Chemical vapor deposition copolymerization of 4-carboxyl-[2,2] paracyclophane and 4-amino-[2,2] paracyclophane

Chemical vapor deposition copolymerization (CVDCP) of 4-carboxyl-[2,2] paracyclophane (4-carboxyl-PCP) and 4-amino-[2,2] paracyclophane (4-amino-PCP) is carried out. It is shown in FTIR and 13C NMR spectra of the copolymer that an amide or imide bond is formed during the pyrolysis and the transportation of the pyrolysis products. Partial crosslinking, caused by the amidation or imidation of –COOH and –NH2 among different chains in the copolymer, is possible during the transportation and deposition process. Compared with poly(carboxyl-p-xylylene-co-p-xylylene) (PPX-Carb), the thermal stability of the copolymer is improved. The crystallinity of the copolymer is reduced which is confirmed by transmittance and XRD results of the copolymer.