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DSC STUDY OF THERMAL DECOMPOSITION OF PARTIALLY OZONIZED DIENE RUBBERS

机译:DSC研究部分臭氧化的二烯橡胶的热分解

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The thermal decompositions of partially ozonized 1,4-cis-polybutadiene (E-BR), 1,4-cis-polyisoprene (E-IR), 1,4-trans-polyisoprene (Z-IR), 1,4-trans-polychloroprene (Z-PCh), and of polybutadiene elastomer (BR) (microstructure: 1,4-cis, 47%; 1,4-trans, 42%; 1,2, 11%) were studied. The respective thermograms were described by the presence of an intense and relatively broad exothermic peak in the 60-200 degrees C range, which is the result of thermolysis of functional groups of the peroxide type. The measured values of the enthalpy of the reaction, normalized with respect to the amount of reacted ozone (kJ/mol O-3), were as follows: 337 (E-BR), 260 (BR), 197 (E-IR), 180 (Z-IR), and 239 (Z-PCh). Values of the activation energy and reaction order were also determined: 122.6, 118.5, 108, 113, 101.5 and 1.0, 0.96, 1.04, 1.08, and 1.25, respectively. The enthalpy values, obtained by means of differential scanning calorimetry, should be used for quantitative determination of ozonides from polydienes and polyisoprenes. (C) 1996 John Wiley & Sons, Inc. [References: 28]
机译:部分臭氧化的1,4-顺式聚丁二烯(E-BR),1,4-顺式聚异戊二烯(E-IR),1,4-反式聚异戊二烯(Z-IR),1,4-反式的热分解研究了聚氯丁二烯(Z-PCh)和聚丁二烯弹性体(BR)(微结构:1,4-顺式,47%; 1,4-反式,42%; 1,2,11%)。通过在60-200℃范围内存在强烈且相对宽的放热峰来描述各个热谱图,这是过氧化物类型的官能团热解的结果。相对于已反应的臭氧量(kJ / mol O-3)标准化的反应焓的测量值如下:337(E-BR),260(BR),197(E-IR) ,180(Z-IR)和239(Z-PCh)。还确定了活化能和反应顺序的值:分别为122.6、118.5、108、113、101.5和1.0、0.96、1.04、1.08和1.25。通过差示扫描量热法获得的焓值应用于定量测定聚二烯和聚异戊二烯中的臭氧化物。 (C)1996 John Wiley&Sons,Inc. [参考:28]

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