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Using the Ozawa method to study the thermally initiated curing kinetics of vinyl ester resin

机译：使用ozawa方法研究乙烯基酯树脂的热引发固化动力学

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摘要

In this study, a thermal initiator of 1,1-bis(t-hexylperoxy)-3,3,5-trimethyl cyclohexane was introduced to thermally initiate the curing of vinyl ester resin, and then a dynamic differential scanning calorimetry method was applied to investigate the thermally initiated curing procedures. Thermally initiated by the thermal initiator under heating, the end double bonds of vinyl ester resin macromolecules were opened to accomplish the crosslinking, polymerizing, and curing. The increasing thermal initiator advanced the curing procedures and shifted the initial temperature, exothermic peak temperature, and final temperature to a low temperature zone. The curing kinetics of thermally initiated vinyl ester rein was studied using the Ozawa method and deduced by assuming a constant activation energy. The thermally initiated curing kinetic equations, e. g., d alpha/dt = e(30.16)(1 -alpha) (2.88) alpha (0.01)e-(106.60)/(RT), d alpha/dt = e(29.43)(1 - alpha) (2.72) alpha (0.16)e (-105.17)/(RT), d alpha/dt = e(29.43)(1 -alpha) (2.85) alpha (0.03)e (-104.48)/(RT,) d alpha/dt = e(29.41)(1 -alpha) (2.87) alpha (0.01)e(-104.11)/(RT), d alpha/dt = e(27.70)(1 -alpha) (2.64) alpha (0.05)e -(99.63)/(RT), and d alpha/dt = e(26.26)(1 -alpha) (2.32) alpha (0.30)e (-96.16)/(RT), respectively corresponding to the weight ratios between the thermal initiator and the vinyl ester resin at 0.5 : 100, 1 : 100, 2 : 100, 3 : 100, 4 : 100, and 5 : 100, were obtained. The increasing thermal initiator significantly influenced the thermally initiated curing kinetic parameters, such as the exothermic peak temperature, the fractional extent conversion, the rate of conversion, the overall order of reaction, the activation energy, the preexponential factor, and the reaction rate constant, and the thermally initiated curing kinetic equations. The data calculated from the kinetic equation agreed well with the experimental data, showing that the Ozawa method could evaluate the curing kinetics effectively.
机译：在这项研究中，被引入的1,1-双（叔己基过氧）-3,3,5-三甲基环己烷的热引发剂以热引发乙烯基酯树脂的固化，然后动态差示扫描热量法应用于调查热引发固化过程。通过在加热下热引发剂热引发，乙烯基酯树脂的大分子的末端双键被打开以实现交联，聚合和固化。日益增加的热引发剂提出的固化过程和移位初始温度，放热峰温度，并且最终温度至低温区域。使用Ozawa法热引发乙烯基酯缰绳的固化动力学进行了研究，并通过假定恒定的活化能推导。热引发固化动力学方程，E。例，d阿尔法/ DT = E（30.16）（1-α）（2.88）α（0.01），E-（106.60）/（RT），d阿尔法/ DT = E（29.43）（1 - α）（2.72 ）α（0.16）E（-105.17）/（RT），d阿尔法/ DT = E（29.43）（1-α）（2.85）α（0.03）E（-104.48）/（RT）d的α/ dt的= E（29.41）（1-α）（2.87）α（0.01）E（-104.11）/（RT），d阿尔法/ DT = E（27.70）（1-α）（2.64）α（0.05）在线 - （99.63）/（RT），和d的α/ DT = E（26.26）（1-α）（2.32）α（0.30）E（-96.16）/（RT），分别对应于所述热引发剂之间的重量比并在0.5乙烯基酯树脂：100,1：100,2：100,3：100,4：100，和5：100，获得。日益增加的热引发剂显著影响所述热引发的固化动力学参数，如放热峰温度，分数范围转换，转化率，反应的总顺序，活化能，指前因子和反应速率常数，和热引发固化动力学方程。由动力学方程计算的数据与实验数据吻合良好，显示出小泽方法可有效地评价固化动力学。

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  • 来源
    《RSC Advances》 |2015年第4期|共7页
  • 作者

    Cui Hui-Wang; Suganuma Katsuaki; Uchida Hiroshi;

  • 作者单位

    Osaka Univ Inst Sci &

    Ind Res Ibaraki Osaka 567 Japan;

    Osaka Univ Inst Sci &

    Ind Res Ibaraki Osaka 567 Japan;

    Inst Polymers &

    Chem Business Dev Ctr Ichihara Chiba 2900067 Japan;

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  • 正文语种 eng
  • 中图分类 化学;
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