Toughened poly(lactic acid)/thermoplastic polyurethane uncompatibilized blends
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Mateus Garcia Rodolfo
Abstract
Poly(lactic acid), PLA, is a biodegradable polymer obtained from renewable sources with similar properties when compared with petroleum-based thermoplastics but with inherent brittleness. In this work, the use of thermoplastic polyurethane (TPU) as toughening agent was evaluated. PLA/TPU blends with 25 and 50 wt% of TPU were produced in an internal mixer without the use of compatibilizers. Their thermal, rheological, and mechanical properties were analyzed and correlated with the developed morphology. Immiscible blends with dispersed droplets morphology were obtained, and it was observed an inversion between the matrix and dispersed phases with the increase of the TPU content. The presence of TPU altered the elasticity and viscosity of the blends when compared to PLA, besides acting as a nucleating agent. Huge increments in impact resistance (up to 365%) were achieved, indicating a great potential of TPU to be used as a PLA toughening agent.
Funding source: Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Award Identifier / Grant number: 2017/06909-1
Funding source: Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Award Identifier / Grant number: 427639/2016-6
Acknowledgments
The authors thank FAPESP and CNPq for the financial aid, Scandiflex do Brasil S.A. for the TPU donation and Pedro H. S. Vieira and Jéssica M. O. Silva for the assistance during the processing of the samples.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was supported by The São Paulo Research Foundation, FAPESP (Process 2017/06909-1) and National Council for Scientific and Technological Development, CNPq (Process 427639/2016-6).
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Conflict of interest statement: The authors declare that there are no conflicts of interest regarding this article.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Material Properties
- Morphology, thermal and mechanical properties of electrospun polyvinylidene/polyethylene glycol composite nanofibers as form-stabilized phase change materials
- Design of experiments for the methylene blue adsorption study onto biocomposite material based on Algerian earth chestnut and cellulose derivatives
- Characterization of polypropylene/magnesium oxide/vapor-grown carbon fiber composites prepared by melt compounding
- Preparation and Assembly
- Toughened poly(lactic acid)/thermoplastic polyurethane uncompatibilized blends
- Preparation of hydrophilic modified polyvinylidene fluoride (PVDF) ultrafiltration membranes by polymer/non-solvent co-induced phase separation: effect of coagulation bath temperature
- Fabrication of inverted organic solar cells on stainless steel substrate with electrodeposited and spin coated ZnO buffer layers
- Engineering and Processing
- A review on 3D printing in tissue engineering applications
- Application of radiation grafted waste polypropylene fabric for the effective removal of Cu (II) and Cr (III) ions
Artikel in diesem Heft
- Frontmatter
- Material Properties
- Morphology, thermal and mechanical properties of electrospun polyvinylidene/polyethylene glycol composite nanofibers as form-stabilized phase change materials
- Design of experiments for the methylene blue adsorption study onto biocomposite material based on Algerian earth chestnut and cellulose derivatives
- Characterization of polypropylene/magnesium oxide/vapor-grown carbon fiber composites prepared by melt compounding
- Preparation and Assembly
- Toughened poly(lactic acid)/thermoplastic polyurethane uncompatibilized blends
- Preparation of hydrophilic modified polyvinylidene fluoride (PVDF) ultrafiltration membranes by polymer/non-solvent co-induced phase separation: effect of coagulation bath temperature
- Fabrication of inverted organic solar cells on stainless steel substrate with electrodeposited and spin coated ZnO buffer layers
- Engineering and Processing
- A review on 3D printing in tissue engineering applications
- Application of radiation grafted waste polypropylene fabric for the effective removal of Cu (II) and Cr (III) ions
