Study on thermal degradation mechanisms of comb polyacrylates containing long fluorocarbon side chains by TG/FTIR

Shi, Lei; Saitoh, Hirokazu; Shibasaki, Yoshio

doi:10.1002/1099-0518(20000801)38:15<2794::aid-pola200>3.0.co;2-9

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…In the case of the fluoroacrylic dispersion, the more limited knowledge on the thermal degradation of fluoropolymers [25][26][27] made necessary the preparation and pyrolysis of a series of reference fluorinated polymers, as detailed below. At the same time, the interpretation of the EI mass spectra of the resulting fluorinated products of pyrolytic degradation resulted to be the best option for overcoming the limits of the electronic libraries in use.…”

Section: Resultsmentioning

confidence: 99%

Compositional analysis of fluorinated and unfluorinated acrylic copolymers

Lazzari

Scalarone

Riedo

et al. 2009

Journal of Analytical and Applied Pyrolysis

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Section: Resultsmentioning

confidence: 99%

Compositional analysis of fluorinated and unfluorinated acrylic copolymers

Lazzari

Scalarone

Riedo

et al. 2009

Journal of Analytical and Applied Pyrolysis

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“…For this purpose the examination of the thermal degradation of vinyl copolymers seems to be a profitable subject, because the role of chemical groups, such as ÐCÐH, ÐCH 3 , ÐC 6 H 5 , Ð(CF 2 ) n CF 3 , in the thermal degradation of polymer chain might be elucidated easily. Previously we studied the thermal degradation mechanism of copolymers [1±5] and comb poly-acrylates containing long fluorocarbon side chains [6]. In this paper, thermal degradation mechanisms of the copolymers of styrene (St) with methacrylonitrile (MAN) and a-methylstyrene (aMSt) were studied by pyrolysis gas chromatography (Py-GC) and controlled rate thermogravimetry (CRTG), because the role of functional groups on the thermal degradation in rapid heating and in continuous temperature elevation can be elucidated.…”

mentioning

confidence: 99%

Effect of functional groups on the thermal degradation of copolymers

Shibasaki

Yang

Sun

2002

Polymers for Advanced Techs

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Thermal degradation mechanisms of the copolymers of styrene (St) with methacrylonitrile (MAN) and amethylstyrene (aMSt) were studied by pyrolysis gas chromatography (Py-GC) and thermogravimetry (TG). Thermal degradation of vinyl polymers in flash pyrolysis proceeded mainly in the competition between depolymerization and back biting reaction caused by abstraction of H atom at a-position in pen-penultimate unit. Monomer molecules were regenerated by depolymerization, and dimer, trimer and ologomers were produced by back biting reaction. Methyl groups at a-position of monomer unit strictly hindered the back biting reaction. The role of functional groups on the thermal degradation was elucidated on the basis of bond dissociation energies of main chain (Q CÐC ), apparent activation energies (DE a ) obtained by Ozawa's method from the TG curves at various heating rates. Effect of chemical reactivity of ÐCN group in MAN unit on the thermal degradation was clarified by the controlled rate thermogravimetry (CRTG). Thermal Degradation of Copolymers / 265FIGURE 8. CRTG curves for PSt, PMAN and poly(St-co-MAN)s (F MAN = 33, 55, 78 mol%): constant rate of loss of mass, 20±30 mg min À1 .FIGURE 9. TG curves of PSt, PaMSt and poly(St-co-aMSt)s (F aMSt = 37, 52, 62 mol%): heating rate, 10°C min À1 .FIGURE 10. CRTG curves of PSt, PaMSt and poly(St-co-aMSt)s (F aMSt = 37, 52, 62 mol%): constant rate of loss of mass, 20±30 mg min À1 .

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