We prepared main chain-type polyrotaxanes by urea bond-forming polyaddition of a diamine axle-containing α-cyclodextrin (α-CD)-based pseudo[3]rotaxane to a macromolecular diisocyanate derived from poly(propylene glycol). Bulky isocyanate or aniline used as a comonomer worked as an effective stopper during the key step of the polyrotaxane synthesis. In the polymer preparation, the chain extension method worked effectively to increase the polymerization degree. Polyrotaxane was modified by the main chain extension and the cross-linking of hydroxyl groups of the CD wheels. The morphology and the effect of the rotaxane structure on the thermal and physical properties were evaluated. Some polymers exhibited sufficient toughness for industrial use. Because diamine-type pseudo[3]rotaxane is easily obtained on a large scale (100 g in a 1 L flask) from α-CD and 1,12-diaminododecane, this study contributes to the synthesis of various polyrotaxanes for actual use.

中文翻译：

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基于环糊精的假[3]轮烷二胺和高分子二异氰酸酯的主链型聚轮烷：合成，改性和表征。

我们通过将含二胺轴的基于α-环糊精（α-CD）的拟[3]轮烷与脲键形成的加成反应，制得聚丙二醇衍生的大分子二异氰酸酯，从而制备了主链型聚轮烷。在聚轮烷合成的关键步骤中，用作共聚单体的大体积异氰酸酯或苯胺可作为有效的塞子。在聚合物制备中，扩链方法有效地提高了聚合度。聚轮烷通过CD轮的主链延伸和羟基交联而改性。评价了轮烷结构的形态和对热和物理性质的影响。一些聚合物表现出足够的韧性以用于工业用途。