Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Marcelo Silveira Rabello"'
Autor:
Frederick Louis Dias de Morais, Felipe da Silva Medeiros, Glaura Goulart Silva, Marcelo Silveira Rabello, Alexandre Rangel de Sousa
Publikováno v:
Materials Research, Vol 20, Iss 2, Pp 356-364 (2017)
Ultra high molecular weight polyethylene (UHMWPE) is one of the most important engineering materials owing to outstanding properties like impact strength and abrasion resistance. However, the relatively low Young´s modulus restricts some application
Externí odkaz:
https://doaj.org/article/2f16428449d64a458ee4d381c15f9593
Publikováno v:
Materials Research, Vol 22, Iss 3 (2019)
The aim of this work was to evaluate the photo degradation of PP films containing photo stabilizers, a ultraviolet absorber and a hindered amine light stabilizer (HALS), and a red pigment. The films were produced by extrusion and exposed to the UV ra
Externí odkaz:
https://doaj.org/article/faf8091aa7bc40dda5126c12edc52c4b
Autor:
Renate Maria Ramos Wellen, Eduardo Luís Canedo, Marcelo Silveira Rabello, Guilhermino José Macêdo Fechine
Publikováno v:
Materials Research, Vol 19, Iss 4, Pp 759-764 (2016)
The present work is concerned with the photodegradation and photostabilization of poly(3-hydroxybutyrate) (PHB) biopolymer. Two commercial grades of PHB were investigated, containing of 4.0% and 6.2% of hydroxyvalerate (HV) comonomer, named PHB1 and
Externí odkaz:
https://doaj.org/article/9b2862405f8e4e078d9c63af0f4e3c17
Autor:
Ana Beatriz de Sousa Barros, Rômulo de Freitas Farias, Danilo Diniz Siqueira, Carlos Bruno Barreto Luna, Edcleide Maria Araújo, Marcelo Silveira Rabello, Renate Maria Ramos Wellen
Publikováno v:
Materials, Vol 13, Iss 12, p 2844 (2020)
The aim of the present work is to evaluate the effect of NaOH solution as a stress cracking agent on the thermal and tensile properties of PET and PET/ZnO composites. The solutions were applied during tensile testing and the effects were monitored by
Externí odkaz:
https://doaj.org/article/cb4417d7d6884df391296d46269ddf53
Autor:
Renate Maria Ramos Wellen, Marcelo Silveira Rabello, Inaldo Cesar Araujo Júnior, Guilhermino José Macedo Fechine, Eduardo Luis Canedo
Publikováno v:
Polímeros, Vol 25, Iss 3, Pp 296-304 (2015)
AbstractWe studied the crystallization and melting phenomena of poly (3- hydroxybutyrate) (PHB), a biodegradable and biocompatible semi-crystalline thermoplastic, obtained from renewable resources. Its high crystallinity motivated several studies on
Externí odkaz:
https://doaj.org/article/e4bf4a59be9f4b65a443a03415254841
Autor:
Renate Maria Ramos Wellen, Eduardo Luís Canedo, Camila Augusta Ventura Lima, Inaldo Cesar Araújo Júnior, Yêda Medeiros Bastos de Almeida, Marcelo Silveira Rabello
Publikováno v:
Materials Research, Vol 18, Iss 2, Pp 235-239 (2015)
Mechanical properties, morphology and nonisothermal crystallization of poly(3-hydroxybutyrate) (PHB) and blends of PHB and polystyrene (PS) were studied by tensile tests, scanning electron microscopy (SEM) and differential scanning calorimetry (DSC).
Externí odkaz:
https://doaj.org/article/1e333f191e0846f9a83fd33d4df24483
Autor:
Rômulo Freitas Farias, Eduardo Luís Canedo, Renate Maria Ramos Wellen, Marcelo Silveira Rabello
Publikováno v:
Materials Research, Vol 18, Iss 2, Pp 258-266 (2015)
Environmental stress cracking (ESC) is one of the most important causes of polymer premature failure, occurring when a combination of mechanical load and an aggressive fluid is applied. The phenomenon is well know by polymer producers and product des
Externí odkaz:
https://doaj.org/article/e7cf25d8eb9b4573966dbc2097dc541e
Autor:
Edvânia Trajano Teófilo, Emanuela Santos Silva, Suédina Maria Lima Silva, Marcelo Silveira Rabello
Publikováno v:
Polímeros, Vol 24, Iss 6, Pp 694-702 (2014)
O presente estudo investiga a falha por stress cracking em polímeros contendo argila montmorilonítica. Ensaios de tração e de relaxação de tensão foram conduzidos para avaliar a resistência ao stress cracking do PET puro e dos híbridos PET/a
Externí odkaz:
https://doaj.org/article/5e1b900287ed45138735f395c70285e7
Publikováno v:
Química Nova, Vol 29, Iss 4, Pp 674-680 (2006)
Samples of polypropylene (PP) and low-density polyethylene (LDPE) were submitted to ultraviolet radiation, in the natural environment and also in the laboratory. Chemical modifications were quantified by the carbonyl index (CI), mechanical properties
Externí odkaz:
https://doaj.org/article/4b637c096815496683dbdc90b064861e
Autor:
Bianca Maria Rodrigues
Publikováno v:
Biblioteca Digital de Teses e Dissertações da USP
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
A crescente produção de polímeros e a geração de resíduos destes materiais têm sido motivo de preocupação em todos os países e, consequentemente, gerando a necessidade de encontrar processos viáveis que permitam a reutilização ou recicla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21bf716797e6c9d9c02eec26d725735e
