EN 6064:2017

Aerospace series - Analysis of non-metallic materials (cured) for the determination of the extent of cure by Differential Scanning Calorimetry (DSC)

This test method defines the procedure for the estimation of the extent of cure of certain non-metallic materials (e.g. preimpregnated and neat resin systems, adhesives) for aerospace use. The extent of cure is estimated by Differential Scanning Calorimetry (DSC) measurements of uncured (reference) and cured materials. Additional evidence on the extent of cure may be gained by combining results from this method with those obtained by other techniques.
This standard does not give any directions necessary to meet the health and safety requirements. It is the responsibility of the user of this standard to adopt appropriate health and safety precautions.

Luft- und Raumfahrt - Analyse von nichtmetallischen Werkstoffen (gehärtet) zur Bestimmung des Vernetzungsgrades durch dynamische Differenzkalorimetrie (DSC)

Série aérospatiale - Analyse Enthalpique Différentielle (AED) des matériaux non métalliques (polymérisés) pour la détermination du degré de polymérisation

Aeronavtika - Analiza nekovinskih materialov (obdelanih) za določanje obsega obdelave z diferenčno dinamično kalorimetrijo (DSC)

General Information

• Status: Published
• Publication Date: 19-Dec-2017
• Withdrawal Date: 29-Jun-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: 20-Dec-2017
• Completion Date: 20-Dec-2017
• Ref Project: SIST EN 6064:2018 - Aerospace series - Analysis of non-metallic materials (cured) for the determination of the extent of cure by Differential Scanning Calorimetry (DSC)

Overview

EN 6064:2017 - Aerospace series - specifies a standard test method to estimate the extent of cure of cured non‑metallic materials (for example, prepregs, neat resin systems and adhesives) used in aerospace by Differential Scanning Calorimetry (DSC). The method compares DSC exotherm measurements of uncured (reference, A‑curve) and cured (B‑curve) materials to calculate the degree of cure. The standard defines specimen preparation, instrument requirements, calibration, test procedure, result presentation and reporting. Note: health and safety precautions are the user’s responsibility.

Key topics and technical requirements

• Scope and purpose: Quantitative estimation of extent of cure for aerospace non‑metallics using DSC; results may be combined with other techniques for additional evidence.
• Apparatus: Laboratory DSC capable of specified temperature control; balance with 0.01 mg accuracy; inert purge gas (dry N2, ≥99.99%); sample pans and cutters. Examples of instruments are listed in Annex A.
• Specimen size & preparation: Typical sample mass ≈ 7–10 mg neat resin (≈20 mg prepreg). Resin content corrections required for quantitative ∆H values.
• Conditioning: Standard atmosphere per EN 2743 (23 ± 2 °C, 50 ± 5 % RH); condition samples for minimum 2 h and test within 6 h unless otherwise specified.
• Calibration & performance: Calibrate temperature with indium (temperature accuracy ±0.5 °C) and maintain calorimetric precision within 1 %. Baseline drift for empty pans or inert fills should not exceed 1.0 mW over −50 °C to 300 °C.
• Test parameters: Typical heating rate 10 °C/min; nitrogen purge recommended 20–30 ml/min; reference pan empty or inert material.
• Extent of cure calculation: α = (∆HA − ∆HB) / ∆HA × 100 [%], with corrected values (∆H(100)) used when adjusting to 100 % resin content.
• Reporting: Full material ID, specimen prep and conditioning, specimen mass and resin content method, equipment and parameters, individual ∆H and α results, and any deviations.

Applications and users

• Who uses EN 6064:2017: Aerospace materials engineers, composite manufacturers, adhesive formulators, quality control and test laboratories, procurement and certification bodies.
• Practical uses:
  • Release testing of cured composite laminates and bonded assemblies.
  • Process validation and cure cycle optimization for prepregs and adhesives.
  • Qualification testing during material acceptance and supplier audits.
  • Providing traceable cure metrics for design, manufacturing and maintenance records.

Related standards

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

Keywords: EN 6064:2017, differential scanning calorimetry, DSC, extent of cure, aerospace, prepreg, resin systems, adhesives, cure measurement, composite testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2018
$HURQDYWLND$QDOL]DQHNRYLQVNLKPDWHULDORYREGHODQLK]DGRORþDQMHREVHJD
REGHODYH]GLIHUHQþQRGLQDPLþQRNDORULPHWULMR'6&
Aerospace series - Analysis of non-metallic materials (cured) for the determination of the
extent of cure by Differential Scanning Calorimetry (DSC)
Luft- und Raumfahrt - Analyse von nichtmetallischen Werkstoffen (gehärtet) zur
Bestimmung des Vernetzungsgrades durch dynamische Differenzkalorimetrie (DSC)
Série aérospatiale - Analyse Enthalpique Différentielle (AED) des matériaux non
métalliques (polymérisés) pour la détermination du degré de polymérisation
Ta slovenski standard je istoveten z: EN 6064:2017
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 6064
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2017
EUROPÄISCHE NORM
ICS 49.025.01
English Version
Aerospace series - Analysis of non-metallic materials
(cured) for the determination of the extent of cure by
Differential Scanning Calorimetry (DSC)
Série aérospatiale - Analyse Enthalpique Différentielle Luft- und Raumfahrt - Analyse von nichtmetallischen
(AED) des matériaux non métalliques (polymérisés) Werkstoffen (gehärtet) zur Bestimmung des
pour la détermination du degré de polymérisation Vernetzungsgrades durch dynamische
Differenzkalorimetrie (DSC)
This European Standard was approved by CEN on 26 July 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6064:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Scope . 4
Normative references . 4
Symbols and definitions . 4
Principle of the method . 4
Designation of the method . 5
Apparatus. 5
Test specimens . 6
Procedure . 7
Presentation of the results . 8
Test report . 8
Annex A (informative) Equipment . 11
A.1 Mettler TA 3000/TA 2100 - DSC 20/DSC 30 . 11
A.2 DuPont 9900 . 11
A.3 Perkin Elmer DSC 2/DSC 4/DSC 7 . 11

European foreword
This document (EN 6064:2017) 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 June 2018 and conflicting national standards shall be
withdrawn at the latest by June 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Scope
This test method defines the procedure for the estimation of the extent of cure of certain non-metallic
materials (e.g. preimpregnated and neat resin systems, adhesives) for aerospace use. The extent of cure
is estimated by Differential Scanning Calorimetry (DSC) measurements of uncured (reference) and cured
materials. Additional evidence on the extent of cure may be gained by combining results from this method
with those obtained by other techniques.
This standard does not give any directions necessary to meet the health and safety requirements. It is the
responsibility of the user of this standard to adopt appropriate health and safety precautions.
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 method 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
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 1)
θ is the heating rate, in degrees Celsius or Kelvin by minutes;
∆H is the reaction enthalpy, in Joules by grams;
∆H is the reaction enthalpy corrected to 100 % resin content, in Joules by grams;
A-curve is the reference reaction curve for uncured material;
B-curve is the reaction curve for an already (semi-) cured sample.
3.2
calibration (see 6.6)
T is the melting temperature, in degrees Celsius or Kelvin
m
∆H is the enthalpy of fusion, in Joules by grams
m
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.
...