ハロゲン化p-ヒドロキシ安息香酸からのポリエーテルエステル
1978 年 34 巻 12 号 p. T551-T556
詳細
1978 年 34 巻 12 号 p. T551-T556
Polyether-esters having the following chemical formula were prepared from p-hydroxybenzoic acid by the successive processes of halogenation, etherification, esterification and polycondensation:
Effect of halogen substituent on synthesis and thermal properties of these polyether-esters were studied comparing with the polyesters (halogenated polyethylene terephthalates) reported previously. Intrinsic viscosities of polymers obtained were 0.42_??_0.58. Melting point measured by DTA decreased in the order of PEBCl2>PEBBr2=PEB>PEBCl4, and PEBBr4 had no melting peak. The area of the melting peak in DTA curves decreased in the order of PEB>PEBCl2>PEBBr2>PEBCl4. The ratios of melting points (K) of halogenated to non-halogenated polyether-esters were 0.95 -1.05. These values are larger than those obtained for halogenated polyesters. Weight loss at lower temperature increased and that at higher temperature decreased by halogen substitution. Ignition temperature and ignition lag increased by halogen substitution, and the polyether-esters had better flameretardancy than the polyesters. Solubility of polymers in organic solvents increased by halogen substitution, and halogenated polyether-esters had less solubility than halogenated polyesters.
