【摘要】 本文用NMR波谱方法研究了无规共聚醚（EPO）的链结构。首先对EPO的¹H和¹³CNMR谱进行了讨论。并从序列结构随环氧丙烷（PO）含量的改变,分析了EPO的二元组序列和三元组序列结构,从¹³C实验谱中归纳出EPO的取代基参数（SCS）,清楚地揭示了EPO的¹³C谱,SCS参数和序列结构之间的关系,在此基础上计算了EPO系列共聚物的序列分布和数均序列长度。更多还原

【Abstract】 The chain struture of ethylene oxide/propylene oxide random copolyothers(EPC) is investigated by nuclear magnetic resonance(NMR). The 1~H NMR and (13)~C NMR spcetra of EPO are assigned, and the diads and triads of EPO are analyzed based on the change of sequence structure with the content of PO. The parameters of substituent chemical shift (SCS)of EPO are obtained from the (13)~C spectra. The relationship among the (13)~C spectra, SCS parameters and sequence structure of EPO are revealed clearly. According to this relationship, the sequence distribution and number average sequence length of ethylene oxide and propylene oxide segments are calculated.更多还原