• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2020.tde-23122020-121240
Document
Author
Full name
Pedro Marcio Munhoz
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2020
Supervisor
Committee
Calvo, Wilson Aparecido Parejo (President)
Nascimento, Fernando Codelo
Wiebeck, Hélio
Title in Portuguese
Caracterização da blenda de PBAT/PLA poli (butileno adipato cotereftalato)/poli (ácido lático) irradiada por feixe de elétrons
Keywords in Portuguese
blenda polimérica (PBAT/PLA)
caracterização
feixe de elétrons
irradiação
polímeros biodegradáveis
Abstract in Portuguese
O objetivo desta pesquisa foi caracterizar da blenda polimérica de Poli(adipato de butileno co-tereftalato)/Poli (ácido lático) (PBAT/PLA), após processamento de irradiação com feixe de elétrons em diferentes doses. As amostras foram irradiadas com doses absorvidas de 5, 10, 15, 25, 50, 65 e 80 kGy, após irradiação, foram submetidas aos experimentos de ensaios de tração, impacto, dureza, termogravimetria, calorimetria exploratória diferencial, difração de raios X (DRX) e suscetibilidade microbiana. Os resultados mostraram um incremento de 44% em relação à resistência ao impacto na dose absorvida de 65 kGy, porém o módulo de elasticidade diminuiu 56%, e a tensão de ruptura diminuiu 55% nesta mesma dose. Em relação ao alongamento, não foram observadas alterações significativas causadas pela radiação o mesmo ocorrendo com: a dureza, o grau de cristalinidade, analisada por meio do ensaio de DRX, a suscetibilidade microbiana e a temperatura de transição vítrea. Para a termogravimetria - TG foi observado um incremento de 17,4% na dose absorvida de 65 kGy, em relação ao calor de mudança cristalina do PLA, observou-se um acréscimo de 13,1% na dose de 80 kGy, entretanto, para esta mesma dose, verificou-se uma redução de: 2,4% na temperatura de fusão e de 12,1% no calor de fusão da blenda de PBAT/PLA. Para o grau de cristalinidade, analisado por meio do DSC, pode-se observar um decréscimo de 12,1%. Concluindo, essa mistura irradiada, conforme prevista pode ser usada para produzir produtos ambientalmente amigáveis os quais podem absorver energia de impacto e obter mais estabilidade térmica quando a blenda polimérica de PBAT/PLA é irradiada com a dose de 65 kGy.
Title in English
Characterization of the blend of PBAT/PLA - poly (butylene adipate co-terephthalate)/poly (lactic acid) irradiated by electron beam
Keywords in English
(PBAT/PLA) polymeric blend
biodegradable polymers
characterization
electron beam
irradiation
Abstract in English
The aim of this research was the characterization of Poly(butylene adipate coterephthalate)/ Poly(lactic acid) (PBAT/PLA) polymeric blend, after irradiation processing with electron beam in different doses. The samples were irradiated with absorbed doses of 5 kGy, 10 kGy, 15 kGy, 25 kGy, 50 kGy, 65 kGy and 80 kGy. The samples, after irradiation, were submitted to experiments of tensile test, impact, hardness, thermogravimetry, differential scanning calorimetry, X ray diffraction (XRD) and microbial susceptibility. The results showed an increment of 44% in relation impact resistance at absorbed dose of 65 kGy, however the module of elasticity decreased of 56% and ultimate strength decreased 55% at same dose, in relation of elongation was not observed significate alterations caused by radiation the same occurred with hardness, crystallinity, analyzed using the analysis XRD, microbial susceptibility and glass transition temperature. For thermogravimetry - TG was observed an increment of 17,4% at absorbed dose of 65 kGy, in relation to the heat of crystallization of the PLA, there was an increase of 13.1% in the dose of 80 kGy, however, for this same dose, there was a reduction of 2.4% in the melting temperature and 12, 1% in the heat of fusion of the PBAT / PLA blend. For the degree of crystallinity, analyzed using the DSC, a decrease of 12.1% can be observed. In conclusion, this irradiated blend could be used to make environmental friendly products, which could absorb impact energy and with more thermal stability when the polymeric blend of PBAT/PLA is irradiated with the dose of 65 kGy.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2020-12-29
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.