Abstract
A series of new porous aromatic frameworks (PAA-VTMS) co-cured by diethynylbenzene (DEB) and vinyltrimethoxysilane (VTMS) have been described. Thermally treated PAA-VTMS were also investigated. When the ratio of DEB to VTMS was 1:1 (PAA-VTMS-4), it showed characteristic pores with uniform diameter, confirmed by scanning electron microscope (SEM) and transmission electron microscopy (TEM) analyses. The surface area of PAA-VTMS-4 was up to 457 m2/g and its pore size was 7 nm, related to the hyper-cross-linked structure with plentiful benzene units. The co-cured PAA-VTMS samples whose DEB/VTMS ratios were higher or less than 1:1 showed low surface area. CO2 uptake of PAA-VTMS-4 was 83 cm3/g at 0 °C and 72 cm3/g at 25 °C. The temperature of 5% weight loss of PAA-VTMS-4 was 388 °C in nitrogen and 346 °C in air. The surface area of the thermally treated sample (OPAA-VTMS-4) was decreased, but its CO2 uptake was as high as 115 cm3/g at 0 °C and 105 cm3/g at 25 °C. The OPAA-VTMS-4 sample almost did not decompose in N2, and the temperature of its 5% weight loss was 450 °C in air. It showed that PAA-VTMS with its new porous aromatic framework can be used at high temperature.
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This work was supported by the National Natural Science Foundation of China (contract Grant Number 51003030).
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Yu, X., Yu, R., Li, Q. et al. Porous aromatic frameworks of co-cured diethynylbenzene (DEB) and vinyltrimethoxysilane (VTMS) with good thermo-oxidative stability. Iran Polym J 26, 413–421 (2017). https://doi.org/10.1007/s13726-017-0530-4
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DOI: https://doi.org/10.1007/s13726-017-0530-4