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首页> 外文期刊>Journal of Applied Polymer Science >Libraries of modified polyacrylamides using post-synthetic modification
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Libraries of modified polyacrylamides using post-synthetic modification

机译：使用合成后修饰的改性聚丙烯酰胺库

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Polyacrylamide-based (PAM) polymers are the most widely used synthetic water-soluble polymer so they are applied in a range of industries. However, they suffer from a number of limitations which requires the development of synthetic routes that can accurately control polymer structure and hence function. This study describes a carbodiimide mediated coupling reaction (CMC) that is used to generate modified polyacrylamide (PAM) including hydrophobically modified water-soluble polymers (HMWSP). The reaction proceeds efficiently in water and does not require organic solvents or high temperatures. The approach is flexible due to the efficiency of the CMC reaction allowing for accurate control over polymer structure and function. This is confirmed using acid-base titration, spectroscopy, viscometry, and rheology. The viscosity of the polymers varies over a broad range with those containing larger hydrophobic group (dodecyl) showing the highest viscosity. The hydrophobicity of the pendent group determines how it influences viscosity and using this new synthetic approach polymer with the same molecular weight can be compared. Linear hydrocarbon pendent groups are more hydrophobic than the cyclic versions resulting in higher viscosity. However, the spatial arrangement of the pendent group (linear or cyclic) also affects the viscosity at higher pendent group contents. The number of modified PAMs that can be generated is expansive because the approach works with a number of different functional groups and base polymers. (C) 2015 Wiley Periodicals, Inc.
机译：聚丙烯酰胺基（PAM）聚合物是使用最广泛的合成水溶性聚合物，因此已在许多行业中得到应用。但是，它们具有许多局限性，需要开发能够精确控制聚合物结构并因此起作用的合成路线。这项研究描述了碳二亚胺介导的偶联反应（CMC），可用于生成包括疏水改性的水溶性聚合物（HMWSP）的改性聚丙烯酰胺（PAM）。该反应在水中有效地进行，不需要有机溶剂或高温。由于CMC反应效率高，因此该方法具有灵活性，可以精确控制聚合物的结构和功能。使用酸碱滴定，光谱学，粘度测定和流变学可以证实这一点。聚合物的粘度在宽范围内变化，其中包含较大疏水基团（十二烷基）的聚合物显示最高粘度。侧基的疏水性决定了它如何影响粘度，使用这种新的合成方法，可以比较具有相同分子量的聚合物。直链烃侧基比环状基团更疏水，从而导致更高的粘度。但是，侧基的空间排列（线性或环状）也会影响较高侧基含量时的粘度。由于该方法适用于许多不同的官能团和基础聚合物，因此可以生成的修饰PAM数量众多。 （C）2015年Wiley Periodicals，Inc.

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