High performance polyimides with good solubility and optical transparency formed by the introduction of alkyl and naphthalene groups into diamine monomers
作者:Tianyun Li、Huahua Huang、Lei Wang、Yongming Chen
DOI:10.1039/c7ra07142f
日期:——
chemical imidization under microwave irradiation, to obtain nine types of polyimide (PI). It was found that the introduction of alkyl side groups can improve the solubility and optical transparency of PIs. Moreover, compared with BAN-2 based PIs containing –CH3 groups, BAN-3 based PIs containing –CH(CH3)2 groups exhibited better solubility and optical transparency (transmittances at 450 nm of over 86%). Meanwhile
在苯胺环的邻位带有–H,–CH 3或–CH(CH 3)2取代基的三种含萘二胺,包括4,4'-(萘-1-基亚甲基)二苯胺(BAN-1 ),4,4'-(萘-1-基亚甲基)双(2,6-二甲基苯胺)(BAN-2)和4,4'-(萘-1-基亚甲基)双(2,6-二异丙基苯胺)(BAN -3)是通过简单的一步亲电取代反应合成的。然后将这些二胺与三种市售二酐通过在微波辐射下化学酰亚胺化,得到九种类型的聚酰亚胺(PI)。发现引入烷基侧基可以改善PI的溶解性和光学透明性。此外,与含–CH 3基团的BAN-2基PI相比,含–CH(CH 3)2基团的BAN-3基PI具有更好的溶解性和光学透明性(在450 nm处的透射率超过86%)。同时,由于存在刚性的萘侧基,所有的PI均具有高的热稳定性,在氮气下玻璃化转变温度(T g)超过290°C,5%的分解温度失重超过510°C 。此外,T g发现由BAN-2和3,3',4,