Thermosets
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Development of a Simple Dielectric Analysis Module for Online Cure Monitoring of a Commercial Epoxy Resin Formulation
The final properties of thermosets are strongly dependent on their curing process. Therefore, closely monitoring this process is necessary to assure the manufacturing quality and productivity. In this way, the aim of this study is to develop a simple dielectric module for monitoring and optimizing the industrial curing cycle of thermosets. The module is base
Mat. Res.. Publicado em: 27/07/2017
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2. Sodium lignosulphonate as agent of modification of lignocellulosic fiber surface and formulation of phenolic thermoset / Lignosulfonato de sódio como agente de modificação da superfície de fibras lignocelulósicas e da formulação de termorrígido fenólico
Due to the great current interest in biocomposites because of both the use of lignocellulosic fibers as reinforcers of polymer matrices and the production of matrices prepared from renewable raw material, this study has sought to improve the properties of phenolic thermosets using sodium lignosulphonate as a macromonomer, and the insertion of sisal fibers, e
Publicado em: 2010
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3. Biocomposites of lignin-, tannin- and glyoxal- based polymeric matrices reinforced with natural fibers / Biocompósitos a partir de matrizes poliméricas baseadas em lignina, tanino e glioxal reforçadas com fibras naturais
The present study aimed at developing biocomposites combining polymeric matrices and reinforcement agents, employing the highest possible proportion of materials obtained from natural sources. Phenolic resins are widely known and used due to their excellent properties, such as dimensional and thermal stability, flame resistance and chemical resistance. Howev
Publicado em: 2010
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4. Avaliação da tensão interfacial dinâmica em revestimentos epóxi do tipo DGEBA modificada com agentes de cura à base de amina. / Evaluation of dynamic interfacial tension-type DGEBA epoxy coatings modified with curing agents based on amine.
As tubulações de aço carbono, para a produção e transporte de produtos químicos, apresentam limitações como resistência à ação da corrosão, sob ação do calor, causando desgaste. Por esse motivo se faz o uso de revestimentos que reduzem o contato da superfície com o meio corrosivo. No entanto, os revestimentos usados para o escoamento de fluí
Publicado em: 2006
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5. Fibras lignocelulósicas como agente de reforço de compósitos de matriz fenólica e lignofenólica / Lignocellulosic fibers as reinforcing agents in lignophenolic and phenolic matrix composites
In this work, lignocellulosic fibers from different sources (banana tree and coconut) were used as reinforcing agents in the preparation of phenolic and lignophenolic matrix composites. The phenol used in the matrix formulation was substituted both partially and totally by lignin, extracted from sugarcane bagasse by organosolv process, in the preparation of
Publicado em: 2006
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6. Influência da variação do tempo e da temperatura na cura de tintas: tinta pó epóxi e tinta líquida acrílico-epóxi. análise da dureza e da energia de conversão
The objective of this dissertation is to present a study of the influence of the time and temperature variation on the cure of thermosets paints. Two distinct systems were studied: acrylic-epoxy liquid paint and epoxy powder paint. The specimens were made out of metallic sheet. Afterwards, they were pretreated and soon after that they were painted by using a
Publicado em: 2003