PDF全文下载：2011030248
张鹏
（青岛科技大学 化学与分子工程学院, 山东 青岛 266042）
摘要: 以丙烯酰氯和乙二胺为原料制得N-(2-氨基乙基)-丙烯酰胺，然后聚合成聚N-(2-氨基乙基)-丙烯酰胺(PAEAA)，再分别用二环己基甲烷二异氰酸酯（HMDI）、1,6-己二异氰酸酯（HDI）交联得到2种网状结构的聚丙烯酰胺基聚脲，并用1H NMR，FT-IR表征聚脲的结构，用DSC，TGA/DTG测定其热性能。结果表明，聚合物的热分解过程主要有两个阶段：第一阶段由脲键断裂引起的失重，两种聚脲失重速率最大温度分别为358.8 ℃和360.7 ℃；第二阶段由聚丙烯酰胺主链断裂引起的失重，失重速率最大温度分别为471.0 ℃和467.2 ℃。合成的聚脲具有良好的热稳定性。
关键词: 聚丙烯酰胺； 聚脲； 二异氰酸酯； 交联
中图分类号: TB 324文献标志码： A
Synthesis and Characterization of PAEAA-based Polyurea
ZHANG Peng
(College of Chemistry and Molecular Engineering，Qingdao University Science and Technology, Qingdao 266042, China)
Abstract: N-(2-aminoethyl)-acrylamide was prepared by reaction of acryl chloride with ethylene diamine and polymerized to produce poly\[N-(2-aminoethyl)-acrylamide\] (PAEAA). The PAEAA was then cross-linked with dicyclohexylmethylmethane-4, 4′-diisocyanate (HMDI) and 1,6-hexamethylene diisocyanate(HDI) to obtain two crosslinked PAEAA-based polyureas(P1 and P2). The PAEAA-based polyureas were characterized by IR and 1H NMR, and their thermal stabilities were investigated by DSC and TGA/DTG. The results showed that the thermal degradation of the polymers mainly consists of two stages: the first weight loss was due to the break of amide bond, during which the temperatures at the maximum weight-loss rates for P1 and P2 were 358.8 ℃ and 360.7 ℃ respectively; the second weight losses was due to the break of main chain of PAEAA, during which the temperatures at the maximum weight-loss rates for P1 and P2 were 471.0 ℃ and 467.2 ℃ respectively. The obtained PAEAA-based polyureas have good thermal stability.
Key words: polyacrylamide; polyurea; diisocyanate; cross-linking
收稿日期： 2011-11-12
基金项目： 山东省科技攻关计划项目(2006sk-18)；青岛科技大学博士基金项目(0022266).
作者简介： 张鹏（1984—），男，硕士研究生.
