以丁二酸、1,4-丁二醇为原料,钛酸四丁酯为催化剂,采用熔融缩聚法合成了聚丁二酸丁二醇酯(PBS),然后将其与β-环糊精(β-CD)在二甲基亚砜(DMSO)中进行超分子自组装,制备了PBS与β-CD的包合物(PBSIC).通过红外光谱(FT-IR)、核磁共振氢谱(~1H-NMR)、广角X射线衍射分析(WAXD)、差示扫描量热分析(DSC)对产物的结构和性能进行了表征和测试.研究结果表明,PBS可以通过非共价键与β-CD内部羟基发生相互作用,稳定地存在于β-CD分子空腔中,形成管道状晶体结构,在β-CD的包裹下,PBS的结晶和熔融行为几乎消失.
Poly(butylene succinate) (PBS) with high molecule weight was synthesized by direct polycondensation of succinic acid and 1,4-butanediol, and catalyzed by tetrabutyl titanate. Then this polymer was assembled with β-cyclodextrin (β-CD) in dimethyl sulfoxide (DMSO) in order to form β-CD-PBS inclusion complex (PBSIC). This new polypseudorotaxane was studied by Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance spectra (~1H-NMR), wide angle X-ray diffraction (WAXD), and differential scanning calorimetry (DSC). The results indicate that PBS can interact with the hydroxyl groups inside the cavities of β-CD through non-covalent interactions, and form a channel crystal structure. Crystallization and melting behavior of PBS almost disappear in the inclusion complex due to the chains motion of PBS is limited by β-CD molecules.
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