EN ISO 11357-7:2022 PDF

Name: EN ISO 11357-7:2022 — Plastics - Differential scanning calorimetry (DSC) - Part 7: Determination of crystallization kinetics (ISO 11357-7:2022)
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Plastics - Differential scanning calorimetry (DSC) - Part 7: Determination of crystallization kinetics (ISO 11357-7:2022)

Название (английский):

EN ISO 11357-7:2022

Plastics - Differential scanning calorimetry (DSC) - Part 7: Determination of crystallization kinetics (ISO 11357-7:2022)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 30 марта 2022 г.
Издание:: CEN EN 11357 edition 2 version 1
ICS:: 83.080.01

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Описание (английский):

This document specifies two methods (isothermal and non-isothermal) for studying the crystallization kinetics of partially crystalline polymers using differential scanning calorimetry (DSC). It is only applicable to molten polymers. NOTE These methods are not suitable if the molecular structure of the polymer is modified during the test.

Abstract

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Стандарты, упомянутые в описании

Overview

EN ISO 11357-7:2022 - Plastics - Differential scanning calorimetry (DSC) - Part 7: Determination of crystallization kinetics - specifies laboratory methods for studying the crystallization behaviour of partially crystalline plastics using differential scanning calorimetry (DSC). The standard covers two complementary approaches: isothermal and non‑isothermal crystallization measurements. It applies only to molten polymers and is not suitable where the polymer’s molecular structure changes during the test.

Key topics and technical requirements

Two measurement modes:

Isothermal crystallization procedures for kinetics at fixed temperature.
Non‑isothermal crystallization procedures for cooling/rate‑dependent kinetics.

Apparatus and materials: DSC instrument, crucibles and balance specified as per ISO 11357‑1; verify crucible material does not alter crystallization kinetics.

Specimen preparation and mass control: Test specimens and conditioning follow ISO 11357‑1; for comparative work maintain specimen mass within ±0.5 mg to avoid self‑heating artifacts.

Calibration and temperature control: Calibration in heating mode (per ISO 11357‑1) and checks for symmetry of the temperature scale between heating and cooling using suitable low‑undercooling substances.

Data treatment and results: Relative crystallinity is determined from partial enthalpy vs total enthalpy (ΔH) measured by DSC; the document defines methods for deriving crystallization rate parameters and includes formulae (Annex A) for kinetic analysis.

Procedure and reporting: Detailed steps for loading crucibles, melting protocol, measurement sequences, precision statements and required test report elements are provided.

Applications and who should use it

Polymer R&D and material characterization: Determine crystallization rates, nucleation and growth behaviour during formulation and processing development.

Process optimization and scale‑up: Inform cooling profiles and cycle times in extrusion, injection molding and film casting.

Quality control and comparative testing: Batch-to-batch monitoring of crystallization behaviour for semi‑crystalline polymers.

Thermal analysis laboratories and instrument manufacturers: Standardized test methods for DSC method validation, calibration and software algorithm development.

Regulatory and standards bodies: Reference method within the ISO/CEN framework for thermal property characterization.

Related standards

ISO 11357‑1 - DSC general principles (calibration, apparatus, specimen handling)

ISO 11357‑3 - Determination of melting/crystallization temperatures and enthalpies

ISO 472 - Plastics vocabulary

Keywords: EN ISO 11357‑7:2022, DSC, differential scanning calorimetry, crystallization kinetics, isothermal crystallization, non‑isothermal crystallization, plastics testing, polymer thermal analysis.

EN ISO 11357-7:2022 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who should use it

Related standards

Технические детали

ISO 11357-7:2022

Plastics — Differential scanning calorimetry (DSC) — Part 7: Determination of crystallization kinetics

BS EN ISO 11357-1:2023

Plastics. Differential scanning calorimetry (DSC). General principles.

SIST EN ISO 11357-3:2025

Plastics - Differential scanning calorimetry (DSC) - Part 3: Determination of temperature and enthalpy of mel…

ISO 472:2013/Amd 1:2018

Plastics — Vocabulary — Amendment 1: Additional items