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首页> 外文会议>PMSE Symposia >Phase Behavior of Random Copolymer Solutions with Adjustable Co-monomer Sequence Distribution
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Phase Behavior of Random Copolymer Solutions with Adjustable Co-monomer Sequence Distribution

机译：可调节共聚物序列分布随机共聚物溶液的相位行为

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Over the past half a century, the physico-chemical characteristics of homopolymers or heteropolymers with ordered co-monomer sequence distributions have been studied experimentally and theoretically as a function of temperature, pressure, concentration, molecular weight, isotope substitution, solvent quality, polydispersity, and etc. In spite of these efforts, limited understanding exists about synthetic random copolymer (RCP) systems, primarily due to a limited number of available synthetic methods available for preparing RCPs having precise control of chemical sequences of monomeric constituents. The understanding of the thermodynamic behavior of artificial RCPs can improve knowledge aiming at phase behavior of (i.e., microscopic mechanisms of nucleation and subsequent growth processes) natural heteropolymers, such as proteins or enzymes. We have recently developed and reported on a facile synthetic methodology for preparing RCPs with adjustable co-monomer sequence distributions by utilizing the “coloring scheme” proposed originally by the Khokhlov group in their computer simulations studies. Our previous work9 indicated that “truly random” co-monomer sequences are achieved by brominating polystyrene chains in good solvents while “random-blocky” co-monomer sequences are generated when the bromination occurs under moderately poor solvent conditions for both the parent homopolymer and the resultant RCP.
机译：在过去的一半半个半个世纪中，通过实验和理论地研究了具有有序共聚序列分布的均聚物或杂多聚合物的物理化学特性，作为温度，压力，浓度，分子量，同位素取代，溶剂质量，多分散性，尽管有这些努力，但是关于合成无规共聚物（RCP）系统存在有限的理解，主要是由于可用于制备具有精确控制单体成分的化学序列的RCP的有限数量的可用合成方法。对人工RCP的热力学行为的理解可以改善瞄准（即，核细胞微观机制和随后的生长过程的微观机制）天然杂多聚合物的知识，例如蛋白质或酶。我们最近开发并报告了一个浅显的合成方法制备垃圾收集站与利用“配色方案”在他们的计算机模拟研究霍赫洛夫组最初提出的可调共聚单体序列分布。我们以前的工作9表明，当溴化在母体均聚物的中等溶剂条件下发生溴化时产生“无随机嵌块”共聚单体序列，通过溴化聚苯乙烯链来实现“真正随机”共单体序列。结果RCP。

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