Presented by:
Sarfraz Haider Abbasi, SABIC

The structure of polymers significantly influences their end-use properties. Consequently, certain polymer structures, despite being challenging to process, are utilized for their superior end-user benefits. Metallocene-based linear low-density polyethylene (m-LLDPE) exemplifies this, offering enhanced mechanical properties, superior clarity, and gloss in flexible packaging applications. Additionally, m-LLDPE facilitates down-gauging, leading to material savings and reduced environmental impact.

To mitigate the melt fracture behavior of m-LLDPE, polymer processing aids (PPAs) such as polyfluorinated substances (PFAS) are employed. PFAS, including perfluoroalkoxy (PFA), are fluoropolymers similar to PTFE but with improved chemical resistance and flexibility, and can be melt-processed. However, due to environmental health and safety concerns there is a growing call to supplant PFAS in various polymer grades.  Many EU countries and US states have already banned or restricted PFAS, with other regions are expected to follow. 

At SPADC Rheology lab, efforts are underway to develop robust test procedures enabling SABIC scientists and engineers to evaluate alternatives to PFAS PPAs. This initiative includes a collaborative research project with the University of British Columbia (UBC) aiming at developing and validating these rheological procedures as well as building fundamental understanding for the factors driving the melt fracture performance.

About Sarfraz Haider Abbasi

As a Lead Scientist working at SABIC Plastic Application Development Center, he has 14 years’ experience of developing and handling Thermal & Rheology Lab.  He developed testing competencies for PC, ABS, POM, PMMA, ABS and BR, apart from regular & advanced techniques for polyolefin characterization. His expertise include Thermal and Rheological characterization of polymers, managing the lab operations and capex potentials, training / mentoring lab staff, young engineers and scientist working in the company. 

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