - Materials for aerospace construction in general
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4/S 5 - Test Methods
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 17-Jan-2018
• Completion Date: 17-Jan-2018
• Ref Project: SIST EN 6041:2018 - Aerospace series - Non-metallic materials - Test method - Analysis of non-metallic materials (uncured) by Differential Scanning Calorimetry (DSC)

Overview

EN 6041:2018 - Aerospace series: Analysis of non‑metallic materials (uncured) by Differential Scanning Calorimetry (DSC) - is a CEN standard that defines a laboratory test method to determine the curing‑characteristic and glass transition temperature (Tg) of uncured non‑metallic aerospace materials (for example, prepregs, neat resin systems and adhesives) using Differential Scanning Calorimetry (DSC). The standard describes apparatus, specimen preparation, conditioning, test procedure, calibration and result reporting. It does not cover health and safety requirements.

Key Topics

• Scope and purpose: Measurement of curing behaviour and Tg for aerospace non‑metallic materials to support process development and quality assessment.
• Apparatus & calibration:
  • Use of a DSC capable of the specified test limits; calibration with pure indium to maintain temperature accuracy to ±0.5 °C and calorimetric precision within 1 %.
  • Recommended purge gas: dry nitrogen (≥99.99 %), typical flow 20–30 ml/min.
  • Balance accuracy: 0.01 mg.
• Specimen requirements:
  • Sample mass equivalent to ~7–10 mg neat resin (e.g., ~20 mg prepreg); mass measured to 0.01 mg.
  • Correction of reaction enthalpy (ΔH) to 100 % resin content when required.
• Test parameters:
  • Standard heating rate: 10 °C/min (additional rates 5 °C/min and 20 °C/min for qualification).
  • Test start: ~40 °C below expected Tg; test end: after region of interest.
  • Pans: non‑hermetic crimped lids to avoid pressure build‑up.
• Conditioning & environment:
  • Standard atmosphere: (23 ± 2) °C and (50 ± 5) % RH (EN 2743 B conditions).
  • Test to be performed within 6 hours after conditioning unless specified otherwise.
• Results & reporting:
  • Determine Tg (onset/end/derivative methods) and cure exotherm parameters (onset, peak, ΔH).
  • Quantitative repeatability targets: peaks within ±2 °C, ΔH within ±5 % of mean.
  • Test report must include material ID, specimen prep, mass/resin content, test parameters and individual results.

Applications

EN 6041:2018 is used by:

• Materials and process engineers to develop and derive optimum cure cycles (in conjunction with other tests).
• Quality control and testing laboratories for release testing, batch verification and condition assessment of resins and prepregs.
• R&D teams studying ageing behaviour and storage condition effects on uncured resin systems.
• Aerospace OEMs and composite manufacturers implementing traceable DSC-based test protocols.

Keywords: EN 6041:2018, Differential Scanning Calorimetry, DSC, glass transition temperature, curing-characteristic, prepreg testing, aerospace non-metallic materials, resin condition assessment.

Related Standards

• EN 2331 - Glass fibre prepreg resin/fibre content test methods
• EN 2559 - Carbon (and aramid) fibre prepreg resin/fibre content determination
• EN 2743 - Conditioning procedures for unaged materials

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2018
$HURQDYWLND1HNRYLQVNLPDWHULDOL3UHVNXVQDPHWRGD$QDOL]DQHNRYLQVNLK
PDWHULDORYQHREGHODQLK]GLIHUHQþQRGLQDPLþQRNDORULPHWULMR'6&
Aerospace series - Non-metallic materials - Test method - Analysis of non-metallic
materials (uncured) by Differential Scanning Calorimetry (DSC)
Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Prüfverfahren - Analyse von
nichtmetallischen Werkstoffen (unpolimerisiert) mittels dynamischer Differenzkalorimetrie
(DSC)
Série aérospatiale - Matériaux non métalliques - Méthode d'essai - Analyse Enthalpique
Différentielle (AED) des matériaux non métalliques (non polymérisés)
Ta slovenski standard je istoveten z: EN 6041:2018
ICS:
49.025.01 Materiali za letalsko in Materials for aerospace
vesoljsko gradnjo na splošno construction in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 6041
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2018
EUROPÄISCHE NORM
ICS 49.025.01
English Version
Aerospace series - Non-metallic materials - Test method -
Analysis of non-metallic materials (uncured) by
Differential Scanning Calorimetry (DSC)
Série aérospatiale - Matériaux non métalliques - Luft- und Raumfahrt - Nichtmetallische Werkstoffe -
Méthode d'essai - Analyse Enthalpique Différentielle Prüfverfahren - Analyse von nichtmetallischen
(AED) des matériaux non métalliques (non Werkstoffen (ungehärtet) mittels dynamischer
polymérisés) Differenzkalorimetrie (DSC)
This European Standard was approved by CEN on 28 August 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6041:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Symbols and definitions . 4
4 Principle of the method . 5
5 Designation of the method . 5
6 Apparatus. 5
7 Test specimens . 6
8 Procedure . 8
9 Presentation of the results . 8
10 Test report . 8
Annex A (informative) Equipment . 13
A.1 Mettler TA 3000/TA 2100 - DSC 20/DSC 30 . 13
A.2 DuPont 9900 . 13
A.3 Perkin Elmer DSC 2/DSC 4/DSC 7 . 13

European foreword
This document (EN 6041:2018) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by July 2018, and conflicting national standards shall be
withdrawn at the latest by July 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This test method defines the procedure for the determination of the curing-characteristic and glass
transition temperature of non-metallic materials (e.g. preimpregnated and neat resin systems,
adhesives) for aerospace use by Differential Scanning Calorimetry (DSC).
The results obtained by this method may be useful for:
 derivation of the optimum cure cycle (only together with other test methods e.g. Tg determination)
 assessment of the condition of the resin
 assessment of the ageing behavior of the resin
This European Standard does not give any directions necessary to meet the health and safety
requirements. It is the responsibility of the user of this European Standard to adopt appropriate health
and safety precautions.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 2331, Aerospace series — Textile glass fibre preimpregnates — Test methods for the determination of
the resin and fibre content and mass of fibre per unit area
EN 2559, Aerospace series — Carbon fibre preimpregnates — Determination of the resin and fibre content
and the mass of fibre per unit area
EN 2743, Aerospace series — Fibre reinforced plastics — Standard procedures for conditioning prior to
testing unaged materials
3 Symbols and definitions
For the purposes of this document, the following symbols and definitions apply.
The determination of these parameters shall be agreed upon between manufacturer and purchaser in
case of non-ideal curves or different instrument types.
3.1
curing reaction (see Figure 3)
θ is the heating rate, in °C /min or °K /min;
T is the onset temperature, in °C or °K;
os
T is the peak maximum temperature, in °C or °K;
p
∆H is the reaction enthalpy, in J/g;
∆H is the reaction enthalpy corrected to 100 % resin content, in J/g.
3.2
calibration (see 6.5)
T is the melting temperature, in °C or °K;
m
∆H is the enthalpy of fusion, in J/g.
m
3.3
glass transition (see Figure 2)
Tg is the onset temperature of transition, in °C or °K;
os
Tg is the end temperature of transition, in degrees °C or °K;
e
Tg is the glass transition temperature, in degrees °C or °K.
4 Principle of the method
Differential Scanning Calorimetry (DSC) measures the temperatures and the heat flow associated with
transitions in materials as a function of time and temperature.
5 Designation of the method
The designation of the method used shall be drawn up according to the following example:
Description block Identity block

ANALYSIS OF NON-METALLIC
MATERIALS (UNCURED
...