Abstract
A novel low-εr polycyanurate film, plasma-polymerized 4-cumylphenol cyanate ester (PPCPCE) film is prepared by plasma deposition of 4-cumylphenol cyanate ester (CPCE). Different from the conventional thermal polymerization of cyanate ester monomers, the plasma polymerization of CPCE proceeds mainly via the opening of π-bonds of the O–CN cyanate ester functional groups which are further formed into a large π-conjugated system[0]. Structural and morphology characterizations show that a smooth and homogenous PPCPCE film with a large π-conjugated system and a high retention of the aromatic ring structure can be obtained at a lower discharge power of 5 W, which gives a low-εr of 2.51. A higher discharge power brings about more severe molecular fragmentation and a significantly rougher film surface.
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