Recycling of a post-industrial printed multilayer plastic film containing polyurethane inks by solvent-targeted recovery and precipitation

The recently reported Solvent-Targeted Recovery And Precipitation (STRAP) strategy is used to deconstruct multilayer plastic packaging films into their constituent resins by selective polymer dissolution. To broaden the applicability of STRAP, we demonstrate the process with a flexible post-industrial printed multilayer plastic film used for food packaging. The material was a reverse printed film composed of polyethylene (PE), ethylene vinyl alcohol (EVOH), polyethylene terephthalate (PET), and polyurethane (PU)-based inks. Removal of all colors was observed with biomass-derived gamma-valerolactone (GVL) and the recovered polymers possessed comparable properties to the corresponding virgin resins. A technoeconomic analysis indicates that this STRAP process could be economically feasible at a processing capacity of 6,000 tons per year. Moreover, the production of plastic films with materials recovered by this STRAP process can have a lower climate change impact than the production of films from virgin polymers

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Less than 10% of the plastics generated globally are recycled, while the rest are incinerated, accumulated in landfills, or leach into the environment. New technologies are emerging to chemically recycle waste plastics that are receiving tremendous interest from academia and industry. Chemists and chemical engineers need to understand the fundamentals of these technologies to design improved systems for chemical recycling and upcycling of waste plastics. In this paper, we review the entire life cycle of plastics and options for the management of plastic waste to address barriers to industrial chemical recycling and further provide perceptions on possible opportunities with such materials. Knowledge and insights to enhance plastic recycling beyond its current scale are provided. Outstanding research problems and where researchers in the field should focus their efforts in the future are also discussed

Cross-Monitoring and Corporate Governance

We take the view that corporate governance must involve more than corporate law. Despite corporate scholars\u27 nearly exclusive focus on corporate law mechanisms for controlling managerial agency costs, shareholders are not the only constituency concerned with such costs. Given the thick web of firms\u27 contractual commitments, it should not be a surprise that other financial claimants may also attempt to control agency costs in their contracts with the firm. We hypothesize that this cross-monitoring by other claimants has value for shareholders. We examine bank loans for empirical evidence of the value of cross-monitoring. Our approach builds on prior empirical work on the value of good corporate governance, to which we add data on the presence of bank loans and their interactions with free cash flow, governance indices, and individual corporate governance provisions. To our knowledge, ours is the first study to measure the performance effects of bank debt as a device for reducing managerial agency costs, and the first study on the interaction of ongoing bank monitoring with corporate governance arrangements. We find strong evidence that bank monitoring adds value. In effect, bank monitoring can counteract somewhat the value-decreasing effects of managerial entrenchment. Bank monitoring may substitute for good corporate governance