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作 者:邱兆斌[1] 周宏伟[2] 莫志深中国科学院长春应用化学研究所高分子物理联合开放实验室 张宏放[1] 吴忠文[2]
机构地区:[1]中国科学院长春应用化学研究所高分子物理联合开放实验室,长春130022 [2]吉林大学化学系,长春130023
出 处:《高等学校化学学报》2000年第8期1328-1330,共3页Chemical Journal of Chinese Universities
基 金:国家自然科学基金! (批准号 :2 96740 2 9);国家"863"项目资金! ( 863 -2 -7-3 -3 )
摘 要:Crystallographic equivalence of ether and ketone in all para substituted PAEKs crystallized in form Ⅰ was discussed in this paper. In a word, crystallographic equivalence between ether and ketone groups is tenable when polymer contains only phenyl rings in the repeat unit. If a polymer contains a diphenyl group in the repeat unit, two cases should be distinguished. In the case of PEDEKK and PEEKDK, crystallographic equivalence between ether and ketone linkages is untenable. However, in the case of PEDK and PEDEKDK, crystallographic equivalence between ether and ketone linkages is still tenable.Crystallographic equivalence of ether and ketone in all para substituted PAEKs crystallized in form Ⅰ was discussed in this paper. In a word, crystallographic equivalence between ether and ketone groups is tenable when polymer contains only phenyl rings in the repeat unit. If a polymer contains a diphenyl group in the repeat unit, two cases should be distinguished. In the case of PEDEKK and PEEKDK, crystallographic equivalence between ether and ketone linkages is untenable. However, in the case of PEDK and PEDEKDK, crystallographic equivalence between ether and ketone linkages is still tenable.
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