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CoFe2O4 Nano-particles for Radical Oxidative Degradation of High Molecular Weight Polybutadiene

  • Dario Espino
  • Yaara Haruvy-Manor
  • Yitzhak MastaiEmail author
Original paper

Abstract

Polymer waste production increased dramatically in the last decades, and has reached to 380 million tons (Mt.) in 2015. Due to their long-term stability, these materials impose a serious environmental challenge. Currently, recycling of polymer waste focuses on re-use of actual products, mechanical processing, chemical recycling, and bio-degradation into environmentally friendly materials. In our previous work, we proposed a new approach for radical-initiated oxidative degradation of polymers using cobalt ferrite (CoFe2O4) nanoparticles. In our current work, we focus on the use of CoFe2O4 nanoparticles as catalysts for radical degradation of high molecular weight polybutadiene. Cobalt ferrite nanoparticles were embedded into the polybutadiene polymeric matrix, with the aim of studying degradation in polymeric products that can be manufactured with catalytic nanoparticles. The polymer degradation process was characterized using gel permeation and size exclusion chromatography measurements, thermogravimetric analysis, FTIR, NMR, and mass spectroscopy. Based on the results from these diverse measurements, we propose a mechanism for the degradation process. Overall, our results show that the radical processes within the polybutadiene polymer lead to two parallel processes: polymer crosslinking and polymer scission. Moreover, we show that the ratio between crosslinking and degradation can be controlled by the reaction duration and catalyst concentration.

Keywords

Sonochemistry Radical degradation Magnetic CoFe2O4 nanoparticles Elastomer based polymers Polymers recycling 

Notes

Acknowledgements

We would like to acknowledge Mr. Mochalov Alexander for assistance with GPC measurements, Dr. Michal Weitman for assistance with APCI-MS measurements, Dr. Michal Afri for assistance with NMR measurements, and our research group for their support throughout this work.

Supplementary material

10924_2019_1399_MOESM1_ESM.docx (1023 kb)
Supplementary material 1 (DOCX 1022 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Chemistry and Bar-Ilan Institute for Nanotechnology and Advanced Materials (BINA)Bar-Ilan UniversityRamat GanIsrael
  2. 2.Soreq Nuclear Research Center (SNRC)YavneIsrael

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