Investigation of isothermal curing behaviour during the synthesis of polybenzoxazine-layered silicate nanocomposites via cyclic monomer
作者： Zixing Shi , Ding Sheng Yu , Yizhong Wang , Riwei Xu
DOI: 10.1016/S0014-3057(01)00228-2
关键词: Catalysis 、 Activation energy 、 Reaction rate constant 、 Order of reaction 、 Curing (chemistry) 、 Differential scanning calorimetry 、 Chemical engineering 、 Composite material 、 Isothermal process 、 Autocatalysis 、 Materials science
摘要: Abstract The curing reaction in the synthesis of polybenzoxazine (PBZ)–montmorillonite (MMT) nanocomposites was studied by differential scanning calorimetry isothermal mode. experimental data obtained provided evidence that behaviour showed autocatalytic characteristics. Owing to effects catalysis and barrier MMT, model proposed Khanna [J. Appl. Polym. Sci. 49 (1993) 319], which includes two rate constants, k1 k2 as well orders, m n could give fairly good description whole range at relatively high temperatures such 175, 180 °C even stage diffusion control, is quite different from pure PBZ, addition with calculations activation energy overall order.
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