High‐Impact PLA in Compatibilized PLA/PCL Blends: Optimization of Blend Composition and Type and Content of Compatibilizer

Author:

Fernández‐Tena Ainhoa1ORCID,Otaegi Itziar1ORCID,Irusta Lourdes1ORCID,Sebastián Victor234ORCID,Guerrica‐Echevarria Gonzalo1ORCID,Müller Alejandro Jesus15ORCID,Aranburu Nora1ORCID

Affiliation:

1. POLYMAT and Department of Advanced Polymers and Materials: Physics Chemistry and Technology Faculty of Chemistry University of the Basque Country UPV/EHU Paseo Manuel de Lardizabal 3 Donostia‐San Sebastián 20018 Spain

2. Department of Chemical and Environmental Engineering. University of Zaragoza Campus Río Ebro‐Edificio I+D C/ Poeta Mariano Esquillor S/N Zaragoza 50018 Spain

3. Instituto de Nanociencia y Materiales de Aragón (INMA) CSIC‐Universidad de Zaragoza Zaragoza 50009 Spain

4. Networking Research Center on Bioengineering Biomaterials and Nanomedicine CIBER‐BBN Madrid 28029 Spain

5. IKERBASQUE Basque Foundation for Science Plaza Euskadi 5 Bilbao 48009 Spain

Abstract

AbstractIn this work, the effectiveness of seven commercial compatibilizers is tested in polylactide (PLA)/poly(ε‐caprolactone) (PCL) blends with different compositions to obtain a high‐impact PLA. None of the compatibilizers is effective for 90/10 and 80/20 PLA/PCL compositions, as no improvement of the impact strength is observed. For the 70/30 composition, compatibilizers having glycidyl methacrylate (GMA) and acrylate groups in their structure are proved the most effective, as the morphological change towards co‐continuity induced by them leads to significant impact strength improvements (of ≈345% and 90% with respect to the neat PLA and the noncompatibilized PLA/PCL 70/30 blend, respectively). The 70/30 PLA/PCL composition, as it shows the best balance of properties, and the best compatibilizer (ElvaloyPTW) are chosen to carry out the optimization of the compatibilizer content. It is found that adding 6 phr to the blend results in highly toughened and ductile blends while maintaining a high modulus and yield strength values. Larger compatibilizer contents lead to even higher impact strength values, but the low‐strain mechanical properties are notably reduced. Thus, in this work, a simple and easily scalable method to produce high‐impact PLA is shown, as it implies the compounding of three commercially available components without involving any toxic solvents.

Funder

Eusko Jaurlaritza

Ministerio de Ciencia e Innovación

Publisher

Wiley

Subject

Materials Chemistry,Polymers and Plastics,Organic Chemistry,General Chemical Engineering

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