摘要
以硝化纤维(NC)、异佛尔酮二异氰酸酯(IPDI)三聚体、二羟甲基丙酸(DMPA)为原料,通过自乳化方法合成了水性硝化纤维(WNC)。通过傅里叶变换红外光谱(FT-IR)对目标产物的结构进行表征;采用热重法(TG)研究了WNC薄膜中硝化纤维基体的热分解行为;并分别采用Kissinger法、Ozawa法求解出热分解反应的活化能和频率因子等动力学常数,结合9种常用的动力学函数来判断WNC中硝化纤维基体的热分解机理函数。结果表明:水性硝化纤维基体的热稳定性明显提高,平均热分解活化能为221.31 kJ/mol、频率因子为1.108 2×1024s-1,热分解反应遵从Sigmoidal类型中的随机核化机理。
The self- emulsified waterborne nitrocellulose （WNC） was synthesized with ni- trocellulose（NC） for coating, isophorone diisocyanate（IPDI） trimer and dimethylol propionic acid（DMPA）. The structure of WNC was characterized by FT- IR. The thermal decomposi- tion of WNC was analyzed by TG. And the activation energy and pre - exponential factor were calculated by using Kissinger and Ozawa method. 9 types of commonly used kinetic functions were proposed to define the most probable thermal decomposition kinetic function. The results showed that the obtained average activation energy and per -exponential of the thermal decom- position were 221.31 kJ/mol and 1. 108 2 ×10^24 s^-1. The solid - state decomposition process follows a random nucleation mechanism in sigmoidal model.
出处
《涂料工业》
CAS
CSCD
北大核心
2013年第8期13-17,23,共6页
Paint & Coatings Industry
基金
陕西省教育厅2012年产业化培育项目(2012JC04)
