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Thermal decomposition of labile poly(acrylic acid) (PAAc) side chains grafted onto fluorinated polyimide backbones (see Figure) is used to prepare nanoporous ultra‐low‐κ fluorinated polyimide films. The dielectric constant of the nanoporous fluorinated polyimide film can be varied by altering the graft concentration of the labile side chains.
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Wang et al. (2003) studied this question.
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