Webinar: What is Chemical Composition in Polyolefins and why it should be part of your GPC Analysis

by Ph.D Alberto Ortín

In this webinar you will learn:

  • What Chemical Composition Distribution is and why it is extremely revealing in polyolefin analysis, especially for LLDPEs and PP Copolymers.
  • Why a standard GPC analysis alone is not capable of obtaining CCD because it is limited to molar mass, which doesn’t discriminate similar microstructures.
  • The appropriate methods for obtaining, in addition to molar mass, the comonomer content and short chain branching (CCD information).

The most discriminating structural property in polymers is probably missing in your GPC Analysis. Resins that seem nearly identical by a standard GPC analysis can only be fully differentiated when adding Short Chain Branching information.

Chemical Composition Distribution is a critical dimension for the study of the microstructure of polyolefins, but it is often overlooked because its impact is not widely known. This presentation will explain what Short Chain Branching Distribution is, why it is so relevant to understanding the microstructure of a resin, and how it can be obtained. Two approaches for analyzing the CCD will be presented, first by high-temperature GPC-IR, and then by the most powerful techniques based on crystallization and adsorption chromatography; TREF, CRYSTAF, CEF, and TGIC.

Watch the Webinar

About the Speaker


Alberto Ortin received a Master’s Degree in Electronics Engineering at the Polytechnic University of Valencia, Spain, and a Master’s Degree in Analytical Chemistry from the University of Valencia. He received his Ph.D. in Chemistry from the same University of Valencia in 2014.

He is now a scientist at Polymer Char, where he has accumulated 25 years of experience in the development of instruments, software, and detectors for different polyolefin characterization techniques, including GPC, TREF, and cross-fractionation. He has authored several papers on polyolefin separation methods at high temperature and is a major contributor to the technical program of the International Conference on Polyolefin Characterization.

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