British Standards Institution

Source:: ISO
Committee:: PRI/82 - Thermoplastic materials
Categories:: Thermoplastic materials
Comment period start date:: 16/05/2024
Comment period end date:: 09/07/2024
Number of comments:: 0

Comment by:

9th Jul

Scope

This document specifies a test method for the estimation of the short chain branching distribution of semicrystalline ethylene 1-olefin copolymers by successive self-nucleation and annealing (SSA) with conventional, high performance and fast differential scanning calorimetry.

This document is applicable to the estimation of the short chain branching distribution of raw materials of semicrystalline ethylene 1-olefin copolymers and its products. It is also applicable to ethylene-propylene copolymers.

SSA establishes a method for the estimation of the chemical composition distribution excluding amorphous highly branched components that do not crystallize up to the minimum crystallization temperature selected for experiments.

Quantitative calculation of short chain branching content, degree of crystallinity and short chain branching distribution is applicable to ethylene/1-butene copolymers, ethylene/1- hexene copolymers and ethylene/1- octene copolymers.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

02/08/2023

3. Public Comments

Public Comments start date:

16/05/2024

Public Comments end date:

09/07/2024

Learn more about the standards development process

Standards Development

BS ISO 18177 ISO 18177 Plastics. Test method for estimation of the short chain branching distribution of semicrystalline ethylene 1-olefin copolymers by differential scanning calorimetry (DSC)

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