There are disclosed a novel copolymer comprising having recurring unit represented by the formula:
wherein
Y represents a phenylene group or a naphthylene group, with a recurring number of k and a recurring unit represented by the formula:
wherein
Ar represents a divalent aryl group, with a recurring number of f, a value of k/(k + ℓ) is 0.5 to 0.97 and having a reduced viscosity [ηsp/c] of 0.3 dℓ/g or higher as measured in p-chlorophenol solution at a concentration of 0.2 g/de at 60 °C, and a process for producing the novel copolymer comprising the steps of:
(A) reacting dihalogenobenzonitrile represented by the following formula:
wherein
X represents a halogen atom, an alkali metal salt of hydroquinone or dihydroxynaphthalene represented by the following formula:
wherein
Y represents a phenylene group or a naphthylene group and M represents an alkali metal, and an alkali metal salt of a divalent phenol represented by the formula:
wherein in
Ar represents a divalent aryl group and M represents an alkali metal,
in the presence of a solvent, and
(B) treating the obtained reaction product with water or an alcohol.
本发明公开了一种新型共聚物,该共聚物具有由式......表示的递归单元:
其中
Y代表重复数为k的亚苯基或亚
萘基,以及由式表示的重复单元:
其中
Ar代表二价芳基,循环数为f,k/(k+ℓ)的值为0.5至0.97,在
对氯苯酚溶液中以0.2g/de的浓度在60℃下测量,其降低粘度[ηsp/c]为0.3dℓ/g或更高,生产该新型共聚物的工艺包括以下步骤:
(A) 使下式所代表的二卤代苯腈反应:
其中
X 代表卤素原子、
对苯二酚的碱
金属盐或下式所代表的二羟基
萘:
其中
Y 代表亚苯基或亚
萘基,M 代表碱
金属;以及下式所代表的二价
酚的碱
金属盐: 其中
其中
Ar 代表二价芳基,M 代表碱
金属、
在有溶剂存在的情况下,以及
(B) 用
水或醇处理得到的反应产物。