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首页> 外文期刊>Polymer Degradation and Stability >Preparation and thermal degradation kinetics of terpolymer poly(ε-caprolactone-co-l,2-butylene carbonate)
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Preparation and thermal degradation kinetics of terpolymer poly(ε-caprolactone-co-l,2-butylene carbonate)

机译：三元共聚物聚（ε-己内酯-co-1,2-丁烯碳酸酯）的制备及热降解动力学

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摘要

Poly(ε-caprolactone-co-l,2-butylene carbonate) (PBCCL) was successfully synthesized via terpolymeri-zation of carbon dioxide, 1,2-butylene oxide(BO) and e-caprolactone (CL). A polymer-supported bimetallic complex (PBM) was used as catalyst. The influences of various reaction conditions such as reaction content, reaction time and reaction temperature on properties of terpolymers were investigated. When CL content increased, the viscosity-average molecular weights (M_v), glass transition temperature (T_g) and decomposition temperature (T_d) of PBCCL improved relative to those of poly( 1,2-butylene carbonate) (PBC). Prolonging the reaction time resulted in increase in M_v and T_g. As reaction temperature increased, the molar fractions of CL (F_(CL)) increased obviously. When the reaction temperature went beyond 80 ℃, the resulting copolymers tended to be crystalline. The thermal properties and degradation behaviors of PBCCL were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The apparent activation energy and thermal degradation model of PBCCL was estimated by means of Ozawa-Flynn-Wall method and Phadnis-Deshpande method, respectively. The results showed that T_g and T_d of the terpolymer PBCCL were much higher than those of PBC. The thermal degradation behavior of PBCCL was evidenced by one-step thermal degradation profile. The average apparent activation energy is 77.06 Kj/mol, the thermal degradation kinetics follows the power law thermal decomposition model.
机译：通过二氧化碳，1,2-环氧丁烷（BO）和ε-己内酯（CL）的三元聚合反应成功合成了聚（ε-己内酯-碳酸1,2-丁烯酯）（PBCCL）。聚合物负载的双金属配合物（PBM）用作催化剂。研究了反应条件，反应时间，反应温度等反应条件对三元共聚物性能的影响。当CL含量增加时，PBCCL的粘均分子量（M_v），玻璃化转变温度（T_g）和分解温度（T_d）相对于聚1,2-碳酸亚丁酯（PBC）而言。延长反应时间导致M_v和T_g增加。随着反应温度的升高，CL的摩尔分数（F_（CL））明显增加。当反应温度超过80℃时，所得共聚物趋于结晶。通过差示扫描量热法（DSC）和热重分析（TGA）研究了PBCCL的热性质和降解行为。用Ozawa-Flynn-Wall法和Phadnis-Deshpande法分别估算了PBCCL的表观活化能和热降解模型。结果表明，三元共聚物PBCCL的T_g和T_d远高于PBC。 PBCCL的热降解行为由一步热降解曲线证明。平均表观活化能为77.06 Kj / mol，热降解动力学遵循幂律热分解模型。

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  • 来源
    《Polymer Degradation and Stability》 |2010年第12期|p.2453-2460|共8页
  • 作者

    Yanfei Liu; Dongming Peng; Kelong Huang; Suqin Liu; Zhenbao Liu;

  • 作者单位

    School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;

    School of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, China;

    School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;

    School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;

    Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    aliphatic polycarbonate; terpolymer; thermal properties; thermal degradation kinetics;

    机译：脂族聚碳酸酯;三元共聚物热性能;热降解动力学;

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