Effects of the biodegradation on biodegradable polymer blends and polypropylene

The large use of plastics in the world generates a large amount of waste which persists around 200 years in the environment. To minimize this effect is important to search some new polymer materials: the blends of biodegradable polymers with synthetic polymers. It is a large area that needs an Intensive research to investigate the blends properties and its behavior face to the different treatments to aim at the blodegradation. The blends used In this work are: some blodegradable polymers such as: poly(hydroxybutyrate) (PHB) and poly(s-polycaprolactone) (PCL) with a synthetic polymer, polypropylene (PP), in lower concentration. These blends were prepared using an internal mixer (Torque Rheometer), and pressed. These films were submitted to fungus biotreatment. The films analyses will be carried out by Fourier Transform Infrared (FTIR), UV-Vis absorption (UV-Vis), Scanning Electronic Microscopy (SEM), DSC and TGA. © 2008 American Institute of Physics.

Filling of simulated lateral canals with gutta-percha or thermoplastic polymer by warm vertical compaction

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Use of scrap tire rubber in place of SBS in modified asphalt as an environmentally correct alternative for Brazil

Reusing scrap tires has become a worldwide challenge, especially due to the great difficulty in finding ecologically and economically feasible ways to dispose of them. This has led to the creation of specific programs and legislation for reusing scrap tires. Research has shown that a certain percentage of scrap tire rubber can be added to asphalt compositions, and this has become a worldwide practice. This paper describes the properties of four asphalt compositions modified with scrap tire rubber (STR) prepared in the laboratory. These properties are then compared with those of asphalt modified with styrene butadiene styrene (SBS), a synthetic polymer and one of the most common modifiers, to verify the feasibility of using scrap tire rubber as a substitute for SBS. The scope of this study does not include an analysis of how STR affects end-of-life asphalt. The main findings indicate that STR is a potential substitute of SBS in paving material, and although it does not meet some of the standard specifications when compared with SBS, these issues can be overcome by proper care during storage and transportation. The substitution of SBS by STR also showed the potential for about 10% in expenditure savings. (C) 2012 Elsevier Ltd. All rights reserved.

Biotransformation of poly (epsilon-caprolactone) and poly (vinyl chloride) blend

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Biodegradação de polipropileno (PP), de polihidroxibutirato (PHB) e da blenda PP/PHB (1:1) por microrganismos de rio poluído e efluente bruto de refinaria de petróleo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Blendas de PVC/PCL foto/termo e biotratadas com fungos de solo (Phanerochaete chrysosporium e Aspergillus fumigatus)

Pós-graduação em Ciências Biológicas (Microbiologia Aplicada) - IBRC

Syzygium cumini (L.) Skeels: avaliação da qualidade, estudo morfo-anatômico, estudo da atividade antimicrobiana, conservante, genotóxica, mutagênica, citotóxica e incorporação em formulações cosméticas para uso tópico

Pós-graduação em Ciências Farmacêuticas - FCFAR

Simulação de poli(etileno glicol) em água por dinâmica molecular

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Water activity of aqueous solutions of ethylene oxide-propylene oxide block copolymers and maltodextrins

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Reflexos da clarificação do caldo de cana com moringa sobre compostos inorgânicos do açúcar VHP

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Nanocomposites of Styrene-Butadiene Rubber and Synthetic Anatase Obtained by a Colloidal Route and Their Photooxidation

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Transparent organic-inorganic nanocomposites membranes based on carboxymethylcellulose and synthetic clay

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Extraction of natural red colorants from the fermented broth of Penicillium purpurogenum using aqueous two-phase polymer systems

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)