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Structural evolution and kinetic study of high isotacticity poly(acrylonitrile) during isothermal pre-oxidation
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  • Journal title : Carbon letters
  • Volume 12, Issue 4,  2011, pp.229-235
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2011.12.4.229
 Title & Authors
Structural evolution and kinetic study of high isotacticity poly(acrylonitrile) during isothermal pre-oxidation
Zhang, Li; Dai, Yongqiang; Kai, Yi; Jin, Ri-Guang;
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Isotactic polyacrylonitrile (PAN) with triad isotacticity of 0.53, which was determined by NMR, using dialkylmagnesium as an initiator, was successfully synthesized. Isothermal treatment of iso-PAN was conducted in air at 200, 220, 250 and . Structural evolutions and chemical changes were studied with Fourier transformation infrared and wide-angle X-ray diffraction during stabilization. A new parameter was defined to evaluate residual nitrile groups. Crystallinity and crystal size were calculated with X-ray diffraction dates. The results indicated that the nitrile groups had partly converted into a ladder structure as stabilization proceeded. The rate of reaction increased with treatment temperature; crystallinity and crystal size decreased proportionally to pyrolysis temperature. The iso-conversional method coupled with the Kissinger and Flynn-Wall-Ozawa methods were used to determine kinetic parameters via differential scanning calorimetry analysis with different heating rates. The active energy of the reaction was 171.1 and 169.1 kJ/mol, calculated with the two methods respectively and implied the sensitivity of the reaction with temperature.
high isotacticity;polyacrylonitrile;stabilization;kinetics;iso-conversional;
 Cited by
POSS 부가가 폴리아크릴로니트릴 중합과 열적 성질에 미치는 영향,김미희;하유미;김민아;핫산 말릭 삼시;구자람;김현철;길명섭;

한국섬유공학회지, 2012. vol.49. 6, pp.402-410 crossref(new window)
Effect of doping polyacrylonitrile fibers on their structural and mechanical properties, Polymer, 2015, 75, 97  crossref(new windwow)
Parameter study and characterization for polyacrylonitrile nanofibers fabricated via centrifugal spinning process, European Polymer Journal, 2013, 49, 12, 3834  crossref(new windwow)
Tunable dielectric properties in polyacrylonitrile/multiwall carbon nanotube composites, Polymer Composites, 2015, n/a  crossref(new windwow)
A procedure for precise determination of thermal stabilization reactions in carbon fiber precursors, Polymer Degradation and Stability, 2013, 98, 12, 2537  crossref(new windwow)
Shindo A. Studies on Graphite Fiber Report of the Government Industrial Research Institutes Osaka, Agency of Industrial Science and Technology, Osaka, Japan, 317 (1961).

Shindo A. 130. On the carbonization of polyacrylonitrile fiber. Carbon, 1, 391 (1964). crossref(new window)

Edie DD. The effect of processing on the structure and properties of carbon fibers. Carbon, 36, 345 (1998). crossref(new window)

Ogawa H. Architectural application of carbon fibers development of new carbon fiber reinforced glulam. Carbon, 38, 211 (2000). crossref(new window)

Bahl OP, Mathur RB, Kundra KD. Structure of PAN fibres and its relationship to resulting carbon fibre properties. Fibre Sci Technol, 15, 147 (1981). crossref(new window)

Rahaman MSA, Ismail AF, Mustafa A. A review of heat treatment on polyacrylonitrile fiber. Polym Degrad Stab, 92, 1421 (2007). crossref(new window)

Devasia R, Reghunadhan Nair CP, Sadhana R, Babu NS, Ninan KN. Fourier transform infrared and wide-angle X-ray diffraction studies of the thermal cyclization reactions of high-molar-mass polyacrylonitrile-co-itaconic acid. J Appl Polym Sci, 100, 3055 (2006). crossref(new window)

Xu ZX, Xu J, Xu LH, Dai YQ, Xue LW, Jin RG. Kinetic study of cyclization of high-tacticity polyacrylonitrile heat-treated under air atmosphere via XRD. Polymer (Korea), 32, 150 (2008).

Yamazaki H, Miyazaki Y, Kamide K. Stereospecific polymerization of acrylonitrile using acrylonitrile-urea canal complex initiated by γ-ray irradiation. Roles of radical chain transfer reagents. Polym J, 23, 765 (1991). crossref(new window)

Wan AJ, Zhao CX, Qian BJ. Optimum seeking method for synthesizing high stereoregular polyacrylonitrile. Polym Mater Sci Eng, 17, 48 (2001).

Wu C, Wan A, Zhao J, Synth Technol Appl, 15, 1 (2000).

Bashir Z. A critical review of the stabilisation of polyacrylonitrile. Carbon, 29, 1081 (1991). crossref(new window)

Dalton S, Heatley F, Budd PM. Thermal stabilization of polyacrylonitrile fibres. Polymer, 40, 5531 (1999). crossref(new window)

Chen C, Ma X, Liu K. Thermogravimetric analysis of microalgae combustion under different oxygen supply concentrations. Appl Energy, 88, 3189 (2011). crossref(new window)

Collins GL, Thomas NW, Williams GE. Kinetic relationships between heat generation and nitrile consumption in the reaction of poly(acrylonitrile) in air at ${265^{\circ}C}$. Carbon, 26, 671 (1988). crossref(new window)

Kamide K, Ono H, Hisatani K. Stereospecifity in the polymerization of acrylonitrile using anionic initiators including dialkylmagnesium. Polym J, 24, 917 (1992). crossref(new window)

Ono H, Hisatani K, Kamide K. NMR spectroscopic study of side reactions in anionic polymerization of acrylonitrile. Polym J, 25, 245 (1993). crossref(new window)

Bajaj P, Sreekumar TV, Sen K. Effect of reaction medium on radical copolymerization of acrylonitrile with vinyl acids. J Appl Polym Sci, 79, 1640 (2001).<1640::aid-app140>;2-7. crossref(new window)

Ozawa T. A new method of analyzing thermogravimetric data. Bull Chem Soc Jpn, 38, 1881 (1965). crossref(new window)

Kissinger HE. Reaction kinetics in differential thermal analysis. Anal Chem, 29, 1702 (1957). crossref(new window)

Tiptipakorn S, Damrongsakkul S, Ando S, Hemvichian K, Rimdusit S. Thermal degradation behaviors of polybenzoxazine and siliconcontaining polyimide blends. Polym Degrad Stab, 92, 1265 (2007). crossref(new window)

Reghunadhan Nair CP, Krishnan K, Ninan KN. Differential scanning calorimetric study on the Claisen rearrangement and thermal polymerisation of diallyl ether of bisphenols. Thermochim Acta, 359, 61 (2000). crossref(new window)