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- W2056531541 abstract "Polyurethane elastomers based on castor oil or polybutadiene liquid hidroxyl (PBLH), as well as polyurethane composites reinforced with coir or sisal fibers at different proportions: 5, 10 and 20% w/w were prepared. The thermal behavior of the samples was analyzed by thermogravimetry (TG/DTG). TG/DTG curves showed two decomposition stages, except samples from castor oil with three decomposition stages (Tonset 257°C). The PU from PBLH presented a principal degradation at around 400°C, but with 15% weight loss at 250°C and the composites exhibited first decomposition stage at around 290°C. MDSC thermal profiles for PBLH PU presented one transition, occurring at the glass transition temperature (Tg) 73.8°C, two transitions in castor oil PU Tg: −1.6 and 62.7°C, and three transitions for composites from sisal Tg: −52.9°C, 66.7 and 122°C. These transitions suggest soft and hard segments." @default.
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- W2056531541 date "2000-08-01" @default.
- W2056531541 modified "2023-10-16" @default.
- W2056531541 title "Properties of polyurethane elastomers and composites by thermal analysis" @default.
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- W2056531541 doi "https://doi.org/10.1016/s0040-6031(00)00403-2" @default.
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