锗掺杂聚合物及其泡沫的制备与表征  

Fabrication and characterization of Ge-doped polymer and foam

作　　者：黄传群[1] 罗炫[1] 方瑜[1] 张庆军[1] 杨睿戆[1] 陈姝帆[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2013年第12期3239-3242,共4页High Power Laser and Particle Beams

基　　金：中国工程物理研究院科学技术发展基金项目(2010B0302047)

摘　　要：采用稳定自由基聚合法合成了锗掺杂聚苯乙烯类聚合物，并利用聚合物溶液的热致相分离原理和冷冻干燥技术制备出具有多孔结构的锗掺杂泡沫材料。通过核磁共振氢谱、等离子体发射光谱及扫描电镜等测试手段表征了聚合物分子和泡沫结构。结果表明，聚合物分子具有极窄的分子量分布，锗掺杂原子分数为2．6％；泡沫具有多孔网络结构和薄片状骨架，骨架间的孔洞尺寸为1～10／zm，泡沫骨架随密度的降低趋于细化，孔洞变大。Ge-doped polystyrenes with various molecular weights and low polydispersities were successfully synthesized by stable free radical polymerization of Ge-doped styrene at 120 ~C in bulk using 2,2,6,6-tetramethyl-l-piperidinyl-oxyl （TEMPO） and AIBN as mediator and initiator respectively. Ge-doped polystyrene foams were obtained by thermally-induced phase separation technique and freezing-dry technology. 1 H nuclear magnetic resonance（1 H-NMR）, Fourier transform infrared spectra（FTIR） and scanning electron microscope（SEM） were applied to characterize the structure of polymers and foams. The results showed that Germanium content in polymer was 2.6 atom% and foams presented porous interconnected structures with macropores of about 1- 10 μm.

关 键 词：锗掺杂 聚苯乙烯 稳定自由基聚合 泡沫 

分 类 号：O632[理学—高分子化学]