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用傅里叶变换红外光谱法(FT-IR)、差示扫描量热法(DSC)、广角X射线衍射法(WAXD)研究了少量过渡金属盐氯化铜(CuCl2)对聚乙二醇(PEG)构象和结晶行为的影响.Cu2+与PEG分子链中的氧原子有配位键生成,通过溶液电导率的测定,发现一个Cu2+大约与3个PEG链节单元形成配位结构,从而使PEG的构象和结晶行为发生变化,随着体系中CuCl2含量的增加,PEG分子链中OC—CO旁式构象相对反式构象含量逐渐增加,在CuCl2含量(w)为7%左右时达到极大值,在CuCl2含量(w)为9%时,反而是反式构象相对旁式构象含量多些.混合物中PEG的结晶度随着体系中CuCl2含量的增加逐渐降低,含量(w)为9%时,又有所提高.
The effects of a small amount of transition metal salt of copper chloride (CuCl2) on the mechanical properties of polyethylene glycol ( PEG) conformation and crystallization behavior.Cu2 + has a coordination bond with the oxygen atom in the molecular chain of PEG.A solution of Cu2 + was found to form a coordination structure with about 3 PEG units through the measurement of solution conductivity, so that PEG The conformational and crystallization behaviors of OC-CO congeners changed gradually with the increase of CuCl2 content in the system, and the relative trans conformational content of OC-CO conformers in PEG chains gradually increased. When the CuCl2 content (w) was about 7% , But the content of trans conformation is more than that of side conformation when CuCl2 content (w) is 9% .The crystallinity of PEG in the mixture decreases gradually with the increase of CuCl2 content in the mixture, when the content (w) is 9% , But also improved.