Joel Miscall
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View article: Upcycling waste polystyrene to adipic acid through a hybrid chemical and biological process
Upcycling waste polystyrene to adipic acid through a hybrid chemical and biological process Open
Oxidative catalytic depolymerization of polystyrene (PS) can produce benzoic acid, but the annual consumption of benzoic acid is ~40 times lower than PS. For this catalytic oxidation method to be a viable means to manage PS waste, benzoic …
View article: Enhancing Biopolyester Backbone Rigidity with an Asymmetric Furanic Monomer
Enhancing Biopolyester Backbone Rigidity with an Asymmetric Furanic Monomer Open
Biobased furanic polyesters can exhibit performance advantages over petroleum-derived polyesters, primarily due to their rigid furan-containing backbones. Herein, we develop two strategies to polymerize methyl 5-hydroxymethyl furanoate to …
View article: Chemically Recyclable and Tunable Polyolefin‐Like Multiblock Copolymer Adhesives
Chemically Recyclable and Tunable Polyolefin‐Like Multiblock Copolymer Adhesives Open
Adhesives are important in creating multilayer products, such as in packaging and construction. Most current hot‐melt adhesives such as poly(ethylene‐co‐vinyl acetate) (EVA) and polyurethanes lack chemical recyclability and do not easily d…
View article: Chemically Recyclable and Tunable Polyolefin‐Like Multiblock Copolymer Adhesives
Chemically Recyclable and Tunable Polyolefin‐Like Multiblock Copolymer Adhesives Open
Adhesives are important in creating multilayer products, such as in packaging and construction. Most current hot‐melt adhesives such as poly(ethylene‐co‐vinyl acetate) (EVA) and polyurethanes lack chemical recyclability and do not easily d…
View article: Carboxylic Acid Concentration in Downstream Bioprocessing Using High-Pressure Reverse Osmosis
Carboxylic Acid Concentration in Downstream Bioprocessing Using High-Pressure Reverse Osmosis Open
During the production of many bio-based chemicals from fermentation and enzymatic processes, product separations frequently represent the most expensive and energy-intensive unit operations in an integrated process, often due to the low co…
View article: Repurposing Post‐Consumer Polyethylene to Access Cross‐Linked Polyethylene with Reprocessability, Recyclability, and Tunable Properties
Repurposing Post‐Consumer Polyethylene to Access Cross‐Linked Polyethylene with Reprocessability, Recyclability, and Tunable Properties Open
Polyethylene (PE) is the most widely produced plastic but accumulation and resistance to degradation has significantly contributed to the plastic waste crisis. Upcycling has presented promising solutions to transform PE waste into value‐ad…
View article: Repurposing Post‐Consumer Polyethylene to Access Cross‐Linked Polyethylene with Reprocessability, Recyclability, and Tunable Properties
Repurposing Post‐Consumer Polyethylene to Access Cross‐Linked Polyethylene with Reprocessability, Recyclability, and Tunable Properties Open
Polyethylene (PE) is the most widely produced plastic but accumulation and resistance to degradation has significantly contributed to the plastic waste crisis. Upcycling has presented promising solutions to transform PE waste into value‐ad…
View article: Upcycling Polynorbornene Derivatives into Chemically Recyclable Multiblock Linear and Thermoset Plastics
Upcycling Polynorbornene Derivatives into Chemically Recyclable Multiblock Linear and Thermoset Plastics Open
Synthetic polymers have found widespread use, but their ineffective end‐of‐life treatment is causing a significant environmental and human health crisis. Here, we demonstrate the upcycling of polynorbornene derivatives (pNBEs) through thei…
View article: Upcycling Polynorbornene Derivatives into Chemically Recyclable Multiblock Linear and Thermoset Plastics
Upcycling Polynorbornene Derivatives into Chemically Recyclable Multiblock Linear and Thermoset Plastics Open
Synthetic polymers have found widespread use, but their ineffective end‐of‐life treatment is causing a significant environmental and human health crisis. Here, we demonstrate the upcycling of polynorbornene derivatives (pNBEs) through thei…
View article: Photooxidation of Polyolefins to Produce Materials with In‐Chain Ketones and Improved Materials Properties
Photooxidation of Polyolefins to Produce Materials with In‐Chain Ketones and Improved Materials Properties Open
Herein, we report a selective photooxidation of commodity postconsumer polyolefins to produce polymers with in‐chain ketones. The reaction does not involve the use of catalyst, metals, or expensive oxidants, and selectively introduces keto…
View article: Photooxidation of Polyolefins to Produce Materials with In‐Chain Ketones and Improved Materials Properties
Photooxidation of Polyolefins to Produce Materials with In‐Chain Ketones and Improved Materials Properties Open
Herein, we report a selective photooxidation of commodity postconsumer polyolefins to produce polymers with in‐chain ketones. The reaction does not involve the use of catalyst, metals, or expensive oxidants, and selectively introduces keto…
View article: Tailoring the Properties of Chemically Recyclable Polyethylene‐Like Multiblock Polymers by Modulating the Branch Structure
Tailoring the Properties of Chemically Recyclable Polyethylene‐Like Multiblock Polymers by Modulating the Branch Structure Open
Developing plastics that fill the need of polyolefins yet are more easily recyclable is a critical need to address the plastic waste crisis. However, most efforts in this vein have focused on high‐density polyethylene (PE), while many diff…
View article: Tailoring the Properties of Chemically Recyclable Polyethylene‐Like Multiblock Polymers by Modulating the Branch Structure
Tailoring the Properties of Chemically Recyclable Polyethylene‐Like Multiblock Polymers by Modulating the Branch Structure Open
Developing plastics that fill the need of polyolefins yet are more easily recyclable is a critical need to address the plastic waste crisis. However, most efforts in this vein have focused on high‐density polyethylene (PE), while many diff…
View article: Characterization of polymer properties and identification of additives in commercially available research plastics
Characterization of polymer properties and identification of additives in commercially available research plastics Open
This work reports the analysis of 59 commercially available polymers from 20 different polymer classes for thermal properties, macrostructure, molecular mass distribution, and inorganic and organic additives, highlighting the need to chara…
View article: Correction: Characterization of polymer properties and identification of additives in commercially available research plastics
Correction: Characterization of polymer properties and identification of additives in commercially available research plastics Open
Correction for ‘Characterization of polymer properties and identification of additives in commercially available research plastics’ by Amy A. Cuthbertson et al. , Green Chem. , 2024, https://doi.org/10.1039/d4gc00659c.
