Thermal and mechanical studies on the cure time optimisation of polysulphide resin
Thermal and mechanical studies on the cure time optimisation of polysulphide resin
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DOI：
10.1007/bf01913041
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发表时间：
1989-07
期刊：
影响因子：
--
通讯作者：
K. Krishnan;K. Ninan
中科院分区：
文献类型：
--
作者：
K. Krishnan;K. Ninan
研究了两种市售金属氧化物固化剂PbO2和MnO2对聚硫醚聚合物的固化时间、固化动力学参数和极限拉伸强度的影响。根据热重数据估算了两个体系的热分解动力学参数。活化能和指前因子均随固化时间的增加而有规律地增加，反应后趋于平稳。在固化时间之后，还定期测定样品的机械性能。极限拉伸强力值和动力学参数随固化时间的变化趋势相似。PbO2固化多硫化物体系的动力学参数和极限拉伸强度均偏高。
The effect of two commercially available metal oxide curing agents, PbO2and MnO2, on the cure time, kinetic parameters and ultimate tensile strength of the polysulphide polymer was investigated. The kinetic parameters for the thermal decomposition of the two systems were evaluated from their TG data. Both the energy of activation and pre-exponential factor showed a systematic increase with increase in cure and levelled off after the reaction. The cure time was also followed by determining the mechanical properties of the samples at regular intervals. The ultimate tensile strength values and the kinetic parameters follow similar trend with respect to the cure time. The kinetic parameters and the ultimate tensile strength for the PbO2cured polysulphide system were on the higher side.