Porosity development in chars from thermal degradation of poly (p-phenylene benzobisoxazole)

被引：8

作者：

Beatriz Vazquez-Santos, M. ^{[1
]}

Martinez-Alonso, Amelia ^{[1
]}

Tascon, Juan M. D. ^{[1
]}

机构：

[1] CSIC, Inst Nacl Carbon, E-33080 Oviedo, Spain

来源：

POLYMER DEGRADATION AND STABILITY | 2009年 / 94卷 / 01期

关键词：

Poly(p-phenylene benzobisoxazole); Chars; Porosity; Adsorption; POLYARAMID FIBERS; CARBON-FIBERS; CARBONIZATION;

D O I：

10.1016/j.polymdegradstab.2008.10.014

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The main objective of this work was to investigate porosity development in carbonaceous materials formed by thermal degradation of the high thermal stability polymer, polyp-phenylene benzobisoxazole) (PBO). Two varieties of PBO, as-spun (AS) and high-modules (HM) were studied. Chars obtained at various polymer decomposition temperatures (selected on the basis of thermogravimetric and differential thermal analysis results) were characterized by elemental analysis, inferred spectroscopy, X-ray diffraction and CO2 adsorption at 273 K. The obtained adsorbents essentially contained narrow micropores, and Maximum pore development took place at ca. 1000 K, when the polymer was not yet completely decomposed. At higher temperatures, there is a certain pore widening along with a displacement towards smaller pore sizes, and the pore volume significantly decreases. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：7 / 12

页数：6

共 24 条

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