| 聚硫聚氨酯(脲)的热稳定性 |
| |
| 引用本文： | 张俊生,全一武,陈庆民. 聚硫聚氨酯(脲)的热稳定性[J]. 高分子材料科学与工程, 2008, 24(1): 113-115,119 |
| |
| 作者姓名： | 张俊生 全一武 陈庆民 |
| |
| 作者单位： | 南京大学高分子科学与工程系,江苏,南京,210093;南京大学高分子科学与工程系,江苏,南京,210093;南京大学高分子科学与工程系,江苏,南京,210093 |
| |
| 摘 要： | 对一系列聚硫聚氨酯(脲)的热降解进行了研究,由异佛尔酮二异氰酸酯(IPDI)、甲苯二异氰酸酯(TDI)、液体聚硫橡胶(LP)以及2,5-二氨基-3,6-二甲硫基甲苯(E300)合成聚硫聚氨酯脲,用TG、DTA、ATR-IR等研究其热降解性能。结果表明,聚硫聚氨酯(脲)的降解分两个阶段。在200℃条件下老化一段时间后,聚硫聚氨酯仍保持大部分力学性能。
|
| 关 键 词： | 聚硫橡胶 聚氨酯 热降解 |
| 文章编号： | 1000-7555（2008）01-0113-03 |
| 收稿时间： | 2006-09-19 |
| 修稿时间： | 2007-01-17 |
Studies on the Degradation and Stability of Thermal Degradation in Polysulfide-Based Polyurea |
| |
| ZHANG Jun-sheng,QUAN Yi-wu,CHEN Qing-min. Studies on the Degradation and Stability of Thermal Degradation in Polysulfide-Based Polyurea[J]. Polymer Materials Science & Engineering, 2008, 24(1): 113-115,119 |
| |
| Authors: | ZHANG Jun-sheng QUAN Yi-wu CHEN Qing-min |
| |
| Affiliation: | (Department of Polymer Science & Engineering,Nanjing University,Nanjing 210093,China) |
| |
| Abstract: | The process and kinetics of thermal degradation in a series of polysulfide-based polyurea were studied by TG,DTA and ATR-IR.Polysulfide-based polyurea was synthesized by diisocyanates,liquid polysulfide(IPDI or TDI) and 2,5-diamino-3,6-dimethylmercaptotoluene(Ethacure-300).The result indicates that two degradation mechanisms operate in polysulfidebased polyurea.Thermal degradation activation energy of polysulfide-based polyurea is few higher than polyester polyurethanes′.With the increase in content of hard segment,the thermal stability increases.The effecttion of diisocyanates on thermal stability was discussed.At 200 ℃,the mechanical properties of polysulfide-based polyurea can kept mostly. |
| |
| Keywords: | polysulfide polyurea thermal degradation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
