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  ____       ___    __    __     ___     _____    
 |  _ \\    / _ \\  \ \\ / //   / _ \\  |  __ \\  
 | |_| ||  / //\ \\  \ \/ //   / //\ \\ | |  \ || 
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 |_|\_\\  |_||  |_||   \//    |_||  |_|||_____//  
 `-` --`  `-`   `-`     `     `-`   `-`  -----`

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Text this: Low relative dielectric permittivities of polyimides and copolyimides derived from non-coplanar diamines and 4,4′-(hexafluoroisopropyl)diphthalic anhydride