View article: Chemically recyclable polyolefin-like multiblock polymers
Chemically recyclable polyolefin-like multiblock polymers Open
Polyolefins are the most important and largest volume plastics produced. Unfortunately, the enormous use of plastics and lack of effective disposal or recycling options have created a plastic waste catastrophe. In this work, we report an a…
View article: Chemical upcycling of polyethylene, polypropylene, and mixtures to high-value surfactants
Chemical upcycling of polyethylene, polypropylene, and mixtures to high-value surfactants Open
Conversion of plastic wastes to fatty acids is an attractive means to supplement the sourcing of these high-value, high-volume chemicals. We report a method for transforming polyethylene (PE) and polypropylene (PP) at ~80% conversion to fa…
View article: Mixed plastics waste valorization through tandem chemical oxidation and biological funneling
Mixed plastics waste valorization through tandem chemical oxidation and biological funneling Open
Mixed plastics waste represents an abundant and largely untapped feedstock for the production of valuable products. The chemical diversity and complexity of these materials, however, present major barriers to realizing this opportunity. In…
View article: Particle Size Reduction of Poly(ethylene terephthalate) Increases the Rate of Enzymatic Depolymerization But Does Not Increase the Overall Conversion Extent
Particle Size Reduction of Poly(ethylene terephthalate) Increases the Rate of Enzymatic Depolymerization But Does Not Increase the Overall Conversion Extent Open
Enzymatic depolymerization of poly(ethylene terephthalate) (PET) has emerged as a potential method for PET recycling, but extensive thermomechanical preprocessing to reduce both the crystallinity and particle size of PET is often conducted…
View article: Standard Analytical Methods for Pyrolysis Bio-Oils
Standard Analytical Methods for Pyrolysis Bio-Oils Open
There has been significant recent interest in the production of renewable fuels and chemicals from biomass and waste feedstocks. Pyrolysis pathways produce a liquid bio-oil product, which must be processed further, or upgraded, to yield fu…
View article: Separation of bio-based glucaric acid <i>via</i> antisolvent crystallization and azeotropic drying
Separation of bio-based glucaric acid <i>via</i> antisolvent crystallization and azeotropic drying Open
A downstream process was developed for producing pure monopotassium glucarate and crystalline glucaric acid from a fermentation broth.
View article: Lignin alkaline oxidation using reversibly-soluble bases
Lignin alkaline oxidation using reversibly-soluble bases Open
When excess base is required to drive desired reactions, such as in lignin alkaline oxidation, Sr(OH) 2 can offer a reversibly-soluble alternative to NaOH that allows simple recycle of the excess base with concomitant cost and environmenta…
View article: Recovery of low molecular weight compounds from alkaline pretreatment liquor <i>via</i> membrane separations
Recovery of low molecular weight compounds from alkaline pretreatment liquor <i>via</i> membrane separations Open
Lignin is an abundant renewable resource that is a promising substrate for upgrading to fuels and chemicals.
View article: Comparative Performance of PETase as a Function of Reaction Conditions, Substrate Properties, and Product Accumulation
Comparative Performance of PETase as a Function of Reaction Conditions, Substrate Properties, and Product Accumulation Open
Invited for this month′s cover is the BOTTLE Consortium, featuring Gregg Beckham's laboratory from NREL and John McGeehan's laboratory from the University of Portsmouth. The cover image shows the application of poly(ethylene terephthalate)…
View article: Determination of Carbon, Hydrogen, Nitrogen, and Oxygen in Bio-Oils: Laboratory Analytical Procedure (LAP)
Determination of Carbon, Hydrogen, Nitrogen, and Oxygen in Bio-Oils: Laboratory Analytical Procedure (LAP) Open
The determination of total carbon, hydrogen, and nitrogen in bio-oils is important as these values can be used to track the carbon balance of production processes as well as calculate total oxygen content by difference. Oxygen content of b…