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.
Controlled Rheology Technology
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.
View Product RangeApplications
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.
Learn moreUpcycling 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.
Di(tert-butylperoxyisopropyl) benzene (BIPB)
High-purity bifunctional peroxide for controlled PP degradation and crosslinking applications. Excellent thermal stability with minimal odor and volatiles.
Read moreDicumyl Peroxide (DCP)
Widely used dialkyl peroxide for PP viscosity modification and polymer crosslinking. Reliable performance in reactive extrusion at standard processing temperatures.
Read more2,5-Dimethyl-2,5-di(tert-butylperoxy) hexane (DHBP)
Dialkyl peroxide offering controlled half-life characteristics for precise rheology modification of PP and PE in compounding operations.
Read more3,6,9-Triethyl-3,6,9-trimethyl-1,4,7-triperoxonane
Cyclic ketone peroxide designed for specialty applications requiring lower processing temperatures and specific decomposition kinetics.
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.
Ready to Optimize Your Recycling Process?
Our technical team is ready to help you select the right organic peroxide solution for your specific polymer recycling application. Reach out today for a consultation.