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^(13)CNMR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^(13)C实验谱中归纳出EPO的取代基参数(SCS),清楚地揭示了EPO的^(13)C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。
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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第9期1015-1019,共5页
Chinese Journal of Analytical Chemistry
基金
吉林省科技委资助的应用基础研究项目
关键词
无规共聚醚
EPO
链结构
NMR
Nuclear magnotic resonance
Random copolyother
Chain structure
Substituont Chomical shift
