Registration Number
0222U001982,
0121U110142
, R & D reports
Title
Joint effect of temperature and structure on catalytic acidolysis of epichlorohydrin
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Head
Shved Olena M., Доктор хімічних наук
Registration Date
08-02-2022
Organization
Vasyl' Stus Donetsk National University
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Using methods of chemical kinetics and quantum chemical modeling, the kinetics, regioselectivity and mechanism of catalysis the reaction of the ring opening of 2-(chloromethyl)oxirane by benzoic acid in the presence of organic bases were investigated. The model reaction was carried out using 2-(chloromethyl)oxirane as both reagent and solvent at temperatures of 303-333 K. Rate constants and activation parameters of the ring opening were determined for the overall reaction and for the formation of the isomeric “normal” and “abnormal” products. It was established by quantum chemistry methods that the rate limiting stage is the attack of the benzoate anion on the carbon atoms of the ring of 2-(chloromethyl)oxirane. It has been found that catalysts that are weak nucleophilic bases increase the reaction regiospecificity by increasing the contribution of the SN2 pathway.
The effect of the filler – the nanoparticles of zirconium (IV) oxide on the thermal stability of composites based on epoxy resin ED-20, isomethyltetrahydrophthalic anhydride, complex catalyst, and plasticizer were studied. The resistance of the obtained polymers and composites to thermal oxidative degradation was evaluated by derivatography. Evaluation of the effectiveness of the influence of ZrO2 on the curing was carried out according to the data of differential scanning calorimetry (DSC) by the Kissinger method. It was established the optimal content of ZrO2 in the composition.
Product Description
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Bakhalova Ievheniia A.
Bespal'ko Yuliya M.
Shpanko Ihor Vasylovych
Yutilova Kseniia S.
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2022-03-09
