Highly Recyclable and Reprocessable Polymers based on Polydithioacetals


The global plastic waste production continues to accelerate at an alarming rate introducing grave environmental effects that urgently warrants to produce degradable/recyclable plastics. Most post-consumer plastic waste are not recycled, and are leaked into the environment or end up in landfill. The barriers to recycling of commodity plastics relate to the separation, impurities, and polymer degradation of end-of-life plastics. These factors negatively impact the properties of recycled plastics. Dynamic covalent polymers are an active area of research to develop polymers capable of chemical recycling to monomers (CRM). As a result, plastic can transform back to monomers to be purified and repolymerize creating a circular economy based on CRM.


Based on the chemistry of dithioacetal ring-chain equilibrium and dithioacetal exchange reactions, a crosslinked rubbery polymeric material that can be reprocessed at high temperatures and depolymerized back into cyclic macrocycles has been developed. Such materials are vital to the sustainability and recyclability of plastics and rubbers.


  • No need for purification of mixtures of macrocycles after ring-closing depolymerization
  • Ring-opening re-polymerization could be carried out at ambient temperature
  • Tunable rates and efficiency of polymerization process

Patent pending



Contact Information

TTO Home Page: https://unr.technologypublisher.com

Name: Ray Siripirom

Title: Senior Licensing Associate

Email: csiripirom@unr.edu