Banca de DEFESA: CASSIANO RODRIGO DALBERTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CASSIANO RODRIGO DALBERTO
DATA : 31/10/2022
HORA: 13:30
LOCAL: IFRS -campus Farroupilha- sala320
TÍTULO:

INFLUENCE OF ZINC OXIDE ON MECHANICAL, THERMAL AND BIOLOGICAL PROPERTIES WHEN ADDED TO POLYPROPYLENE.

PALAVRAS-CHAVES:

Polypropylene. Zinc oxide. Compound. Properties.

PÁGINAS: 98
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Polímeros, Aplicações
RESUMO:

Polypropylene is one of the most consumed polymers in the world, due to its large production capacity in line with its low cost, which made it possible to use it in several applications. PP has characteristics that allow its use in injection, extrusion, thermoforming, rotational molding, and blow molding processes. The main application of polypropylene is in the food sector, representing 32% in products such as: packaging, lids, bowls, pots, bottles, and gallons. In the consumer goods sector, PP represents 17% of the market and is present in packaging and boxes. The addition of mineral fillers to thermoplastic polymers such as polypropylene (PP) has long been related to an attempt to reduce costs. Currently, with the technological development of the industry and new applications, the loads have gained greater importance and started to serve more than the economic objective, by adding improvements in the physical and chemical characteristics of the products. Recent studies show that zinc oxide can be added in polyolefins to improve mechanical properties, resistance to ultraviolet radiation and antimicrobial properties. The present work aims to evaluate the influence of the presence of zinc oxide on the mechanical, rheological, thermal, resistance to ultraviolet radiation and antimicrobial action of the compound formed by polypropylene and zinc oxide. PP compounds were prepared with commercial zinc oxide (ZnO) additives from two different suppliers, with different particle shapes and different average particle size (ZnO B and ZnO D) in the proportions of 0%, 1%, 3% and 5% in large scale. The samples were characterized by means of their rheological, physical, mechanical, thermal properties, bacterial activity and submitted to the accelerated aging test by UV degradation. The results showed that the content, size, shape and medium where the ZnO particles were dispersed interfere with the properties evaluated. The presence of zinc oxide affected the mechanical properties of the compounds, considerably increased the resistance to UV degradation of the polymer and gave the PP ZnO D compound the bactericidal property. In general, the compounds with the additive showed better results both in the physical-mechanical properties evaluated and in the biocide properties when compared to the pure material.

MEMBROS DA BANCA:
Presidente - 1332290 - EDSON LUIZ FRANCISQUETTI
Interno - 3162537 - MARA ZENI ANDRADE
Externo ao Programa - 868.743.149-04 - ANA PAULA BILCK - UVI
Externo à Instituição - FERNANDA TRINDADE GONZALEZ DIAS - UFRGS