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制备了马来酸酐改性聚乙烯醇缩丁醛(PVB)接枝物(MPVB-M)及MPVB-M的水性化产物WPVBM。采用红外、核磁氢谱对MPVB-M的结构进行了表征,采用Flynn-Wall-Ozawa(FWO)、Kissinger和Starink法对WPVB-M的热分解动力学进行了研究,求出其参数;利用Coast-Redfern法研究了WPVB-M的热分解机理。结果表明,不同多重速率扫描法求得的WPVB-M热分解的表观活化能较为接近;Kissinger法求得的两步分解的指前因子分别为34.76和32.79;WPVB-M的两步热分解动力学方程分别为G(α)=[ln(1-α)-1]3,G(α)=[ln(1-α)-1]4。
Maleic anhydride modified polyvinyl butyral (PVB) grafts (MPVB-M) and WPVBM were prepared. The structure of MPVB-M was characterized by IR and 1H-NMR. The thermal decomposition kinetics of WPVB-M was studied by using Flynn-Wall-Ozawa (FWO), Kissinger and Starink methods. -Redfern method to study the thermal decomposition mechanism of WPVB-M. The results show that the apparent activation energy of WPVB-M thermal decomposition obtained by different multi-rate scanning method is close to each other. The two-step decomposition pre-exponential factor obtained by Kissinger method is 34.76 and 32.79, respectively. The two-step thermal decomposition of WPVB- The kinetic equations are respectively G (α) = [ln (1-α) -1] 3, G (α) = [ln (1-α) -1] 4.