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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
18/07/2001 |
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Data da última atualização: |
10/10/2009 |
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Autoria: |
MULLER, A. |
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Título: |
Metereology. |
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Edição: |
3.ed. |
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Ano de publicação: |
1976 |
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Fonte/Imprenta: |
Columbus, Ohio: C.E. Merrill, 1976. |
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Páginas: |
155p. |
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Descrição Física: |
il. |
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Idioma: |
Inglês |
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Conteúdo: |
The air arounds us. The atmosphere's energy. Air in motion. Circulation patterns. Climate. Weather forecasting and modification. |
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Palavras-Chave: |
Atmosphere. |
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Thesagro: |
Ar; Atmosfera; Clima; Meteorologia. |
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Thesaurus Nal: |
air; climate; meteorology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00618nam a2200229 a 4500
001 1389562
005 2009-10-10
008 1976 bl uuuu 00u1 u #d
100 1 $aMULLER, A.
245 $aMetereology.
250 $a3.ed.
260 $aColumbus, Ohio: C.E. Merrill$c1976
300 $a155p.$cil.
520 $aThe air arounds us. The atmosphere's energy. Air in motion. Circulation patterns. Climate. Weather forecasting and modification.
650 $aair
650 $aclimate
650 $ameteorology
650 $aAr
650 $aAtmosfera
650 $aClima
650 $aMeteorologia
653 $aAtmosphere
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
23/03/2005 |
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Data da última atualização: |
27/01/2010 |
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Autoria: |
GRÓRIO JÚNIOR, R.; MALMONGE, L. F.; FERREIRA, G. F. L.; SANTOS, W. N.; MATTOSO, L. H. C. |
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Título: |
Comportamento dielétrico de blendas PVDF/POMA com baixa porcentagem de poma dopada. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE POLÍMEROS. 7., nov. 2003., Belo Horizonte, MG. Anais... São Carlos: Associação Brasileira de Polímeros, 2003. p. 55-56. |
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Idioma: |
Português |
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Conteúdo: |
The real and imaginary components of the complex pennittivity of blends of poly(vinylidene fluoride) (PVDF) with Poly(o-methoxyaniline) (POMA) doped with toluenosulfonic acid (TSA) containing 1,2.5 and 5wt% POMA-TSA were deternlined in the frequency interval between 100Hz and 3MHz and in the temperature range from -120 up to 120°C. lt was observed that the values of and have an enhanced increase with the content of POMA-TSA and temperature in the region of frequencies below 10kHz. This effect decreases with the frequency and it was attributed to the interfacial polarization, which is caused by the blend heterogeneity, which in turn is formed by conductive POMA-TSA agglomerates dispersed in an insulating matrix of PVDF. The equation of Maxwell-Garnett, modified by Cohen, has been used to evaluate conductivity behavior ofPOMA-TSA in the blends. lt was observed a strong decrease in the POMA-TSA conductivity in the blend, which is bigger the lower is the POMA-TSA content in the blend. This decrease should be caused either by the POMA dedoping during the process of the blend preparation or by its dispersion into the insulating matrix. |
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Palavras-Chave: |
Blendas de polímeros convencionais; Filmes; Polímeros; POMA. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01868naa a2200217 a 4500
001 1028897
005 2010-01-27
008 2003 bl --- 0-- u #d
100 1 $aGRÓRIO JÚNIOR, R.
245 $aComportamento dielétrico de blendas PVDF/POMA com baixa porcentagem de poma dopada.
260 $c2003
520 $aThe real and imaginary components of the complex pennittivity of blends of poly(vinylidene fluoride) (PVDF) with Poly(o-methoxyaniline) (POMA) doped with toluenosulfonic acid (TSA) containing 1,2.5 and 5wt% POMA-TSA were deternlined in the frequency interval between 100Hz and 3MHz and in the temperature range from -120 up to 120°C. lt was observed that the values of and have an enhanced increase with the content of POMA-TSA and temperature in the region of frequencies below 10kHz. This effect decreases with the frequency and it was attributed to the interfacial polarization, which is caused by the blend heterogeneity, which in turn is formed by conductive POMA-TSA agglomerates dispersed in an insulating matrix of PVDF. The equation of Maxwell-Garnett, modified by Cohen, has been used to evaluate conductivity behavior ofPOMA-TSA in the blends. lt was observed a strong decrease in the POMA-TSA conductivity in the blend, which is bigger the lower is the POMA-TSA content in the blend. This decrease should be caused either by the POMA dedoping during the process of the blend preparation or by its dispersion into the insulating matrix.
653 $aBlendas de polímeros convencionais
653 $aFilmes
653 $aPolímeros
653 $aPOMA
700 1 $aMALMONGE, L. F.
700 1 $aFERREIRA, G. F. L.
700 1 $aSANTOS, W. N.
700 1 $aMATTOSO, L. H. C.
773 $tIn: CONGRESSO BRASILEIRO DE POLÍMEROS. 7., nov. 2003., Belo Horizonte, MG. Anais... São Carlos: Associação Brasileira de Polímeros, 2003. p. 55-56.
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Embrapa Instrumentação (CNPDIA) |
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