本文選題：單電子轉(zhuǎn)移活性自由基聚合 + 星形聚丙烯酰胺�。� 參考：《東北石油大學(xué)》2011年碩士論文

【摘要】：本文采用SET-LRP方法,分別在水溶液和離子液體中合成了具有反聚電解質(zhì)溶液行為的線性丙烯酰胺(AM)與甲基丙烯酰氧乙基-N,N-二甲基-N-丁磺酸銨鹽(DMBS)共聚物和四臂星形聚丙烯酰胺(SPAM),并考察了溶劑、催化劑、引發(fā)劑和溫度等因素對聚合反應(yīng)動(dòng)力學(xué)的影響,其主要內(nèi)容如下: 1、以季戊四醇為原料,在改良實(shí)驗(yàn)條件的情況下反應(yīng)制得高產(chǎn)率、高純度的2,2-二溴甲基-1,3-二溴丙烷(PEBr_4)四官能團(tuán)引發(fā)劑,并以此為核引發(fā)AM的SET-LRP;且參照文獻(xiàn)成功合成了電子供體配位能力較強(qiáng)且高度自旋多齒配體Me6-TREN和電中性的磺基甜菜堿型兩性離子功能單體;并通過IR和~1H NMR等表征手段對產(chǎn)物進(jìn)行了結(jié)構(gòu)分析,證實(shí)為目標(biāo)產(chǎn)物,且純度較高。 2、以Cu~0/Me_6-TREN[三(N,N-二甲基氨基乙基)胺]為催化劑,2-氯丙酰胺(CPA)為引發(fā)劑,在25℃水溶液中通過SET-LRP實(shí)現(xiàn)了AM與DMBS的共聚合,制備出線性的、具有反聚電解質(zhì)溶液行為的共聚物。通過~1H NMR、GPC對所合成的P(AM-co-DMBS)進(jìn)行了分析表征,證明所制備的聚合物確為目標(biāo)產(chǎn)物,并具有較窄的分子量分布M_w/M_n=1.33(M_n~(GPC)=3.01×10~4,轉(zhuǎn)化率為82%),且聚合物鏈端保留了α-Br端基�？疾炝巳軇�、催化劑、引發(fā)劑和溫度對聚合反應(yīng)的影響;并研究了AM和DMBS共聚物的鹽溶液性質(zhì),兩性離子聚合物與三種鹽溶液都表現(xiàn)出很好的反聚電解質(zhì)溶液行為,隨鹽濃度的增加聚合物溶液的表觀粘度增加。 3、以Cu~0/Me_6-TREN為催化劑,季戊四溴為引發(fā)劑,在40℃離子液體中實(shí)現(xiàn)了丙烯酰胺(AM)的單電子轉(zhuǎn)移活性自由基聚合(SET-LRP),得到了窄分子量分布的四官能度星形PAM,M_w/M_n≈1.26(M_n~(GPC)=14.1×103,轉(zhuǎn)化率為43.4%)。采用1H NMR對SPAM結(jié)構(gòu)進(jìn)行表征,并采用GPC測定了SPAM的分子量及分子量分布;考察了水、催化劑和引發(fā)劑用量對聚合反應(yīng)的影響。
[Abstract]:The SET-LRP method is used in this paper. The copolymers of linear acrylamide (AM) and methacryloxy ethoxyethyl N-dimethyl-n-butylammonium sulfonate (DMBS) and four-arm star-shaped polyacrylamide (SPAM) were synthesized in aqueous solution and ionic liquid respectively. The main contents of the effects of catalyst, initiator and temperature on the kinetics of polymerization are as follows: 1. Using pentaerythritol as raw material, the high yield was obtained under improved experimental conditions. High purity 2-dibromomethyl-1-tribromopropane (PEBr4) tetrafunctional initiator, The SET-LRPwas used as the nucleus to initiate AM, and the highly spin polydentate ligand Me6-TREN and the electrically neutral sulfobetaine amphoteric functional monomer were successfully synthesized by referring to the literature. The product was characterized by IR and 1H NMR. The product was confirmed to be the target product with high purity. 2. Cu0 / Mex 6-TREN [tris (N- (N- (N-dimethyl aminoethyl) amine)] as catalyst was used as initiator, and 2-chloropropionamide (CPA) was used as initiator. The copolymerization of AM and DMBS was carried out by SET-LRP in aqueous solution at 25 鈩，

本文編號：2112662