环氧树脂与树状大分子PAMAM的等温固化反应动力学研究  

Study on Curing Kinetics of Epoxy Resin with Dendritic Polymer PAMAM by Isothermal DSC

作　　者：林显竣[1] 张力[1,2] 区伟珍[1] 

机构地区：[1]华南师范大学化学与环境学院,广东广州510006 [2]广东工业大学材料与能源学院,广东广州510006

出　　处：《华南师范大学学报（自然科学版）》2012年第2期85-89,共5页Journal of South China Normal University(Natural Science Edition)

基　　金：广东省高等学校科技创新重点项目(CXZD1021)

摘　　要：以等温DSC法研究了在60、65、70、75℃下,环氧树脂E-44和树状大分子聚酰胺-胺(PAMAM)体系的固化反应动力学过程,结果表明该固化反应符合自催化反应模型.通过Kamal方程计算出各固化动力学参数,其中反应总级数m+n在2.13～2.21之间,反应活化能E1和E2分别为52.65、65.47 kJ/mol.由于固化后期受扩散控制,且温度越低扩散控制越显著,引入扩散因子f(α)对Kamal模型进行修正,其修正模型能更好地描述固化全过程.The curing reaction kinetics of epoxy resin and dendritic polymer PAMAM was investigated under iso- thermal curing condition using Differential Scanning Calorimeter （DSC） at 60, 65, 70 and 75℃. It was found that the curing reaction of the PAMAM and epoxy resin system have autocatalyzed controlled characteristics. All parame- ters of isothermal curing kinetics were determined by an autocatalytic mechanism proposed by Kamal eqution. The overall reaction order m ＋ n was between 2. 13 and 2. 21, and the apparent activation energies of E1 and E2 were 52. 65 kJ/mol and 65.47 kJ/mol. Since, in the later curing stage, the curing reaction was affected by the diffusion - controlled, and the effect of the diffusion was much evident at a lower temperature, a diffusion factor f（a） was introduced into the Kamal model. The revised cure kinetic model agreed better with the whole curing process, espe- cially in the later curing stage controlled by diffusion.

关 键 词：等温DSC 环氧树脂 树状大分子PAMAM 固化动力学 扩散控制 

分 类 号：J653[艺术—音乐]