侧链含萘可交联聚芳醚酮的合成及性能

Synthesis and Properties of a Novel Crosslinkable Poly(aryl ether ketone) Containing Naphthalene Group on a Side Chain

以4,4'-二羟基苯基正戊酸和4,4'-二氟二苯酮为原料,二甲基亚砜(DMSO)为溶剂,采用亲核取代反应合成侧基含羧基的聚芳醚酮均聚物,进一步与1-萘酚和2-萘酚接枝制备新型含萘可交联聚芳醚酮.用核磁共振(NMR)、红外光谱(FTIR)、示差扫描量热(DSC)和热重分析(TGA)表征其结构和性能,含萘聚芳醚酮在常用有机溶剂如N,N-二甲基乙酰胺(DMAc)、DMSO,四氢呋喃(THF)中有良好的溶解性,并具有很好的成膜性.DSC测试结果显示,在170℃热处理2 h的交联聚合物的玻璃化转变温度(Tg)提高40℃.TGA数据显示接枝后的聚合物的5%热失重温度提高40～50℃,证明其发生交联反应.结果表明,新型含萘可交联聚芳醚酮具有热固性树脂的耐溶剂和耐高温特性,进一步拓宽了聚芳醚酮的应用前景.

A novel crosslinkable poly（arylene ether ketone）s （PAEK） with naphthalene pendant was prepared from carboxyl-containing PAEK precursor and naphthalenol by graft reaction. The structures of the polymer before and after grafted were confirmed by FTIR and 1H NMR spectroscopy. These polymers exhibited good solubility in common organic solvents, such as dimethyl sulfoxide（DMSO）, N,N-dimethylacetamide （DMAc）, tetrahydrofuran （THF） and chloroform, and could be casted into flexible and transparent films. However, after thermally cross-linked at 170℃ for 2 h at air atmosphere, the resulting cross-linked polymer exhibited good chemical resistance, insoluble in above organic solvents. In addition, the cross-linked polymers displayed high thermal stability. The glass transition temperature（Tg） and thermal weight loss temperature were obviously increased respectively.