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首页> 外文期刊>Journal of Applied Polymer Science >Microcellular polymeric foams based on 1-vinyl-2-pyrrolidone and butyl-acrylate with tuned thermal conductivity
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Microcellular polymeric foams based on 1-vinyl-2-pyrrolidone and butyl-acrylate with tuned thermal conductivity

机译：基于1-乙烯基-2-吡咯烷酮和具有调谐导热率的微孔聚合物泡沫和丙烯酸丁酯

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摘要

Microcellular polymers have been produced by ScCO2 foaming, based on 1-vinyl-2-pyrrolidone (VP) and butyl-acrylate (BA). Three different copolymers were prepared, varying the compositions of VP and BA, following a simple radical polymerization process using an UV initiator. The samples a good foaming behavior and also excellent flexibility and handle ability, with expansion ratios between 1.53 and 1.72, and cell sizes in the microcellular range (below 5 mu m). However, it was observed that the gas distribution and, consequently, the cellular structure inside the polymer foams was highly dependent on the VP and BA proportions, leading to very different thermal conductivity values, even for similar volume gas fraction values. These results were related to the copolymer nanostructuration, which seems to have an influence in the final pore structure, thus opening the possibility of designing microcellular foams with similar macroscopic characteristics but different thermal conductivity values. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45872.
机译：基于1-乙烯基-2-吡咯烷酮（VP）和丁基 - 丙烯酸酯（BA），通过SCCO2发泡生产微孔聚合物。制备三种不同的共聚物，在使用UV引发剂的简单自由基聚合过程之后，改变VP和BA的组合物。样品具有良好的发泡行为，也具有优异的柔韧性和手柄能力，并且在1.53和1.72之间的膨胀比和微孔范围内的细胞尺寸（低于5μm）。然而，观察到气体分布和因此，聚合物泡沫内的细胞结构高度依赖于VP和BA比例，导致具有非常不同的导热值，即使对于类似的体积气体级分值。这些结果与共聚物纳米结构有关，该共聚物纳米结构似乎对最终孔结构有影响，从而打开具有类似宏观特性但不同的导热率值的微孔泡沫的可能性。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45872。

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