聚酯-聚酯多嵌段共聚物序列结构研究

利用对苯二甲酸乙二酯-己内酯多嵌段共聚物质子谱中各官能团的特征共振吸收峰计算证明两种吸收强度关系式反映了软链段和硬链段中相应官能团的数量关系,从而进一步肯定了所提出的链化学结构,在此基础上又直接利用各种官能团对其质子谱中特征吸收峰的强度贡献,计算得到多嵌段共聚物中软硬链段数,软硬链段平均长度,分子量和硬链段重量百分数的表示式。本文最后一部分用三素组的几率计算方法对多嵌段共聚物的质子谱和~(13)C谱分析讨论,所得有关链结构的数量关系是合理的,进一步证实了质子谱的直接计算法。

STUDY ON SEQUENCE STRUTURE OF POLYESTER-POLYSTER SEGMENTED COPOLYMER

Using the characteristic peaks in H-spectra for the different functional groups of ethyle-ne terephthalate-caprolectone segmented copolymer, We have calculated and proved that two kinds of the intensity formulas reflect the quantitative relationships of the coresponding functional groups in the hard and soft segments, and the chemical structure of the chain is confirmed.On the basis of this, utilizing the contribution of the different functional groups to their characteristic peaks in H-spectra, the formulas for the number of soft and hard segments, for the average length and molecular weight of the soft and hard segments and for the content of the hard segments have been found directly.The H-spectra and C-spectra have been analysed by the method of the probability of the triad and the result reconfirmed the chain structure of segmented copolymer that we got before.