Microplastics Originating from Polymer Blends: An Emerging Threat?

No one can have missed the growing global environmental problems with plastics ending up as microplastics in food, water, and soil, and the associated effects on nature, wildlife, and humans. A hitherto not specifically investigated source of microplastics is polymer blends. A 1 g polymer blend can contain millions to billions of micrometer-sized species of the dispersed phase and therefore aging-induced fragmentation of the polymer blends can lead to the release of an enormous amount of microplastics. Especially if the stability of the dispersed material is higher than that of the surrounding matrix, the risk of microplastic migration is notable, for instance, if the matrix material is biodegradable and the dispersed material is not. The release can also be much faster if the matrix polymer is biodegradable. The purpose of writing this feature article is to arise public and academic attention to the large microplastic risk from polymer blends during their development, production, use, and waste handling.

[1]  D. Groneberg,et al.  Research landscape of a global environmental challenge: Microplastics. , 2019, Water research.

[2]  H. Ismail,et al.  An overview of toughening polylactic acid by an elastomer , 2019, Polymer-Plastics Technology and Materials.

[3]  M. Bigalke,et al.  Microplastics in Swiss Floodplain Soils. , 2018, Environmental science & technology.

[4]  Roberto Scaffaro,et al.  Degradation of polymer blends: A brief review , 2017 .

[5]  A. Booth,et al.  Biodegradability of Plastics: Challenges and Misconceptions. , 2017, Environmental science & technology.

[6]  Wei Yang,et al.  Formation of various crystalline structures in a polypropylene/polycarbonate in situ microfibrillar blend during the melt second flow. , 2016, Physical chemistry chemical physics : PCCP.

[7]  Wei Yang,et al.  Nanoparticle retarded shape relaxation of dispersed droplets in polymer blends: an understanding from the viewpoint of molecular movement , 2014 .

[8]  M. Celina.  Review of polymer oxidation and its relationship with materials performance and lifetime prediction , 2013 .

[9]  Long Yu,et al.  Polymer blends and composites from renewable resources , 2006 .

[10]  C. Chan,et al.  Crystallization and melting behavior of compatibilized polymer blends , 2020 .

[11]  Sabu Thomas,et al.  Introduction: Polymer blends, thermodynamics, miscibility, phase separation, and compatibilization , 2020 .

[12]  Maurizio Tosin,et al.  Biodegradation rate of biodegradable plastics at molecular level , 2018 .

[13]  Wei Yang,et al.  Toughening of polyamide 6 with β-nucleated thermoplastic vulcanizates based on polypropylene/ethylene–propylene–diene rubber grafted with maleic anhydride blends , 2012 .

[14]  Leszek A. Utracki,et al.  Polymer Blends Handbook , 2003 .