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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
22/12/1999 |
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Autoria: |
MALMONGE, L. F.; MATTOSO, L. H. C. |
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Afiliação: |
UNESP-Campus de Ilha Solteira; EMBRAPA-CNPDIA. |
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Título: |
Structural studies on blends of PVDF and doped poly(o-methoxyaniline). |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 20., jun. 1997, Caxambu, MG. Resumos... São Paulo: Sociedade Brasileira de Fisica, 1997. |
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Páginas: |
p. 316. |
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Idioma: |
Inglês |
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Conteúdo: |
Blends of poly (o-methoxyaniline)-POMA and poly(vinnylidene fluoride)- PVDF exhibiting electrical conductivity with low contents of conducting polymer were studied by x-ray diffraction, scanning electron microscopy, thermal gravimetric analysis and conductivity measurements. Flexible, free-standing films were prepared from solution for the these blents in optimized conditions of temperature, solvent and doping. POMA doped with toluenesulfonic acid (TSA) and PVDF were both dissolved in N, N-dimethylacetamide (DMA), at room temperature and 70 graus C, repectively. The solutions were mixed at various compositions of POMA-TSA prior to casting. The blends presented a transition in morphology from spherulites, peculiar of pure PVDF, to fibrils (charcteristic of polyanilines) for increasing POMA-TSA content. The conductivity of blends containing 25% of POMA remained practically unchanged in the range from 10 elevado a menos 3 to 10 elevado a menos 4 S/cm for long periods (500 hours), event after treatment at temperatures of 70 graus C and 90 graus. Thermal analysis demonstrated that no mass loss was observed for the these blends up to temperatures as high as the melting point of PVDF. The crystalline structure characteristic of PVDF is pratically unaffect by the presence of up to 25% of POMA-TSA in the blend. For higher POMA-TSA contents the crystalline diffraction peaks of the conducting polymer begin to apper being of PVDF vanish. These results are consistent with the morphological transsition detected. the effect of blending and thermal treatment on the structure and morphological transition detected. The effect of blendin and thermal treatment on the structure and morphology of the polymers is discussed. MenosBlends of poly (o-methoxyaniline)-POMA and poly(vinnylidene fluoride)- PVDF exhibiting electrical conductivity with low contents of conducting polymer were studied by x-ray diffraction, scanning electron microscopy, thermal gravimetric analysis and conductivity measurements. Flexible, free-standing films were prepared from solution for the these blents in optimized conditions of temperature, solvent and doping. POMA doped with toluenesulfonic acid (TSA) and PVDF were both dissolved in N, N-dimethylacetamide (DMA), at room temperature and 70 graus C, repectively. The solutions were mixed at various compositions of POMA-TSA prior to casting. The blends presented a transition in morphology from spherulites, peculiar of pure PVDF, to fibrils (charcteristic of polyanilines) for increasing POMA-TSA content. The conductivity of blends containing 25% of POMA remained practically unchanged in the range from 10 elevado a menos 3 to 10 elevado a menos 4 S/cm for long periods (500 hours), event after treatment at temperatures of 70 graus C and 90 graus. Thermal analysis demonstrated that no mass loss was observed for the these blends up to temperatures as high as the melting point of PVDF. The crystalline structure characteristic of PVDF is pratically unaffect by the presence of up to 25% of POMA-TSA in the blend. For higher POMA-TSA contents the crystalline diffraction peaks of the conducting polymer begin to apper being of PVDF vanish. These results are consistent with the morphologic... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02228naa a2200145 a 4500
001 1027268
005 1999-12-22
008 1997 bl --- 0-- u #d
100 1 $aMALMONGE, L. F.
245 $aStructural studies on blends of PVDF and doped poly(o-methoxyaniline).
260 $c1997
300 $ap. 316.
520 $aBlends of poly (o-methoxyaniline)-POMA and poly(vinnylidene fluoride)- PVDF exhibiting electrical conductivity with low contents of conducting polymer were studied by x-ray diffraction, scanning electron microscopy, thermal gravimetric analysis and conductivity measurements. Flexible, free-standing films were prepared from solution for the these blents in optimized conditions of temperature, solvent and doping. POMA doped with toluenesulfonic acid (TSA) and PVDF were both dissolved in N, N-dimethylacetamide (DMA), at room temperature and 70 graus C, repectively. The solutions were mixed at various compositions of POMA-TSA prior to casting. The blends presented a transition in morphology from spherulites, peculiar of pure PVDF, to fibrils (charcteristic of polyanilines) for increasing POMA-TSA content. The conductivity of blends containing 25% of POMA remained practically unchanged in the range from 10 elevado a menos 3 to 10 elevado a menos 4 S/cm for long periods (500 hours), event after treatment at temperatures of 70 graus C and 90 graus. Thermal analysis demonstrated that no mass loss was observed for the these blends up to temperatures as high as the melting point of PVDF. The crystalline structure characteristic of PVDF is pratically unaffect by the presence of up to 25% of POMA-TSA in the blend. For higher POMA-TSA contents the crystalline diffraction peaks of the conducting polymer begin to apper being of PVDF vanish. These results are consistent with the morphological transsition detected. the effect of blending and thermal treatment on the structure and morphological transition detected. The effect of blendin and thermal treatment on the structure and morphology of the polymers is discussed.
700 1 $aMATTOSO, L. H. C.
773 $tIn: ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 20., jun. 1997, Caxambu, MG. Resumos... São Paulo: Sociedade Brasileira de Fisica, 1997.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 1.536 | |
| 55. |  | JOSEPH, K.; MATTOSO, L. H. C. Sisal fibre reinforced polymer composites: status and future. In: INTERNATIONAL SYMPOSIUM ON NATURAL POLYMERS AND COMPOSITES-ISNaPol/2000, 3.; WORKSHOP ON PROGRESS IN PRODUCTION AND PROCESSING OF CELLULOSIC FIBRES AND NATURAL POLYMERS, 2000, São Pedro. Natural polymers and composites. São Carlos: Embrapa Instrumentação Agropecuária: USP-IQSC; Botucatu: UNESP, 2000. p. 333-343. Editors: Luiz Henrique Capparelli Mattoso, Alcides Leão, Elisabete Frollini.| Biblioteca(s): Embrapa Instrumentação. |
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| 56. | | PARIS, E. C.; MATTOSO, L. H. C. Síntese e caracterização de filmes finos de ZnO depositados por Dip-coating e evaporação por canhão de elétrons. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 8, 2014, Juiz de fora. Anais... São Carlos: Embrapa Instrumentação; Campo Grande: Embrapa Gado de Corte; Juiz de Fora: Embrapa Gado de Leite, 2014. p. 62-64. Editores: Maria Alice Martins, Humberto de Mello Brandão, Marlene de Barros Coelho, Daniel Souza Corrêa, Caue Ribeiro, Luiz Henrique Capparelli Mattoso.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 1.536 | |
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