A macrocyclic aromatic thioether ketone: Synthesis, structure and anionic ring-opening polymerisation
A macrocyclic aromatic thioether ketone: Synthesis, structure and anionic ring-opening polymerisation
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DOI：
10.1039/a607044b
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发表时间：
1997-01-01
影响因子：
--
通讯作者：
Williams, DJ
中科院分区：
文献类型：
--
作者：
Colquhoun, HM;Lewis, DF;Williams, DJ
苯-1，3-二硫醇与4，4‘-二氟二苯甲酮在高浓度下的亲核缩聚反应不仅得到了线性聚合物1，而且还得到了大量的环状低聚物，主要是[2+2]环二聚体2。在高稀释条件下，2成为主要的反应产物。大环2已被分离，用单晶X-射线方法表征其结构，并发现在熔体(330-360℃)中进行快速阴离子开环聚合，得到线性、高相对分子质量的聚芳硫醚酮。
Nucleophilic polycondensation at high concentration between benzene-1,3-dithiol and 4,4'-difluorobenzophenone affords not only linear polymer 1 but also a significant yield (ca. 8%) of cyclic oligomers, mainly the [2+2] cyclodimer 2. Under high-dilution conditions 2 becomes by far the major reaction product. Macrocycle 2 has been isolated, structurally characterised by single-crystal X-ray methods and found to undergo rapid anionic ring-opening polymerisation in the melt (330-360 degrees C), affording a linear, high molecular weight poly(arylthioether ketone).