Invention Reference Number
This technology enables post-consumer Polyethylene terephthalate (PET) waste to be transformed into a reusable material platform that delivers high-performance adhesives, reprocessable vitrimer materials, and fiber-reinforced composites. The approach addresses the limitations of conventional recycling by enabling materials with mechanical and adhesive performance exceeding standard PET and common commercial adhesives, while also supporting multiple reuse and reconfiguration cycles. The resulting materials provide manufacturers with a versatile, closed-loop pathway to recover value from mixed PET waste streams and deploy recovered plastics in demanding structural, bonding, and molded-product applications.
Description
Researchers developed a practical process that converts mixed post-consumer PET waste into a dynamic polymer network capable of being configured as high-strength vitrimer plastics, reversible adhesives, and fiber-reinforced composites. The resulting materials exhibit mechanical performance that exceeds that of conventional PET, while retaining the ability to be reshaped, repaired, and reprocessed after use.
The same recovered material platform can be formulated as a versatile adhesive system that delivers strong and tough bonding under both wet and dry conditions, including structural and pressure-sensitive uses. The adhesive demonstrates high resistance to environmental exposure, strong bonding on multiple substrates, and repeatable debonding and rebonding through controlled reconfiguration, enabling removal, repair, and reuse.
In addition to standalone polymers and adhesives, the recovered material can be combined with reinforcing fibers to produce high-performance composite materials while maintaining the ability to recover both the polymer and reinforcement for reuse. Material performance can be tuned to meet different manufacturing requirements without returning to virgin feedstocks, supporting repeated product life cycles from the same recovered PET resource.
Benefits
- Enables high-performance materials from PET waste, including polymers, adhesives, and composites
- Supports multiple reprocessing, repair, and reuse cycles with minimal loss of performance
- Provides versatile bonding capabilities across wet, dry, and pressure-sensitive applications
- Allows tunable mechanical and adhesive properties for different product requirements
Applications and Industries
- Structural, underwater, and pressure-sensitive adhesives
- Reprocessable polymer components and molded products
- Fiber-reinforced polymer composites
- Additive manufacturing and advanced plastics processing
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
