Non-isothermal kinetic analysis of oxidative stabilization processes in PAN fibers

被引：17

作者：

Belyaev, Stanislav S. ^{[1
,2
]}

Arkhangelsky, Igor V. ^{[1
,2
]}

Makarenko, Irina V. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Inst New Carbon Mat & Technol, Moscow 119991, Russia

来源：

THERMOCHIMICA ACTA | 2010年 / 507-08卷

关键词：

Polyacrylonitrile; DSC; Cyclization; Stabilization; Non-isothermal kinetics; POLYACRYLONITRILE FIBERS; CARBONIZATION; CYCLIZATION; COPOLYMERS;

D O I：

10.1016/j.tca.2010.04.022

中图分类号：

O414.1 [热力学];

学科分类号：

070201 [理论物理];

摘要：

Non-isothermal kinetic analysis of oxidative stabilization processes in polyacrylonitrile (PAN) fibers was studied with the use of the differential scanning calorimetry (DSC) data. PAN terpolymer fibers consisting of acrylonitrile, methyl acrylate and itaconic acid were studied. Kinetic parameters and kinetic models of nitrile cyclization and oxidative destruction of chain fragments and functional groups were obtained. On the basis of these kinetic models constant heat flow temperature programs with maximum heat flow of 0.11 mW/mg for PAN fiber and 0.09 mW/mg for pre-oxidized PAN fiber were calculated. It was shown that simulated degree of conversion coincides within errors with cyclization index (CD) for stabilized fiber. CD can be used as an estimation of degree of conversion in research and practical applications. Technique of kinetic analysis, that was used, allows optimization of conditions for thermal stabilization for any required cyclization index and degree of conversion for the oxidative stabilization process in PAN fibers. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：9 / 14

页数：6

共 18 条

[1]

[Anonymous], 2005, CARBON FIBERS THEIR

[2]

[Anonymous], 2002, ANAL ANAL CHEM, DOI DOI 10.1021/AC60131A045

[3]

Askadsky A. A., 2009, INTRO PHYSICOCHEMIST

[4]

Thermal behaviour of acrylonitrile copolymers having methacrylic and itaconic acid comonomers [J].

Bajaj, P ;

Sreekumar, TV ;

Sen, K .

POLYMER, 2001, 42 (04) :1707-1718

[5]

CORRISH PJ, 1992, ENCY POLYM PROCESSIN

[6]

Cyclization reaction in poly(acrylonitrile/itaconic acid) copolymer: An isothermal differential scanning calorimetry kinetic study [J].

Devasia, R ;

Reghunadhan, CP ;

Sivadasan, NP ;

Katherine, BK ;

Ninan, KN .

JOURNAL OF APPLIED POLYMER SCIENCE, 2003, 88 (04) :915-920

[7]

Donnet J.-B., 1998, Carbon fibers, V3rd

[8]

OPTIMIZATION OF STABILIZATION AND CARBONIZATION TREATMENT OF PAN FIBERS AND STRUCTURAL CHARACTERIZATION OF THE RESULTING CARBON-FIBERS [J].

FITZER, E ;

FROHS, W ;

HEINE, M .

CARBON, 1986, 24 (04) :387-395

[9]

Mechanism and kinetics of stabilization reactions of polyacrylonitrile and related copolymers .3. Comparison among the various types of copolymers as viewed from isothermal DSC thermograms and FT-IR spectral changes [J].

Kakida, H ;

Tashiro, K .

POLYMER JOURNAL, 1997, 29 (07) :557-562

[10]

KLIMENKO LB, 1993, FIBRE CHEM+, V25, P453

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