Rebuilding the Properties of Recycled Polyolefins
Bridging the performance gap between virgin and recycled Polypropylene (PP) and Polyethylene (PE) with advanced organic peroxide technologies.
The Challenge
Key Barriers in Post-Consumer Recycled (PCR) Polyolefins
Recycled polyolefins face three fundamental obstacles that limit their re-introduction into high-value applications. Understanding these challenges is the first step toward effective solutions.
Limited & Inconsistent MFI Range
Post-consumer recycled polyolefins exhibit a wide and often unsuitable Melt Flow Index (MFI) range, making consistent processing in injection molding and extrusion applications extremely challenging.
Inferior Performance vs. Virgin Material
Recycled PP and PE typically show reduced mechanical properties — lower tensile strength, impact resistance, and thermal stability — compared to their virgin counterparts, restricting end-use applications.
Inconsistent Blend & Broad Molecular Weight Distribution
PCR streams are heterogeneous mixtures of different polymer grades, contaminants, and degradation products, resulting in unpredictable processing behavior and final product quality.
Our Solution
Organic Peroxide-Based Chain Modification for Recycled Polyolefins
At Shandong Do Sender Chemicals, we provide advanced organic peroxide solutions that enable precise control over the molecular structure and rheological properties of recycled polyolefins. Our controlled-rheology peroxides initiate selective chain scission and branching reactions, tailoring the MFI, molecular weight distribution, and mechanical properties of PCR materials.
By applying our organic peroxide technology, recyclers and compounders can transform inconsistent, low-value PCR streams into high-performance materials suitable for demanding applications — effectively closing the gap between recycled and virgin polyolefins.
- Precise MFI adjustment through controlled degradation
- Improved mechanical properties and processability
- Consistent batch-to-batch quality for industrial applications
- Enables higher PCR content in finished products
Organic Peroxides for Controlled Rheology Polypropylene (CR-PP)
Our specialized organic peroxide grades are engineered for the reactive extrusion of recycled polypropylene. They enable precise, predictable reduction of molecular weight and narrowing of molecular weight distribution, producing controlled-rheology PP with consistent MFI and improved processing characteristics.
Whether you need to adjust MFI from low-flow to high-flow grades or stabilize inconsistent PCR feedstocks, our peroxide solutions deliver reliable, repeatable results at industrial scale.
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Applications
Upcycling Recycled Polyolefins for High-Value Markets
Our organic peroxide technology enables recycled PP and PE to meet the demanding specifications of injection molding, film extrusion, and fiber production.
Upcycling of Polypropylene (PP)
Transform post-consumer and post-industrial PP waste into controlled-rheology grades suitable for injection molding, automotive components, household goods, and packaging applications. Achieve target MFI values consistently with precise peroxide dosing.
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Upcycling of Polyethylene (PE)
Enhance the processability and performance of recycled HDPE and LDPE for film blowing, blow molding, and pipe extrusion. Our peroxide grades enable controlled crosslinking and branching to restore mechanical integrity in recycled PE streams.
Learn moreFeatured Products
Organic Peroxides for Polymer Recycling
Our portfolio of high-purity organic peroxides is designed to meet the rigorous demands of reactive extrusion and polymer modification processes.
Perodox DCP
Dicumyl peroxide — industry standard for controlled degradation of recycled PP and PE, delivering consistent MFI adjustment in reactive extrusion.
Read morePerodox 101
High-temperature organic peroxide for demanding recycling applications requiring precise molecular weight control at elevated processing temperatures.
Read morePerodox B
Versatile peroxide grade optimized for chain scission in polyolefin recycling, enabling efficient MFI adjustment with minimal side reactions.
Read morePerodox 14
Specialized peroxide for controlled rheology modification of recycled polyolefins in compounding and extrusion operations.
Read morePerodox 22
Efficient initiator for viscosity modification of recycled polyolefins, providing predictable decomposition kinetics for consistent processing.
Read morePerodox 187
High-performance peroxide for advanced polymer recycling processes, delivering precise control over molecular weight distribution.
Read morePerodox 117
Reliable initiator for medium-temperature reactive extrusion of recycled PP and PE, ensuring consistent batch-to-batch quality.
Read morePerodox 21
Specialized peroxide designed for demanding recycling applications requiring advanced chain modification and property restoration.
Read moreResources
Technical Downloads
Access our technical documentation to learn more about how Do Sender organic peroxides can optimize your polymer recycling operations.
Insights
Related Articles & Industry Insights
Stay informed with the latest developments in polymer recycling technology and circular economy initiatives.
Closing the Loop: How Organic Peroxides Enable True Circularity in Polyolefins
From PCR to Prime: Meeting Automotive-Grade Specifications with Recycled PP
The Role of Controlled Rheology in Advancing Mechanical Recycling Economics
Company News
Latest Updates from Do Sender Chemicals
Recent milestones in our commitment to advancing polymer recycling technology and sustainable chemistry.
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Q1 2026
Expanded Organic Peroxide Production Capacity for Polymer Recycling Applications
New production line commissioned to meet growing global demand for controlled-rheology peroxide grades in circular economy applications.
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Q4 2025
Do Sender Chemicals Partners with Leading European Recyclers
Strategic collaboration to develop next-generation peroxide formulations optimized for mixed polyolefin recycling streams.
Contact Our Experts
For more information about our products and solutions, please contact our experts. We look forward to hearing from you.