Malardier-Jugroot C, van de Ven T G M, Whitehead M A
Department of Chemistry, McGill University, Montreal, Canada, and Pulp and Paper Research Centre, McGill University, Montreal, Canada.
J Phys Chem B. 2005 Apr 21;109(15):7022-32. doi: 10.1021/jp0450944.
A careful conformational analysis of poly(styrene-alt-maleic anhydride) at different pH values is presented. It is found that a strong internal hydrogen bond is formed at intermediate pH, which induces a change in the conformation of the polymer chain, which becomes linear. This linearity does not depend on the chirality of the polymer. The linearity of the chain occurs only at intermediate pH and can explain the association among the chains observed by dynamic light scattering at pH 7.
本文对不同pH值下的聚（苯乙烯-alt-马来酸酐）进行了细致的构象分析。研究发现，在中等pH值下会形成强烈的分子内氢键，这会导致聚合物链的构象发生变化，使其变为线性。这种线性不依赖于聚合物的手性。链的线性仅在中等pH值时出现，并且可以解释在pH 7时通过动态光散射观察到的链间缔合现象。
