The Depolymerization of Polyhexanamide Catalyzed by Sodium Hydroxide under Steam Blowingt

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  • 水蒸気吹き込み下における水酸化ナトリウムを触媒とするポリヘキサンアミドの解重合
  • ポリヘキサンアミドの解重合　ＩＶ　　水蒸気吹き込み下における水酸化ナトリウムを触媒とするポリヘキサンアミドの解重合

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Description

The depolymerization of polyhexanamide catalyzed by sodium hydroxide under steam blowing was studied.<BR>The depolymerization reaction of polyhexanamide under steam blowing catalyzed by sodium hydroxide was of the zero-order. The rate constant (k) for the formation of 6-hexanelactam consisted of the catalytic term k_0000 due to the acidic effect of carboxyl end groups of polyhexanamide and the non-catalytic term (k000, 0) due to the neutralization of carboxy 1 end groups with sodium hydroxide; k=k_000II +kONs% The rate constants for depolymerization at 310°C were calculated from the experimental results as follows:<BR>k-0oo11=0.36 x 10-2 [mmolfgrd-mol. hr]/[-NH2 meq/kg]<BR>k-000tin.=0.013 x 10-2 [mmol/grd-mol hr]/[-NIII meg/kg]<BR>The appatent activation energy of the depolymerization catalyzed by 2.00 wt % sodium hydroxide was 27.5 kcal/mol.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1977 (7), 1041-1045, 1977-07-10

    The Chemical Society of Japan

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