聚氧化乙烯改性聚酰胺-胺树状聚合物的合成与表征  

Synthesis and Characterization of Polyoxyethyiene Modified Polyamidoamine Dendrimers

作　　者：吴升[1] 彭晓宏[1] 林裕卫[1] 王庆涛[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《石油化工》2008年第12期1316-1319,共4页Petrochemical Technology

摘　　要：以1.0～5.0代聚酰胺-胺(PAMAM 1.0G～5.0G)树状聚合物及聚氧化乙烯-丙烯酰氯大单体(PEO-A)、聚氧化乙烯单甲醚-丙烯酰氯大单体(MPEO-A)为原料,通过双键和伯胺端基的 Michael 加成反应,对聚酰胺-胺(PAMAM)树状聚合物的伯胺端基进行改性,制备了一系列改性 PAMAM 树状聚合物。傅里叶变换红外光谱和核磁共振表征结果显示,改性后的产物中出现了多醚和酯基等特征官能团,证明成功地合成出改性 PAMAM 树状聚合物。热重分析结果显示,由 MPEO-A 改性的2.0代PAMAM 树状聚合物的最高失重温度为400.0℃,高于改性前的2.0代 PAMAM 树状聚合物的最高失重温度(261.2℃),表明改件后 PAMAM 树状聚合物的热稳定性明显提高。A series of modified polyamidoamine dendrimers were prepared from polyamidoamine （PAMAM） 1.0G -5.0G dendrimers, acryloyl polyoxyethylene mono-methyl ether macromonomer （ MPEO-A ） and acryloyl polyoxyethylene macromonomer （ PEO-A ）. PAMAM 1. 0G - 5. 0G dendrimers were modified by mechanism of Michael addition reaction occurred between primary amines terminal groups and PEO-A macromonomers or MPEO-A macromonomers. The structures of purified dendrimers were identified by mean of FTIR and ^1H NMR. Effects of addition of MPEO-A macromonomer and PEO-A macromonomer were investigated. The presence of the ether and ester functional groups indicated successful synthesis of modified PAMAM. Improvement of properties can be explained by results of TG. The modified PAMAM 2.0G with MPEO-A showed only single stage of weightloss at the temperature of 400. 0 ℃, much higher than that of PAMAM 2. 0G before modification（261.2 ℃ ） which indicated the thermal stabilities of modified PAMAM dendrimers were greatly improved.

关 键 词：聚氧化乙烯 聚氧化乙烯单甲醚 聚酰胺-胺 树状聚合物 MICHAEL加成 热稳定性 

分 类 号：TQ316.6[化学工程—高聚物工业]