@MastersThesis{Silva:2021:BoApAe,
               author = "Silva, Wiliam Oliveira da",
                title = "S{\'{\i}}ntese e caracteriza{\c{c}}{\~a}o do comp{\'o}sito 
                         polietileno de ultra-alto peso molecular - boro para 
                         aplica{\c{c}}{\~o}es aeroespaciais",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2021",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2020-12-08",
             keywords = "PEUAPM, boro amorfo, comp{\'o}sito, atenua{\c{c}}{\~a}o de 
                         radia{\c{c}}{\~a}o gama, UHMWPE, amorphous boron, composite, 
                         gamma rays attenuation.",
             abstract = "Este trabalho visou o estudo do comp{\'o}sito formado por 
                         polietileno de ultra-alto peso molecular (PEUAPM) que {\'e} a 
                         matriz , e boro amorfo que {\'e} o aditivo , para a 
                         utiliza{\c{c}}{\~a}o aeroespacial visando a sua 
                         aplica{\c{c}}{\~a}o na blindagem de radia{\c{c}}{\~o}es gama 
                         ou f{\'o}tons de alta energia. Os materiais, que foram produzidos 
                         variando-se as quantidades de aditivo em cada um deles 2,5%, 5,0%, 
                         7,5% e 10% em termos de volume foram produzidos por meio da 
                         t{\'e}cnica de compress{\~a}o t{\'e}rmica para a 
                         consolida{\c{c}}{\~a}o da matriz polim{\'e}rica. T{\'e}cnicas 
                         de caracteriza{\c{c}}{\~a}o foram utilizadas para determinar as 
                         propriedades dos materiais e prov{\'a}veis altera{\c{c}}{\~o}es 
                         nas intera{\c{c}}{\~o}es entre part{\'{\i}}culas ou 
                         mol{\'e}culas dos dois componentes, assim como explicar 
                         comportamentos espec{\'{\i}}ficos em ensaios mec{\^a}nicos e 
                         t{\'e}rmicos realizados nos mesmos. Nos ensaios envolvendo 
                         imagens, tais como microscopias estereosc{\'o}pica e 
                         eletr{\^o}nica de varredura foi poss{\'{\i}}vel verificar a boa 
                         dispers{\~a}o do material aditivo na matriz. Observou-se que 
                         apesar das propriedades mec{\^a}nicas, tais como m{\'o}dulo de 
                         elasticidade, limite de resist{\^e}ncia {\`a} tra{\c{c}}{\~a}o 
                         e alongamento apresentarem tend{\^e}ncias de terem sido 
                         prejudicadas para fra{\c{c}}{\~o}es maiores de aditivo no 
                         material, existe uma prov{\'a}vel correla{\c{c}}{\~a}o entre a 
                         quantidade de aditivo e a varia{\c{c}}{\~a}o de propriedades 
                         tais como coeficiente de atenua{\c{c}}{\~a}o para 
                         radia{\c{c}}{\~a}o gama, temperatura de fus{\~a}o e de 
                         distor{\c{c}}{\~a}o ao calor, para as quais ocorreu alguma 
                         melhora em fun{\c{c}}{\~a}o do aumento da quantidade de aditivo. 
                         ABSTRACT: This work aimed the study of the composite formed by 
                         ultra high-molecular weight polyethylene (UHMWPE) that is a matrix 
                         and amorphous boron that is an additive , for aerospacial use, 
                         aiming at its application in shielding gamma rays or high-energy 
                         photons. The materials, that were produced by varying the amounts 
                         of additive in each of them 2,5%, 5,0%, 7,5% and 10%, depending of 
                         volume were produced through thermic compression technique for the 
                         consolidation of the polymeric matrix. Caracterization techniques 
                         were used to determine the properties of the materials and 
                         probably variations in the interactions between particles or 
                         molecules of the two components, so how explain specific 
                         behaviours at mechanic and thermal tests performed on the same. In 
                         the tests involving images, such as stereoscopic microscopy and 
                         scanning electronic microscopy it was possible to verify the good 
                         dispersion of the additive material in the matrix. It was observed 
                         that despite the mechanical properties, such as modulus of 
                         elasticity, limit of tensile strength and elongation, tend to 
                         decrease for larger fractions of additive in the material, there 
                         is a probable correlation between the amount of additive and the 
                         variation of properties such as attenuation coefficient for gamma 
                         rays, melting temperature and heat distortion temperature, for 
                         which some improvement has occurred due to the increase in the 
                         amount of additive.",
            committee = "Nono, Maria do Carmo de Andrade (presidente/orientadora) and Melo, 
                         Francisco Crist{\'o}v{\~a}o Louren{\c{c}}o de (orientador) and 
                         Federico, Claudio Antonio (orientador) and In{\'a}cio, Miguel 
                         Adriano and Del'Arco J{\'u}nior, Ant{\^o}nio Paschoal",
         englishtitle = "Synthesis and characterization of the ultra-high molecular weight 
                         polyethylene - boron composite for aerospace applications",
             language = "pt",
                pages = "167",
                  ibi = "8JMKD3MGP3W34R/443QUE5",
                  url = "http://urlib.net/ibi/8JMKD3MGP3W34R/443QUE5",
           targetfile = "publicacao.pdf",
        urlaccessdate = "20 maio 2024"
}