To evaluate the influence of specific parameters, i.e. energy sink concentration and excitons and/or radical migration, on the mechanisms underlying the formation of double bonds in aliphatic polymers, materials with energy sinks in the chain were synthesized. By following the radiation-induced modifications in ethylene/styrene random copolymers, as a function of the styrene content and of the irradiation temperature, we were able to understand the formation mechanisms of trans-vinylenes, trans-trans-dienes, allyl radicals and vinyls. The irradiation temperature allows the discrimination between energy transfers (at 11 K and at room temperature, RT) and of radical migration (at RT). Irradiations were performed using swift heavy ions, and we could show that track overlapping has also an influence on the studied chemical group concentrations. For instance, trans-vinylenes are influenced by excitation transfer and radical migration: their formation decreases in presence of styrene aromatic rings, whatever the dose range and the irradiation temperature. On the opposite, vinyls are formed only at high ionizing density and are not influenced by excitation transfer; however, their concentration is influenced by radical migration.

为了评估特定参数（即能量吸收剂浓度和激子和/或自由基迁移）对脂族聚合物中双键形成机理的影响，合成了在链中具有能量吸收剂的材料。通过遵循乙烯/苯乙烯无规共聚物中辐射诱导的改性，以及苯乙烯含量和辐射温度的函数，我们能够了解反式亚乙烯基，反式-反式-二烯，烯丙基和乙烯基。辐射温度可以区分能量转移（在11 K和室温，RT）和自由基迁移（在RT）之间。使用快速重离子进行辐照，我们可以证明轨迹重叠对所研究的化学基团浓度也有影响。例如，反式亚乙烯基受激发转移和自由基迁移的影响：无论剂量范围和照射温度如何，在苯乙烯芳环的存在下它们的形成都会减少。相反，乙烯基仅在高电离密度下形成，不受激发转移的影响。但是，它们的浓度受自由基迁移的影响。