Desilylation of substituted polyacetylenes by nanoparticles
Desilylation of substituted polyacetylenes by nanoparticles
复制标题
DOI：
10.1021/ma062421s
复制
发表时间：
2007-05-01
期刊：
影响因子：
5.5
通讯作者：
Masuda, Toshio
中科院分区：
文献类型：
--
作者：
Matteucci, Scott;Van Wagner, Elizabeth;Masuda, Toshio
将氧化镁纳米颗粒在三甲基硅基取代的聚乙炔溶液中分散，形成聚合物纳米复合材料。在这些颗粒的存在下，聚（1-三甲基硅基-1-丙炔）（PTMSP）和聚[1-苯基-2-[对-（三甲基硅基）苯基]乙炔]（PTMSDPA）发生部分脱硅。一些PTMSDPA/MgO纳米复合材料不溶于常见溶剂（如甲苯或氯仿），其溶解特性取决于颗粒负载和制备条件。在可能的情况下，用XPS， FTIR和NMR对反应产物进行了表征。用小分子模型化合物研究了三甲基硅基与纳米氧化镁的反应。在这些纳米颗粒填充的薄膜中，二氧化碳的渗透率比类似的未填充聚合物高6倍以上。这种现象可能为制备用于气体分离的高渗透性、化学稳定性膜提供了一条途径。
Magnesium oxide (MgO) nanoparticles were dispersed via solution processing in trimethylsilyl-substituted polyacetylenes to form polymer nanocomposites. In the presence of these particles, the polymers, poly(1-trimethylsilyl-1-propyne) (PTMSP) and poly[1-phenyl-2-[p-(trimethylsilyl)phenyl]acetylene] (PTMSDPA), were partially desilylated. Some PTMSDPA/MgO nanocomposites were insoluble in common solvents (e.g., toluene or chloroform), and the solubility characteristics depended on particle loading and preparation conditions. When possible, the reaction products were characterized using XPS, FTIR, and NMR. Small molecule model compounds were also used to study the reaction of trimethylsilyl groups with MgO nanoparticles. The CO2 permeability in these nanoparticle-filled films was over 6 times higher than in the analogous unfilled polymers. This phenomenon may provide a route for preparing highly permeable, chemically stable membranes for gas separations.