## 3 Results
\begin{table}
\begin{tabular}{c c c c c} \hline
**Copolymeric Microsphere** & \begin{tabular}{c} _D(0.1)_ \\ (\(\upmu\)m)_ \\ \end{tabular} & \
\begin{tabular}{c} _D(0.5)_ \\ (\(\upmu\)m)_ \\ \end{tabular} &
\begin{tabular}{c} _D(0.9)_ \\ (\(\upmu\)m)_ \\ \end{tabular} & **Span** \\ \hline BMA-co-EGDMA\_1\_T & 94 & 132 & 164 & 0.530 \\ BMA-co-EGDMA\_1\_C & 98 & 141 & 179 & 0.574 \\ BMA-co-EGDMA\_4\_T & 89 & 138 & 171 & 0.592 \\ BMA-co-EGDMA\_4\_C & 101 & 147 & 184 & 0.565 \\ BMA-co-DVB\_1\_T & 68 & 95 & 101 & 0.347 \\ BMA-co-DVB\_1\_C & 70 & 97 & 128 & 0.598 \\ BMA-co-DVB\_4\_T & 64 & 92 & 114 & 0.543 \\ BMA-co-DVB\_4\_C & 73 & 100 & 136 & 0.624 \\ BMA-co-TRIM\_1\_T & 80 & 162 & 181 & 0.623 \\ BMA-co-TRIM\_1\_C & 98 & 174 & 201 & 0.592 \\ BMA-co-TRIM\_4\_T & 76 & 168 & 196 & 0.714 \\ BMA-co-TRIM\_4\_C & 102 & 183 & 217 & 0.628 \\ \hline \end{tabular}
\end{table} 
Table 3: The statistical data of particle size distribution. One of the most important characteristics of polymeric materials is their thermal resistance. In this study, thermal properties of the investigated copolymers were evaluated on the basis of thermogravimetry. Based on TG studies, it can be concluded that all of the copolymer under study exhibit good thermal stability in inert as well as oxidative atmospheres (Tables 4 and 5). Among them, the best thermal resistance demonstrated BMA-_co-_TRIM copolymers. Its initial decomposition temperature was above 300 \({}^{\circ}\)C. This phenomenon is caused by the high (equal six) functionality of TRIM and its possibility to form highly crosslinked polymeric network. On the other hand, the value of final decomposition temperature was observed for BMA-co-DVB copolymers. The chemical structure of the DVB monomer can explain this fact. It possesses an aromatic ring that contributes to better thermal stability. Increasing the molar ratio to 1:4 for DVB as well as for TRIM resulted in the enhancement of thermal resistance of the synthesized copolymers. The opposite relationship was observed for EGDMA. Generally, the least thermally stable are copolymers of this tetrafunctional, aliphatic comonomer. All the indicators of thermal resistance determined for BMA-co-EGDMA microspheres have the lowest value among all investigated materials. \begin{table}
\begin{tabular}{c c c c c c c c} \hline
**Copolymeric** & \(T_{5\%}\) (\({}^{\circ}\)C) & \(T_{20\%}\) (\({}^{\circ}\)C) & \(T_{50\%}\) (\({}^{\circ}\)C) & \(T_{\text{max1}}\) (\({}^{\circ}\)C) & \(T_{\text{max2}}\) (\({}^{\circ}\)C) & \(T_{\text{max3}}\) (\({}^{\circ}\)C) & **FDT** \\ \hline BMA-co-DVB\_1 & 256 & 307 & 367 & 335 & 425 & 646 & 720 \\ BMA-co-DVB\_4 & 261 & 312 & 381 & 343 & 431 & 658 & 738 \\ BMA-co-EGDMA\_1 & 254 & 301 & 356 & 320 & 417 & 571 & 673 \\ BMA-co-EGDMA\_4 & 241 & 286 & 341 & 311 & 402 & 562 & 664 \\ BMA-co-TRIM\_1 & 304 & 346 & 434 & 325 & 442 & 571 & 680 \\ BMA-co-TRIM\_4 & 309 & 358 & 452 & 336 & 456 & 583 & 692 \\ \hline \end{tabular}
\end{table} 
Table 4: The characteristic temperatures determined on the basis of TG and DTG data (helium atmosphere). Figure 5: SEM images of the BMA-co-DVB_1_T (**left**) and BMA-co-TRIM_1_T (**right**) copolymers. \begin{table}
\begin{tabular}{c c c c c c c c} \hline
**Copolymeric** & \(T_{5\%}\) (\({}^{\circ}\)C) & \(T_{20\%}\) (\({}^{\circ}\)C) & \(T_{50\%}\) (\({}^{\circ}\)C) & \(T_{\text{max1}}\) (\({}^{\circ}\)C) & \(T_{\text{max2}}\) (\({}^{\circ}\)C) & \(T_{\text{max3}}\) (\({}^{\circ}\)C) & **FDT** \\ \hline BMA-co-DVB\_1 & 251 & 316 & 367 & 360 & 421 & 626 & 701 \\ BMA-co-DVB\_4 & 258 & 318 & 374 & 368 & 429 & 641 & 718 \\ BMA-co-EGDMA\_1 & 250 & 303 & 339 & 310 & 414 & 536 & 591 \\ BMA-co-EGDMA\_4 & 243 & 298 & 327 & 302 & 408 & 528 & 583 \\ BMA-co-TRIM\_1 & 301 & 327 & 369 & 335 & 456 & 536 & 596 \\ BMA-co-TRIM\_4 & 307 & 331 & 374 & 339 & 461 & 542 & 601 \\ \hline \end{tabular}
\end{table} 
Table 5: The characteristic temperatures determined on the basis of TG and DTG (synthetic air atmosphere).