作者:Guang-Tao Chen、Chun-Hao Wang、Jia-Guang Zhang、Yang Wang、Rui Zhang、Fu-Sheng Du、Ning Yan、Yuan Kou、Zi-Chen Li
DOI:10.1021/ma101636m
日期:2010.12.14
In addition, aldehyde, epoxy, and acetylene groups were introduced to the (co)polymer chains as reactive groups; model reactions of these groups with other molecules were very efficient and simple. Thus, these polymers can subsequently be modified to impart additional functionality to be used as thermoresponsive polymers for bioconjugation. Finally, these polymers are demonstrated to be at least as
合成了一系列在N-乙烯基-2-吡咯烷酮(NVP)3位具有不同取代基的新单体。取代基包括简单的烷基(甲基,乙基,丙基和异丙基),醚(甲氧基乙基和乙氧基乙基)和官能团(例如醛,环氧基和乙炔)。这些单体进行自由基共聚,以生成基于聚N的一系列共聚聚合物。-乙烯基-2-吡咯烷酮)(PVP),并且可以通过改变共聚单体进料比来控制共聚物组成。当单体被含乙基,甲基或醚的烷基链取代时,它们的均聚物可溶于冷水,但加热至浊点温度(CP)时显示出敏感且可逆的相变。通过改变取代基的亲水性来控制均聚物的CP。CP也可以通过不同单体的共聚或向聚合物水溶液中添加NaCl来调节。通过温度依赖性1研究了热响应特性的机理。1 H NMR和微量量热法。结果证实,即使在远高于CP的温度下,带有醚取代基的(共)聚合物的相变与较低的相变焓和较少的脱水也没有协同作用,并且过渡主要是液态到液态。另外,将醛,环氧基和乙炔基团作为反应性基团引