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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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β-CD聚轮烷嵌段共聚物的制备及其溶致响应性
DOI: 10.11777/j.issn1000-3304.2015.14437, PP. 800-807
Keywords: 原子转移自由基聚合,聚轮烷,丙烯酸羟乙酯,β-环糊精,自组装
Abstract:
在20℃水溶液中,选用PMDETA/Cu(Cl)为催化剂,以2-溴代异丁酰基封端的PPO-PEO-PPO三嵌段共聚物与β-环糊精(β-CD)形成的聚准轮烷(PPR)作为引发剂引发丙烯酸羟乙酯(HEA)发生非均相ATRP反应.1H-NMR,GPC,FTIR,WXRD,DSC以及TGA测试表明,PHEA已连接到PPR两端生成了具有管道结晶结构的聚轮烷嵌段共聚物.聚轮烷中β-CD上链量以及PHEA链段聚合度能通过改变其投料摩尔比予以调控.观察到经过用水透析处理后的聚轮烷,β-CD只停留在PPO链段上.而经DMF溶解和无水乙醚沉淀后,大约有1/3的β-CD滑向中间的PEO链段上.表明该聚轮烷嵌段共聚物具有溶致响应性.
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