POLYETHERS DERIVED FROM BISPHENOLS AND HIGHLY FLUORINATED AROMATICS

被引:50
作者
IRVIN, JA
NEEF, CJ
KANE, KM
CASSIDY, PE
TULLOS, G
STCLAIR, AK
机构
[1] SW TEXAS STATE UNIV,DEPT CHEM,SAN MARCOS,TX 78666
[2] DOW CHEM CO USA,FREEPORT,TX 77541
[3] NASA,LANGLEY RES CTR,HAMPTON,VA 23665
关键词
FLUOROPOLYMERS; LOW DIELECTRIC CONSTANT; THERMALLY STABLE; AROMATIC POLYETHERS;
D O I
10.1002/pola.1992.080300820
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A series of fluorinated aromatic polyethers was synthesized via aromatic nucleophilic substitution of highly fluorinated aromatics (1,2,4,5-tetrafluorobenzene, hexafluorobenzene, and decafluorobiphenyl) with bisphenol AF or bisphenol A. Polymerization with 1,2,4,5-tetrafluorobenzene was not observed, and polymerization of hexafluorobenzene with bisphenol proceeded only if the potassium carbonate-bisphenol ratio was carefully controlled. The polymer condensed from decafluorobiphenyl and bisphenol AF was prepared in 77% yield with an inherent viscosity of 1.01 dL/g. The polymer prepared from the condensation of decafluorobiphenyl with bisphenol A was obtained in 48% yield with an inherent viscosity of 0.28 dL/g. These polymers were very soluble in common organic solvents, formed clear, colorless films, and were thermally stable (> 450-degrees-C by TGA). The fully fluorinated polymer exhibited low water uptake (0.3%) and dielectric constant (2.17).
引用
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页码:1675 / 1679
页数:5
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