Chemical Vapor Deposition Polymerization and Characterization of Poly (chloro-p-xylylene-co-p-xylylene)

Poly(chloro-p-xylylene)(PPX-C) was prepared by chemical vapor deposition(CVD) polymerization.Its chemical structure was confirmed by FTIR.It is found that PPX-C membrane has the same good solvent resistance and high chemical oxidation stability as poly(p-xylylene)(PPX),the initial degradation temperature and T_g of PPX-C membranes are reduced with the introduction of chloride as side groups.With the introduction of chloride,the polymer becomes amorphous and soft,and the dynamic(mechanical) damping properties of PPX-C are improved.It seems that the hydrophilicity of PPX-C membrane is similar to that of PPX,while the vapor permeability of PPX-C membranes is reduced compared with PPX.Thus the moisture-proof ability of PPX-C membrane is improved significantly.