马来酸酐改性PVB水性化接枝物的热分解动力学  

Thermal decomposition kinetics of the malice anhydride modified PVB water-soluble grafts

作　　者：方瑞娜[1] 姚新鼎[1] 崔鹏[1] 王宗舞[1] 刘国际[1,2] 

机构地区：[1]黄河水利职业技术学院环化系,河南开封475004 [2]郑州大学化工与能源学院,河南郑州450001

出　　处：《热固性树脂》2013年第6期19-24,共6页Thermosetting Resin

基　　金：河南省教育厅科学技术研究重点项目(13A530616)资助

摘　　要：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。The malice anhydride modified polyvinyl butyral （PVB） grafts （ MPVB - M） and its water borne product WPVB - M were prepared. The structure of MPVB - M was characterized by IR and 1H NMR. The thermal decom- position kinetics of WPVB - M was investigated by Flynn - Wall - Ozawa （ FWO）, Kissinger and Starink method and the kinetic parameters were obtained. The thermal decomposition mechanism was also studied with Coast - Red- fern method. The results showed that the activation energy values of WPVB - M obtained by different multi - rate scanning method were closer. The pre - exponential factor of two - step decomposition obtained by Kissinger method was 34. 76 and 32. 79, respectively. The kinetic equation of the two - step thermal decomposition of WPVB - M could be expressed asG（α）=[1n（1-α）-1]3,G（d）=[In（1-α）-1]4. respectively.

关 键 词：聚乙烯醇缩丁醛 马来酸酐 接枝改性 热分解动力学 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]