硫掺杂聚苯乙烯的制备研究

Research on the Preparation of Sulfur Doped Polystyrene

在二硫代苯甲酸和偶氮二异丁腈引发下,苯乙烯与溴代苯乙烯发生可逆加成断裂链转移自由基(RAFT)共聚,所得共聚物与正丙基硫化钠在N-甲基吡咯烷酮中发生亲核取代反应,再与碘甲烷作用,成功制备了新型硫醚型硫掺杂聚苯乙烯。分别采用红外光谱、核磁共振氢谱、元素分析和凝胶渗透色谱对聚合物化学结构、硫原子掺杂量和相对分子质量进行了表征。结果表明,成功合成了硫掺杂聚苯乙烯,硫原子的掺杂量可控且掺杂均匀。该类硫掺杂聚苯乙烯有望为惯性约束聚变(ICF)靶研究提供更多的诊断信息,对ICF靶科学研究有着重要的现实意义。

A copolymerization of 4-bromostyrene and styrene was conducted via the reversible addition-fragmentation chain transfer （RAFT） method, using AIBN as initiator and dithiobenzoic acid as chain transfer agent. After sequence reaction of the copolymer with sodium n-propylthiolate via nucleophilic substitution and methyl iodide, a new type of sulfide-type sulfur-doped polystyrene was prepared successfully. The structures of the polymer were confirmed by means of IR and ^l H NMR. The molecular weight was measured by gel permeation chromatograrn （GPC） and the doped amount of sulfur atom was analysized by element analysis. The results show that the doped amount of sulfur atom is controllable and uniform. This kind of sulfur-doped polystyrene is expected to provide more useful diag- nostic information on the inertial confinement fusion.