ISO 4577:2019 PDF
Plastics — Polypropylene and propylene-copolymers — Determination of thermal oxidative stability in air — Oven method
Plastics — Polypropylene and propylene-copolymers — Determination of thermal oxidative stability in air — Oven method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 7
- Дата публикации:
- 17 июля 2019 г.
- Издание:
- ISO IS 4577 edition 2 version 1
- ICS:
- 83.080.20
This document specifies a method for the determination of the resistance of moulded test specimens of polypropylene and propylene-copolymers to accelerated ageing by heat in the presence of air using a forced draught oven. The method represents an attempt to estimate the service life of parts fabricated from propylene plastics. The stability determined by this method is not directly related to the suitability of the material for use when different environmental conditions prevail. NOTE The specified thermal levels are considered sufficiently severe to cause failure of commercial grades of heat-stable propylene plastics within a reasonable period of time. If desired, lower temperatures can be applied to estimate the performance of propylene plastics with lower heat stabilities.
Abstract
Overview
ISO 4577:2019 specifies an oven method to determine the thermal oxidative stability of polypropylene and propylene-copolymers. The standard describes an accelerated ageing test performed in a forced‑draught oven in air to estimate the resistance of moulded specimens to heat‑induced oxidation and to provide an indication of service life under severe thermal conditions.
Key topics and technical requirements
- Test principle: Accelerated ageing by heat in the presence of air; visual inspection to determine time to failure (localized crazing, crumbling and/or discoloration).
- Recommended test temperature: 150 °C (±1 °C at a single location; ±1.5 °C throughout the oven). If time to failure
Технические детали
- Технический комитет
- ISO/TC 61/SC 9 - Thermoplastic materials
- SKU
- ISO 4577:2019
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