Buscar
Mostrando ítems 111-120 de 250
Comparative effects of two different crosslinkers on the properties of vegetable oil-based polyurethanes
(John Wiley & Sons Inc, 2020-06)
Thermoset polyurethanes (PUs) were prepared from a polyol derived from castor oil, 4,4′-methylene diphenyl diisocyanate (MDI) and different trifunctional low-molecular-weight crosslinkers, biobased glycerol (Gly) and ...
Obtenção e caracterização de compósito verde de casca de pinhão e poliuretana derivada do óleo de mamona
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Mecânica e de MateriaisUTFPR, 2017-12-13)
Polymeric composites reinforced with natural fibers are denominated green composites. Polymers comes from petroleum source, a non-biodegradable material and has volatile organic compounds, VOC, in its composition. Organic ...
Polímero derivado do óleo de mamona acrescido de cálcio, associado ou não a medula óssea autógena na reparação de falhas ósseas experimentais em coelhosCastor oil plant polymer with calcium associated or not to autogenous bone marrow in the repair of experimental bone gaps in rabbits
(Universidade Federal de Viçosa, 2017)
Physical and mechanical properties of a vegetable oil based nanocomposite
(Pergamon-Elsevier Science Ltd, 2018-01)
Nanocomposites films were prepared from a bio-based waterborne polyurethane and cellulose nanocrystals (CNCs) obtained from the sulfuric acid hydrolysis of cellulose nanofibers. The polyurethane used as matrix of the ...
Quantificação do linalol no óleo essencial da Aniba duckei Korstermans utilizando uma nova coluna capilar POLYH4-MD em Cromatografia Gasosa
(Sociedade Brasileira de Química, 2014)
Electrical properties of a composite of Polyurethane and ferroelectric ceramics
(1998-12-01)
Ferroelectric ceramic particles based on lead titanate zirconate (PZT) were dispersed in a polymer matrix based on castor oil. After the poling process, the pyroelectric activity of this composite was measured using a ...
Electrical properties of a composite of Polyurethane and ferroelectric ceramics
(1998-12-01)
Ferroelectric ceramic particles based on lead titanate zirconate (PZT) were dispersed in a polymer matrix based on castor oil. After the poling process, the pyroelectric activity of this composite was measured using a ...
Cytotoxicity and genotoxicity of natural resin-based experimental endodontic sealers
(2016-05-01)
Objectives: The development of endodontic sealers based on natural resins seems to be promising, given their improved biological properties. This study evaluated the cytotoxic and genotoxic effects of two experimental root ...
Avaliação da influencia da radiação ultravioleta nas propriedades mecânicas do compósito de sisal/poliuretano
(Universidade Tecnológica Federal do ParanáCuritibaBrasilGraduação em Engenharia MecânicaUTFPR, 2017-06-29)
Polymers derived from petroleum have source of nonrenewable raw material, long time of degradation in the environment and uses solvent in its synthesis. Biodegradable polymers, raw materials from renewable sources is an ...