Photostabilizer additives are employed to shield polymer materials from ultraviolet (UV) degradation. One category of such additives includes ultraviolet light absorbers (UVA), which absorb radiation and dissipate it within the polymer network as heat. These additives are typically incorporated into the polymer during processing, but they can pose challenges such as low miscibility and migration of the additive to the polymer's surface. A viable solution to these issues is the synthesis of polymers with additives chemically connected to the polymer chain. This work investigates the copolymerization of styrene with the additive 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl methacrylate (BHEM), resulting in the formation of PS-BHEM. This copolymer was then utilized in commercial polymers (PS, HIPS, and ABS) to mitigate degradation, with a comparative analysis of its effectiveness against the commercial stabilizer Tinuvin P. The copolymerization process yields a 92 % product, and the presence of BHEM is confirmed through SEC analysis. Accelerated weather degradation tests indicate that the incorporation of PS-BHEM enhances the UV stabilization of commercial ABS without altering the mechanical properties of the polymers.

中文翻译：

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含低分子量甲基丙烯酸2-[3-(2H-苯并三唑-2-基)-4-羟基苯基]乙酯的聚苯乙烯用作大添加剂光稳定剂

光稳定剂添加剂用于保护聚合物材料免受紫外线 (UV) 降解。此类添加剂的一类包括紫外线吸收剂 (UVA)，它吸收辐射并将其作为热量在聚合物网络内消散。这些添加剂通常在加工过程中掺入聚合物中，但它们可能会带来诸如低混溶性和添加剂迁移到聚合物表面等挑战。解决这些问题的一个可行的解决方案是合成具有化学连接到聚合物链上的添加剂的聚合物。这项工作研究了苯乙烯与添加剂甲基丙烯酸 2-[3-(2H-苯并三唑-2-基)-4-羟基苯基]乙基甲基丙烯酸酯 (BHEM) 的共聚，从而形成 PS-BHEM。然后将该共聚物用于商业聚合物（PS、HIPS 和 ABS）以减轻降解，并对其与商业稳定剂 Tinuvin P 的有效性进行比较分析。共聚过程产生了 92% 的产品，并证实了 BHEM 的存在通过SEC分析。加速气候降解测试表明，PS-BHEM 的加入增强了商用 ABS 的紫外线稳定性，而不会改变聚合物的机械性能。