Two chemically dissimilar diblock copolymers, polybutadiene‐b‐poly(acrylic acid), PBd‐b‐PAA (M_w = 5.8–4 kg mol⁻¹) and poly(styrene)‐b‐poly(ethylene oxide), PS‐b‐PEO (M_w = 9–5 kg mol⁻¹) were blended in an effort to achieve morphologies typical of triblock copolymers. Blend compatibility was achieved by the hydrogen bond driven association of the PAA block of one diblock with the PEO block of the other. Small angle X‐ray scattering was used to determine the morphologies of the compositions, which were further investigated using transmission electron microscopy and selective staining techniques. The crystallinity of the PEO block was determined by differential scanning calorimetry. The hydrogen bond interactions between PEO and PAA yielded a complex triblock lamellar morphology of the form PS‐b‐(PEO/PAA)‐b‐PBd‐b‐(PEO/PAA). This morphology was stable when crystallization of PEO was suppressed by sufficient interaction with PAA.

中文翻译：

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氢键介导的两种二嵌段共聚物的自组装

两种化学上不同的二嵌段共聚物，聚丁二烯b聚丙烯酸（PBd b b PAA（M _w  = 5.8-4 kg mol ^-1）和聚苯乙烯b聚环氧乙烷，PS b ‐ PEO（M _w  = 9-5 kg mol ^-1进行共混以达到典型的三嵌段共聚物的形态。共混物相容性是通过一个双嵌段的PAA嵌段与另一个双嵌段的PEO嵌段的氢键驱动缔合实现的。小角X射线散射用于确定组合物的形态，并使用透射电子显微镜和选择性染色技术对其进行了进一步研究。通过差示扫描量热法确定PEO嵌段的结晶度。PEO和PAA之间的氢键相互作用，得到形式PS-的复合三嵌段层状形态b - （PEO / PAA） - b -PBd- b - （PEO / PAA）。当通过与PAA的充分相互作用抑制PEO的结晶时，这种形态是稳定的。