Plastic Recycling: Matching Technology to Material Complexity
Overview
A recent article by BASF researchers, published in the journal Accounts of Materials Research, examines how different plastic recycling technologies must be matched to the specific type of plastic waste being processed. While common packaging plastics like polyolefins can often be handled through standard approaches, specialty plastics used in demanding applications—such as compounded polyolefins, polyurethanes, and polyamides used in automotive parts—require more tailored recycling solutions.
No One-Size-Fits-All Solution
According to Dr. Bernhard von Vacano, lead author and head of BASF’s Plastics Circularity Research Program, there isn’t a single universal technology capable of recycling all engineering plastics. Instead, achieving true circularity depends on combining multiple complementary technologies suited to the composition of each specific waste stream, alongside scalable sorting infrastructure. The ultimate goal is producing high-quality recycled materials that can support a genuinely closed-loop system.
Four Recycling Pathways
Mechanical Recycling The most widely used method, mechanical recycling involves sorting, crushing, and melting plastics. It’s energy-efficient and works well for high-volume, relatively pure packaging waste. However, it has limitations: it requires clean, homogeneous input streams, struggles with complex polymer mixtures, and quality/hygiene standards can restrict its use in new packaging applications—making it less suitable for technically demanding products.
Solvent-Based Recycling For more complex waste streams, solvent-based recycling offers an alternative. This method uses solvents to selectively dissolve, separate, and purify a specific plastic type. One practical example is recovering polyamides from end-of-life vehicles for reuse in manufacturing new components.
Depolymerization This technology breaks plastics down into their fundamental chemical building blocks, which can then be reassembled into new material. BASF’s own innovation in this space, called loopamid®, enables textile-to-textile recycling of polyamide 6, converting waste textiles into fibers that meet the same quality standards as virgin polyamide 6. The company launched its first commercial-scale loopamid facility in early 2025 at its Caojing site in Shanghai.
Thermochemical Processes For highly heterogeneous waste streams that typically end up incinerated, thermochemical methods like pyrolysis and gasification offer a recycling route, though they are energy-intensive. Pyrolysis breaks long polymer chains into shorter hydrocarbon chains, yielding pyrolysis oil as a usable raw material. Gasification instead produces syngas, which can serve as a chemical feedstock.
Barriers to Scaling Up
While BASF’s pilot projects have shown that recycling polyurethanes and polyamides back into virgin-quality feedstock is technically achievable, two major conditions must be met for widespread deployment. Dr. Jens Hamprecht, co-author and Vice President in BASF’s Performance Materials division, points to the need for effective long-term waste management systems and clear, reliable regulatory frameworks from policymakers to support investment in recycling infrastructure.
Broader Significance
Recycling is framed as a critical component of the shift toward a sustainable economy—keeping materials in circulation, reducing reliance on fossil resources, and conserving raw materials. The article suggests that predictable regulatory policies could help establish Germany and Europe as innovation hubs, driving technological progress and sustainable growth across the chemical and manufacturing sectors. BASF states it continues researching across the full value chain to refine recycling processes and close material loops.
https://www.basf.com/global/en/media/news-releases/2026/07/p-26-131