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首页> 外文期刊>Journal of Applied Polymer Science >POSS-induced rheological and dielectric modification of polyethersulfone
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POSS-induced rheological and dielectric modification of polyethersulfone

机译：POLS诱导的聚醚砜的流变和介电改性

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摘要

Polyhedral oligomeric silsesquioxane (POSS) nanostructured chemicals, when incorporated at low levels in thermoplastics, provide processability enhancement and viscosity reduction without compromising other bulk physical properties. POSS has been relatively unexplored in high performance polymers, and there is incomplete understanding of the mechanisms by which POSS produces flow improvements. In this study, polyethersulfone (PES) was melt-blended with trisilanolphenyl (TSP)-POSS and dodecaphenyl (DP)-POSS; and rheological, dielectric spectroscopy, and scanning electron microscopy evaluations were conducted to identify structure/property/processing relationships. TSP-POSS yielded greater processability improvements and viscosity reductions than DP-POSS, suppressed low temperature relaxations to a larger extent, and displayed a greater degree of nanoscale dispersion in the polymer matrix. The findings are evaluated in terms of competing theories of POSS viscosity reduction.
机译：多面体低聚倍半硅氧烷（POSS）纳米结构化学品在热塑性塑料中含量较低时，可在不损害其他本体物理性能的情况下提高加工性能和降低粘度。POSS在高性能聚合物中的研究相对较少，对POSS改善流动性的机理还不完全了解。在本研究中，聚醚砜（PES）与三硅醇苯基（TSP）-POSS和十二苯基（DP）-POSS熔融共混；进行流变学、介电光谱和扫描电子显微镜评估，以确定结构/性能/加工关系。与DP-POSS相比，TSP-POSS产生了更大的加工性能改善和粘度降低，在更大程度上抑制了低温松弛，并在聚合物基体中表现出更大程度的纳米级分散。根据POSS粘度降低的竞争理论对研究结果进行了评估。

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