本文選題：溫敏 + pH響應(yīng)性　； 參考：《高分子學報》2016年05期

【摘要】：以2-溴代異丁酸乙酯為引發(fā)劑,Cu Br/PMDETA為催化體系,通過原子轉(zhuǎn)移自由基聚合(ATRP)方法,合成了寡聚乙二醇甲基丙烯酸酯與丙烯酸叔丁酯的嵌段共聚物(PMEO2MA-b-Pt BA);通過水解脫去共聚物中丙烯酸叔丁酯嵌段上的叔丁基,使丙烯酸叔丁酯嵌段轉(zhuǎn)化為丙烯酸嵌段,得到寡聚乙二醇甲基丙烯酸酯與丙烯酸的嵌段共聚物(PMEO2MA-b-PAA).通過溶液透光率和動態(tài)光散射(DLS)等方法,表征了合成得到的嵌段共聚物的溫敏性能和p H響應(yīng)性,發(fā)現(xiàn)嵌段共聚物在24~30℃,p H=4~8的范圍內(nèi)發(fā)生親水性性質(zhì)轉(zhuǎn)變.以二環(huán)己基碳二亞胺(DCC)為縮合劑,在4-二甲氨基吡啶(DMAP)的催化下使PMEO2MA-b-PAA上的羧基與蠶絲上的氨基發(fā)生縮合反應(yīng),從而令共聚物接枝到蠶絲上,通過接觸角和回潮率的測試發(fā)現(xiàn)改性后的蠶絲在28~42℃具溫敏性,較共聚物的轉(zhuǎn)變溫度有所升高,其轉(zhuǎn)變溫度隨p H的增大而上升.
[Abstract]:Using 2-bromo-isobutyrate as initiator, Cu Br-p-PMDETA was used as catalyst system, and atom transfer radical polymerization (ATRP) method was used. The block copolymers of poly (ethylene glycol methacrylate) and tert-butyl acrylate (TBA) were synthesized, and the tert-butyl acrylate block was transformed into acrylic block by hydrolysis of tertiary butyl acrylate block (Ding Ji). A block copolymer of poly (ethylene glycol methacrylate) and acrylic acid (PMEO _ 2MA-b-PAA) was obtained. The temperature sensitivity and pH response of the synthesized block copolymers were characterized by means of solution transmittance and dynamic light scattering (DLSs). It was found that the block copolymers changed their hydrophilic properties in the range of 24 ~ 30 鈩，

本文編號：2039285