BS EN ISO 16014-5:2019
Plastics. Determination of average molecular weight and molecular weight distribution of polymers using size-exclusion chromatography. Light-scattering method

Standard No.

BS EN ISO 16014-5:2019

Release Date

2019

Published By

British Standards Institution (BSI)

Latest

BS EN ISO 16014-5:2019

Scope

What is ISO 16014-5 - Determination of average molecular weight with SEC-LS about? ISO 16014-5 is the fifth part of the multi-series ISO 16014. ISO 16014-5 specifies a general method for determining the average molecular weight and the molecular weight distribution of polymers using SEC-LS, i.e., size-exclusion chromatography coupled with light-scattering detection. The average molecular weight and the molecular weight distribution are calculated from molecular weight data and weight concentrations determined continuously with elution time. The molecular weight at each elution time is determined absolutely by combining a light-scattering detector with a concentration-sensitive detector. Therefore, SEC-LS is classified as an absolute method. ISO 16014-5 method applies to linear homopolymers and nonlinear homopolymers such as branched, star-shaped, comb-like, stereo-regular, and stereo-irregular polymers. It can also be applied to heterophasic copolymers whose molecular composition cannot vary. However, SEC-LS is not applicable to block, graft, or heterophasic copolymers whose molecular composition can vary. And the methods apply to molecular weights ranging from that of the monomer to 3 000 000 but are not intended for samples that contain > 30 % of components having a molecular weight < 1 000. Who is ISO 16014-5 - Determination of average molecular weight with SEC-LS for ? ISO 16014-5 on the determination of average molecular weight with SEC-LS is useful for: Manufacturers of polymers products such as grocery bags, soda and water bottles, textile fibers, phones, computers, food packaging, auto parts, and toys Plast...

BS EN ISO 16014-5:2019 history

• 2019 BS EN ISO 16014-5:2019 Plastics. Determination of average molecular weight and molecular weight distribution of polymers using size-exclusion chromatography. Light-scattering method
• 2012 BS EN ISO 16014-5:2012 Plastics. Determination of average molecular mass and molecular mass distribution of polymers using size-exclusion chromatography. Method using light-scattering detection