The effect of γ-radiation dosage on the thermal stability of the cross-linked acrylic polymer "Carbomer-140" (СRB) was investigated. The DTA, TGA and DTG curves show multistage processes occurring in different temperature ranges on heating CRB from 25 °C to 500 °C. The rates of thermal decomposition of CRB were determined in the temperature ranges of 40-110 °C, 180-260 °C, 260-330 °C, and 330-500 °C. In combination with results of electronic structure calculations, potential thermal destruction reactions were proposed for the indicated temperature ranges. The main reactions for thermal decomposition of CRB are formation of ketones and cyclic anhydrides with formation of unsaturated bonds in the macromolecule due to elimination of H₂O, CO₂, and CO, respectively, from the polymer chain. An increase in the radiation dose applied to CRB leads to a decrease in the post-radiation thermal stability of the polymer. During radiolysis, double bonds are formed and accumulate in the polymer, contributing to the thermal destruction of CRB. As a result, the higher the radiation dose, the higher the rate of post-radiation thermal destruction.

研究了γ-辐射剂量对交联丙烯酸聚合物“Carbomer-140”（СRB）热稳定性的影响。DTA、TGA 和 DTG 曲线显示了在将 CRB 从 25 °C 加热到 500 °C 时在不同温度范围内发生的多阶段过程。CRB 的热分解速率在 40-110 °C、180-260 °C、260-330 °C 和 330-500 °C 的温度范围内测定。结合电子结构计算的结果，提出了针对指定温度范围的潜在热破坏反应。CRB 热分解的主要反应是生成酮和环酐，由于 H ₂ O、CO _{2 的}消除，在大分子中形成不饱和键和 CO 分别来自聚合物链。施加到 CRB 的辐射剂量的增加导致聚合物的辐射后热稳定性降低。在辐射分解过程中，双键形成并在聚合物中积累，导致 CRB 的热破坏。因此，辐射剂量越高，辐射后热破坏率越高。