We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Polylactic Acid/Polycaprolactone Blends: On the Path to Circular Economy, Substituting Single-Use Commodity Plastic Products
Summary
This study tested blends of polylactic acid (PLA) and polycaprolactone (PCL) — two biodegradable plastics — as potential replacements for conventional oil-based plastics like polypropylene. Results showed these bioplastic blends can achieve comparable mechanical properties, supporting their use in circular economy applications.
Circular economy comes to break the linear resource to waste economy, by introducing different strategies, two of them being: using material from renewable sources and producing biodegradable products. The present work aims at developing polylactic acid (PLA), typically made from fermented plant starch, and polycaprolactone (PCL) blends, a biodegradable polyester, to study their potential to be used as substitutes of oil-based commodity plastics. For this, PLA/PCL blends were compounded in a batch and lab scale internal mixer and processed by means of injection molding. Tensile and impact characteristics were determined and compared to different thermoplastic materials, such as polypropylene, high density polyethylene, polystyrene, and others. It has been found that the incorporation of PCL into a PLA matrix can lead to materials in the range of 18.25 to 63.13 megapascals of tensile strength, 0.56 to 3.82 gigapascals of Young's modulus, 12.65 to 3.27 percent of strain at maximum strength, and 35 to 2 kJ/m2 of notched impact strength. The evolution of the tensile strength fitted the Voigt and Reuss model, while Young's modulus was successfully described by the rule of mixtures. Toughness of PLA was significantly improved with the incorporation of PCL, significantly increasing the energy required to fracture the specimens. Blends containing more than 20 wt% of PCL did not break when unnotched specimens were tested. Overall, it was found that the obtained PLA/PCL blends can constitute a strong and environmentally friendly alternative to oil-based commodity materials.
Sign in to start a discussion.
More Papers Like This
A Review of Bioplastics and Their Adoption in the Circular Economy
This review examines the current landscape of bioplastics, including bio-based and biodegradable materials, as potential alternatives to conventional fossil-fuel-derived plastics. Researchers assessed standards, life cycle analyses, and environmental performance of various bioplastic types. The study highlights that while bioplastics offer potential benefits for reducing fossil resource dependency, challenges remain around their actual environmental performance and integration into circular economy systems.
Properties of reclaimed polypropylene microplastic-polylactic acid blends
This study explored whether mixing reclaimed microplastic polypropylene with biodegradable PLA plastic could reduce environmental harm while preserving useful mechanical properties. The blends were tested in seawater and buried in soil to assess biodegradation, and a 90% PP / 10% PLA blend retained the highest tensile strength after seawater immersion. Higher PLA content accelerated biodegradation but reduced thermal stability and strength. The research offers a potential strategy for making recovered microplastic materials more environmentally manageable without sacrificing too much performance.
The Potential of Bio-Based Polylactic Acid (PLA) as an Alternative in Reusable Food Containers: A Review
This review evaluates polylactic acid as a potential sustainable alternative to polypropylene in reusable food containers, examining its mechanical, thermal, and barrier properties. Researchers found that while PLA has limitations including brittleness and heat sensitivity, these can be improved through blending with other biopolymers. The study compares PLA-based composites against conventional polypropylene and considers end-of-life options and commercial costs of making the switch.
Characterization of biodegradable polymers: A review
This review characterizes three biodegradable polymers — polycaprolactone, polylactic acid, and polybutylene succinate — as potential replacements for conventional plastics. Biodegradable alternatives that fully break down are important for reducing the accumulation of persistent microplastics in soil and aquatic environments.
Advanced Plastic Waste Recycling—The Effect of Clay on the Morphological and Thermal Behavior of Recycled PET/PLA Sustainable Blends
Researchers prepared blends of recycled PET and bio-based polylactic acid (PLA) with clay additives, finding that clay incorporation affects the morphological and thermal properties of the mixed plastic, with implications for improving PET/PLA recycling compatibility.