In the present work, the reprocessability of thermosetting polythiourethanes via supercritical CO₂ foaming was explored. Firstly, the maximum crosslinking density susceptible to be foamed was determined employing samples with a crosslinking density between 4•10⁻⁴ and 7.4•10⁻⁵ mol of crosslinking bonds/g of sample. The foaming conditions explored were 150 bar and 1 h of saturation time with supercritical CO₂, and a temperature window of 90 – 130 ºC. After this test, it was observed that, for the polymers synthesized, the maximum amount of crosslinking density susceptible to be foamed was 1.5•10⁻⁴ mol of crosslinking bonds/g of sample. This sample was selected as the base sample to perform a deepest study, complemented by a statistical analysis of the results obtained, were the influence of pressure and temperature on the foamability of thermosetting polythiourethanes was explored. After this study, it was concluded that the pressure was the foaming variable with the highest influence on the foam’s properties, this influence being powerful enough to be statistically significant in all cases, while the influence of temperature was only significant in the case of expansion ratio.

在目前的工作中，探索了通过超临界 CO _{2发泡的热固性聚硫氨酯的再加工性。}^{首先，使用交联密度为4•10 -4}至7.4•10 ^-5 mol交联键/g样品的样品测定易发泡的最大交联密度。探索的发泡条件是 150 巴和 1 小时的超临界 CO ₂饱和时间，以及 90 – 130 ºC 的温度窗口。在该测试之后，观察到，对于合成的聚合物，易于发泡的最大交联密度为1.5•10 ^-4交联键的摩尔数/克样品。选择该样品作为基础样品进行最深入的研究，并辅以对所得结果的统计分析，探索压力和温度对热固性聚硫氨酯发泡性的影响。经过这项研究，得出结论，压力是对泡沫性能影响最大的发泡变量，这种影响足以在所有情况下具有统计显着性，而温度的影响仅在膨胀比的情况下显着.