低密度聚环己基乙烯泡沫的制备  

Fabrication of low density poly(vinylcyclohexane) foams

作　　者：徐业伟[1] 罗炫[1] 朱方华[1] 张林[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》2010年第7期1567-1570,共4页High Power Laser and Particle Beams

摘　　要：低密度CH聚合物多孔材料是惯性约束聚变（ICF）的重要靶材料,利用热致相分离原理对低密度聚环己基乙烯泡沫的制备进行了研究。首先通过聚苯乙烯（PS）氢化反应制备了聚环己基乙烯（PVCH）,经过溶剂选择,确定以环己烷/1,4-二氧六环为溶剂体系,经热致相分离和冷冻干燥技术制备出低密度PVCH泡沫。通过分析溶液浓度对泡沫密度的影响,确定了泡沫密度与聚合物溶液质量浓度之间的关系,在0.04－0.15 g/cm3范围之内可实现对泡沫密度的有效控制。泡沫孔结构测试结果表明随着密度的增加,平均孔径有升高的趋势,孔径分布趋于单一化,孔径范围为23.63－0.83μm。The preparation of poly（vinylcyclohexane） （PVCH） foam has been investigated via the thermally-induced phase separation technique and the freeze-drying technique. Polystyrene was saturated using heterogeneous hydrogenation techniques to prepare PVCH. Then low density foams were successfully prepared with the cyclohexane/dioxane solvent and a series oi PVCH solutions with different concentrations, by the thermally-induced phase separation technique and the freeze-drying technique. The relation between polymer concentration and foam density was analyzed. The results show that polymer concentration has a good linear relationship with the actual density of PVCH foams and there is a fixed difference between the actual density and theoretic density, thus effectual control on the density of foams can be achieved from 0.04 to 0.15 g/cm^3. The pore structure of foams was also analyzed. The results show that the average pore size increases and the pore size distribution tends to be uniform with the in- crease of foam density, and the range of pore radius is from 23.63 μm to 0.83 μm.

关 键 词：聚环己基乙烯 惯性约束聚变 低密度泡沫 热致相分离技术 冷冻干燥技术 

分 类 号：TQ320.72[化学工程—合成树脂塑料工业]