论文部分内容阅读
采用酰氯法,用丙烯酰氯和不同相对分子质量的聚乙二醇为原料,制备出一系列具有丙烯酰端基的聚氧乙烯大单体(PEO-A)。实验证明,较佳的原料摩尔比n(PEG)∶n(CH2CHCOCl)∶n〔(CH3CH2)3N〕=2∶1∶1。然后以聚氧乙烯大单体为端基改性剂,在氮气保护下50℃四氢呋喃溶液中分别与G1.0～G4.0聚酰胺-胺树状聚合物进行Michael加成反应96h,合成出了聚氧乙烯(PEO)链封端的非离子型聚酰胺-胺树状聚合物,并用傅立叶变换红外光谱(FTIR)、核磁共振波谱(1HNMR,13CNMR)对其组成和结构进行了表征。
A series of polyoxyethylene macromonomers (PEO-A) with acryloyl end groups were prepared by the acid chloride method using acryloyl chloride and polyethylene glycol of different relative molecular masses as raw materials. Experiments show that the preferred molar ratio of raw materials n (PEG): n (CH2CHCOCl): n [(CH3CH2) 3N] = 2: 1: 1. Then, poly (ethylene oxide) macromonomer was used as modifier, Michael addition reaction with G1.0 ~ G4.0 polyamide-amine dendrimer was carried out for 96h under the protection of nitrogen in 50 ℃ tetrahydrofuran for 96h, respectively Poly (ethylene oxide) (PEO) chain terminated nonionic polyamide-amine dendrimers were synthesized and characterized by FTIR and 1HNMR spectra.