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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

oughened poly(lactic acid)/thermoplastic polyurethane uncompatibilized blend

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Author(s):
Rodolfo, Mateus Garcia [1] ; Costa, Lidiane Cristina [1] ; Marini, Juliano [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Mat Engn, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF POLYMER ENGINEERING; v. 42, n. 3 JAN 2022.
Web of Science Citations: 0
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. (AU)

FAPESP's process: 17/06909-1 - Development and characterization of PLA/TPU polymer blends
Grantee:Mateus Garcia Rodolfo
Support Opportunities: Scholarships in Brazil - Scientific Initiation