| 摘要 |
A method of making a polymeric material is described, the method comprising contacting, for example polycondensing, a compound of formula: (I) with a compound of formula: (II) wherein each X is selected from a group comprising a chlorine and a fluorine atom, n represents 1, 2 or 3 and each Y is selected from a group comprising an alkali metal and a hydrogen atom. ® KIPO & WIPO 2008
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