Formula: C15H16OIn 2022, Ling, Meiqi;Yu, Kaifeng;Wang, Jian;Wang, Honghua;Nie, Heran;Wang, Zhipeng;Zhou, Guangyuan published 《Synthesis and pyrolysis mechanism of phenolphthalein poly(aryl ether sulfone) containing isopropyl groups》. 《Thermochimica Acta》published the findings. The article contains the following contents:
A novel phenolphthalein poly(aryl ether sulfone) polymer containing iso-Pr groups (iPrPESC) has been successfully synthesized by SN2 aromatic nucleophilic polycondensation reaction. The pyrolysis mechanism and behavior of iPrPESC were investigated by thermogravimetry coupled with Fourier transform IR spectroscopy and pyrolysis combined with gas chromatog./mass spectrometry. TG-FTIR and Py-GC/MS were used to identify the thermal decomposition products and to determine the possible thermal degradation mechanism. The main mechanism for iPrPESC was one-stage pyrolysis involving main-chain random scission, and the major products of SO2 and phenol were released from the sulfone and ether groups in iPrPESC. The thermal degradation activation energy of iPrPESC was calculated to be 151 ± 4 and 139 ± 4 kJ mol-1 by the Flynn-Wall-Ozawa and Kissinger methods, resp., which were much lower than that of phenolphthalein poly(aryl ether sulfone). Furthermore, introduction of iso-Pr groups on the main chain can significantly reduce the char yield. The experimental procedure involved many compounds, such as 4-(2-Phenylpropan-2-yl)phenol (cas: 599-64-4) .
4-(2-Phenylpropan-2-yl)phenol(cas:599-64-4) is a natural product found in Panax ginseng.Formula: C15H16O 4-(2-Phenylpropan-2-yl)phenol is a useful reagent for preparing and characterizing aromatic polyphosphonates as high refractive index polymers.
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