dmaema基两亲性嵌段共聚物的atrp法合成与表征.pdf

安徽理工大学硕士学位论文 DMAEMA基两亲性嵌段共聚物的ATRP法合成与表征姓名:张宏艳申请学位级别:硕士专业:应用化学指导教师:徐国财 20110603 安徽理工大学硕士论文摘要摘要本文以甲基丙烯酸甲酯(MMA)()为原料制备了大分子引发剂(),以溴化亚铜为催化剂,五甲基二乙烯基三胺(PMDETA)为配体,采用原子转移自由基聚合(ATRP)制备聚甲基丙烯酸甲酯/,()。红外、核磁及凝胶色谱表明,-, 符合预期设计,进一步证明本实验室采取的ATRP聚合工艺行之有效。以聚乙二醇单甲醚(心EG)(BPB)为原料,制备了大分子引发剂Ⅱ,以溴化亚铜为催化剂,五甲基二乙烯基三胺(PMDEl’A) 为配体,,(DMAEMA)为单体,。红外、核磁及凝胶色谱表明, 聚合物具有预期结构,相对分子量分布窄且可控。将制得的双亲水性嵌段共聚物为基体,水为介质,硝酸银为前躯体,在无氧、避光、。红外、紫外及透射电镜表明带有叔胺基的双亲水性嵌段共聚物即可以做分散剂又可以做还原剂,在无氧、避光、不加任何还原剂的前提下,可将硝酸银还原为纳米银。这为纳米银的制备提供了一种新方法。‘采用锥板流变仪研究了双亲水性嵌段共聚物的温度敏感性。研究表明聚合物随着环境的变化如pH值的改变对聚合物的最低临界溶液温度(LCST)有重要影响。同时发现使用锥板流变仪测试聚合物敏感性要比其他手段更为敏感。图22表5参43 关键词:嵌段共聚物:LCST:复合材料安徽理工大学硕士论文 Abstract Abstract Themacroinitiator(PMMA—B0 was firstprepared from methyl methacrylate (MMA)and ethyl2-bromopropionate(EPN—BO inthispaper,.Then,atom transfer radical polymerization(ATRP)of 2-(Dimethylamino)ethyl methacrylate (D眦MA)was carried out using PMMA—Br as initiator,cuprous bromide as catalyst,PMDETA —I&1H-NMR and GPC analyses show that the synthesized PMMA-Br maeroinitiator and block copolymers (PMMA-b·PDMAEMA)have the desired s仃tlctIlrewithlow this way,the technology ofATRP、)I,ithsuitforOUl"laboratory was built. Themacroinitiator(mPEG-Br)WaS firstprepared frommethoxy poly(ethylene glyc01)(mPEG)and 2-Bromopropionyl hydrophilic block copolymers of2-(Dimethylamino)ethylmethaerylate(DMAEMA)block PEG were synthesized by ATRP uSiIlg mPEG·Br and勰initiator,cuprous bromide ascatalyst, PMDETA嬲the —IR,1H-NMR and GPC analyses indicate that the copolymedzation iswell controlledwith low posites ofmPEG—b-PDMAEMA as metrix WaSprepared bY silvernitrateas nano silverprecursor indarkandanaerobic solutionwithout any reducing agent orenergy. The resultantA。g/mPEG·b-PDMAEMA posites were