Abstract:New types of polyurethanes were prepared by reacting diisocyanates and formiated soy polyols with different OH functionalities. Thermal properties and degradation kinetics were investigated by TGA. All prepared PU's showed at least two-weight loss steps, the first one, around 210 °C. Thermal stability of these PUs depends strongly on urethane groups per unit volume and an increase in the weight loss was observed as a result of the increased amount of urethane groups. Degradation kinetics behavior of the soy-ba… Show more
“…LAR9000 shows two major temperatures of maximum degradation: the first at 242 ºC and the second at 457 ºC. The first step starts around 200ºC and can be ascribed to the -N-CO-NH-segment degradation, with the formation of CO 2 [54,55], and the later one starts around 360ºC and corresponds to the effective degradation of LAR9000.…”
“…LAR9000 shows two major temperatures of maximum degradation: the first at 242 ºC and the second at 457 ºC. The first step starts around 200ºC and can be ascribed to the -N-CO-NH-segment degradation, with the formation of CO 2 [54,55], and the later one starts around 360ºC and corresponds to the effective degradation of LAR9000.…”
“…However, the incorporation of CNT or CNT‐AgNP hybrid filler in NR composites gave another decomposition peak in the temperature range 200–300 °C. This might be due to the decomposition of functional groups on CNT surfaces . In Table , it is seen that the t 2 was lowered by the addition of CNT or CNT‐AgNP hybrid filler.…”
“…The DTG curves of the polyurethanes P1–P4 displayed maximum peaks but also shoulder peaks. The stage of degradation of the polyurethanes at about 200–400°C was a result of the depolymerization of the urethane groups …”
Section: Resultsmentioning
confidence: 99%
“…The stage of degradation of the polyurethanes at about 200-4008C was a result of the depolymerization of the urethane groups. [42][43][44] Ether bonds are thermally labile and prone to oxidation. 45 The CAO bond is a weak bond in the macromolecular chain and, for that reason, is very susceptible to breaking down at low temperatures.…”
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