Thermal characterization of lamellar titanes |
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| Authors: | V. A.?Cardoso,L. M.?Nunes,J. C. O.?Santos,I. M. G.?Santos,M. M.?Concei&# &# o,J. R.?Santos Jr.,A. G.?Souza |
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| Affiliation: | (1) Departamento de Química, CCEN, Universidade Federal da Paraíba, Campus I, 58059-900, Joăo Pessoa, PB, Brazil;(2) Departamento de Química, CCEN, Universidade Federal da Paraíba, Campus I, 58059-900, Joăo Pessoa, PB, Brazil;(3) Departamento de Química, CCT, Universidade Estadual da Paraíba, Campus I, Bodocongó, 58109-790, Campina Grande, PB, Brazil;(4) Departamento de Química, CCEN, Universidade Federal da Paraíba, Campus I, 58059-900, Joăo Pessoa, PB, Brazil;(5) Departamento de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, 59072-970, Natal, RN, Brazil;(6) Departamento de Química, Universidade Federal do Piauí, Teresina, PI, Brazil;(7) Departamento de Química, CCEN, Universidade Federal da Paraíba, Campus I, 58059-900, Joăo Pessoa, PB, Brazil |
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| Abstract: | Summary Sugar cane bagasse lignin (SCBL) was extracted with formic acid (FA) from a sugar and alcohol factory residue, and used for blends preparation with polyvinylpyrrolidone (PVP). Casting from DMSO and FA solutions were used as preparation procedure. PVP and PVP/SCBL blends were also irradiated with ultraviolet light (Hg lamp). Blend formation and irradiation effects were examined through thermogravimetric analysis (TG) and infrared spectroscopy (FTIR). Results suggest a greater interaction between PVP and SCBL chains in PVP/SCBL 95/5 cast from DMSO and in the 95/5 and 90/10 blends cast from FA. Pure PVP shows a thermal stability decrease due to irradiation and this effect is minimized in the PVP/SCBL blends. The initial stage of the thermal decomposition of PVP is anticipated by the SCBL incorporation. |
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| Keywords: | DTA thermogravimetry titanates |
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