Self-assembled nucleating agents based on hydrogen bonding interactions have been increasingly used to manipulate the crystallization behavior of polymer materials, yet the specific working mechanism is not well unrevealed. In this study, the hydrazide-based nucleator structure of -(mono-methyl succinyl)dihydrazide (MSAD) is randomly incorporated in poly(butylene succinate) (PBS) chains to prepare a series copolymers of PBS--MSAD. It is confirmed that the multiple hydrogen-bonding interactions strengthen as the content of the MSAD segment increases, leading to a remarkable elevation of crystallization temperature. Meanwhile, the primary nucleation density of PBS is significantly raised without changing crystal modification. The formation of a pre-ordered network of hydrogen-bonding structures during non-isothermal crystallization is confirmed by rheological measurement and Fourier transform infrared spectroscopy investigation, which immediately induces the crystallization of PBS segments once strong enough. In addition, the melt crystallization mechanism of PBS--MSAD with heterogeneous hydrogen-bonding segments is elucidated in detail by combining a self-nucleation protocol.

中文翻译：

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通过基于酰肼的自组装氢键相互作用进行聚丁二酸丁二醇酯的结晶操作

基于氢键相互作用的自组装成核剂已越来越多地用于操纵聚合物材料的结晶行为，但具体的工作机制尚未完全揭示。本研究将基于酰肼的成核剂结构-(单甲基琥珀酰)二酰肼(MSAD)随机掺入到聚丁二酸丁二醇酯(PBS)链中，制备了一系列PBS-MSAD共聚物。经证实，随着MSAD链段含量的增加，多重氢键相互作用增强，导致结晶温度显着升高。同时，在不改变晶体改性的情况下，PBS的初级成核密度显着提高。通过流变测量和傅里叶变换红外光谱研究证实了非等温结晶过程中氢键结构的预定网络的形成，一旦足够强，它立即诱导 PBS 片段的结晶。此外，结合自成核方案，详细阐明了具有异质氢键片段的PBS--MSAD的熔融结晶机制。