Abstract

The polymerization of acrylonitrile under the action of the new initiating system 1.4-diazabicyclo[2.2.2]octane–ethylene oxide is studied. The polymerization initiated by this system is accompanied by the occurrence of intra- and intermolecular chain transfer to the polymer. It is found that cyclic ethers, such as ethylene oxide and tetrahydrofuran, facilitate the reaction of chain transfer, acting as catalysts, as confirmed by quantum chemical calculations. The study of the thermal behavior of the synthesized hyperbranched polyacrylonitrile samples in the temperature range of 175–350°C shows that heat release for these samples begins at lower temperatures and proceeds in a wider temperature range and with a lower intensity compared to a linear polymer.

中文翻译：

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基于双环叔胺和环氧乙烷的新引发体系作用下超支化聚丙烯腈形成的研究

摘要

研究了在新的引发体系1.4-二氮杂双环[2.2.2]辛烷-环氧乙烷的作用下丙烯腈的聚合。该系统引发的聚合反应伴随着分子内和分子间链转移到聚合物上。如量子化学计算所证实的，发现环醚，例如环氧乙烷和四氢呋喃，促进链转移的反应，充当催化剂。对合成的超支化聚丙烯腈样品在175-350°C温度范围内的热行为的研究表明，与线性聚合物相比，这些样品的放热始于较低的温度，并在较宽的温度范围内以较低的强度进行。