2002
DOI: 10.1590/s0100-46702002000200022
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Avaliação por espestroscopia no infravermelho da microestrutura de poliuretano baseado em resina polibutadiênica hidroxilada

Abstract: Este trabalho apresenta uma avaliação da microestrutura ou seja, dos teores dos isômeros 1,4-cis, 1,4-trans e 1,2-vinil do segmento flexível de um poliuretano (PU) preparado a partir de resina polibutadiênica hidroxilada (PBLH), por meio da análise no infravermelho empregando-se a técnica de pastilha com brometo de potássio.

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“…Samples of uncrosslinked HTPB (M n = 2,900 g/mol) of predominant trans 1,4 structure (Takahashi and Diniz, 2002) were supplied by Petroflex (Brazil) containing 1% w/w of BHT (2,6-di(tert-butyl)hydroxytoluene, CA index name as 2,6-bis(1,1-dimethylethyl)-4-methyl-phenol). The material was maintained in tightly closed vessels at room temperature until they were used.…”
Section: Methodsmentioning
confidence: 99%
“…Samples of uncrosslinked HTPB (M n = 2,900 g/mol) of predominant trans 1,4 structure (Takahashi and Diniz, 2002) were supplied by Petroflex (Brazil) containing 1% w/w of BHT (2,6-di(tert-butyl)hydroxytoluene, CA index name as 2,6-bis(1,1-dimethylethyl)-4-methyl-phenol). The material was maintained in tightly closed vessels at room temperature until they were used.…”
Section: Methodsmentioning
confidence: 99%