Abstract
Using bisphenol A (BPA) and isophthalaldehyde (IPD) as comonomers, based on open system and solution polycondensation method, phenolic resin was prepared by microwave. The reversible thermochromic composite solution polymerized butadiene styrene rubber film was prepared by resin as chromogenic agent. The resin was tested by gel permeation chromatography, 1H and 13C NMR spectrometers, thermogravimetric analyzer, and thermal analyzer, etc. The composite film was tested by thermogravimetric analyzer, thermal analyzer, spectrophotometer, and polarizing microscope, etc. The factors affecting the thermochromic properties, thermal stability, thermal recyclability stability and microscopic morphology of the composite film were studied. The results indicate that BPA-IPD is the 2,6-monosubstituted bisphenol A isophthalaldehyde phenolic resin with M–n of 1.150 × 103 g mol–1 and PDI of 1.004. Therefore, the number of monomers in molecular chain containing BPA and IPD are 3 and 3, respectively. When the mass ratio of crystal violet lactone, resin, mixed alcohols (cetyl alcohol and octadecanol) and solution polymerized butadiene styrene rubber is 1 : 1.5 : 30 : 50, i.e., 0.0075 : 0.011 : 0.23(0.14 : 0.09) : 0.38(g), the composite film is obtained by salivation method. The total color difference (ΔE) of composite film is about 90, and its absorption/scattering color depth difference [Δ(K/S)] values are averagely 20 and 40 at visible light zone of 480– 600 and 600–660 nm at the low temperature region (10–33°С) of phase change during constant speed cooling, respectively. The composite film has good thermal stability and recyclability stability.
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This work was partially supported by the National Science Foundation of China (grants 51873232), and Xuzhou Science and Technology Plan Project (grants KC21286).
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Wang, X., Dong, L., Wang, S. et al. Study on 2,6-Monosubstituted Bisphenol A Isophthalaldehyde Phenolic Resin and Its Reversible Thermochromic Composite SSBR Film. Russ J Appl Chem 96, 108–117 (2023). https://doi.org/10.1134/S1070427223010147
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DOI: https://doi.org/10.1134/S1070427223010147