首页> 外文期刊>Journal of Applied Polymer Science >Positron Annihilation Lifetime Studies of Gas Sorption and Desorption in Polyethyelne and Poly[1-(trimethylsilyl)-1-propyne]
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Positron Annihilation Lifetime Studies of Gas Sorption and Desorption in Polyethyelne and Poly[1-(trimethylsilyl)-1-propyne]

机译:聚乙烯和聚[1-(三甲基甲硅烷基)-1-丙炔]中气体吸附和解吸的正电子An没寿命研究

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摘要

The variation of free-volume parameters (lifetime,intensity, and distribution) after sorption and esorption of CO_2 and CH_4 gases in the glassy polymer poly[1-(trimethylsilyl)-1-propylne](PTMSP) and int eh rubbery high-density polyethylene (HDPE) and low-density polyethylene (LDPE) were determined by the PAL technique. Size distriubtions deduced from PAL measurements reveal the presence of large free-volume holes in PTMSP with a average size of 0.725 nm~3 and intenstiy of 22% in addition to a free-volume hole size of 0.197 nm~3 with an intensity of 11%. In polyethylene free-volume hole sizes of 0.107 and 0.153 nm~3 with intensities of 21% and 25% could be deduced for HDPE and LDPE, respectively.
机译:在玻璃态聚合物聚[1-(三甲基甲硅烷基)-1-丙炔](PTMSP)和高橡胶态高密度聚合物中吸附和吸附CO_2和CH_4气体后,自由体积参数的变化(寿命,强度和分布)聚乙烯(HDPE)和低密度聚乙烯(LDPE)通过PAL技术确定。通过PAL测量得出的尺寸分布显示,PTMSP中存在大的自由体积孔,平均尺寸为0.725 nm〜3,强度为22%,此外,自由体积孔尺寸为0.197 nm〜3,强度为11 %。在聚乙烯中,HDPE和LDPE的自由孔尺寸分别为0.107和0.153 nm〜3,强度分别为21%和25%。

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