Abstract
Copper/low density polyethylene (LDPE) composites covered with LDPE film on the surface were prepared for intrauterine contraceptive device (IUD). Cu 2+ release rates of the composites were determined by absorbance measurements. The surface characteristics of the composites after incubated for 5 months were investigated by SEM and EDX techniques. The results show that the existence of LDPE film on the surface of the composites decreases the release rate of Cu 2+, especially the burst release of Cu 2+ at initial period. The undesirable deposits, which are observed on the surface of the composite without LDPE film, are not detected on the surface of the composite with LDPE film, indicating that the presence of LDPE film can effectively prevent the formation of deposits on the composite surface. Results obtained from this study suggest that the existence of LDPE film on the composite surface may alleviate the side effects (bleeding, abdominal pain and inflammatory complication) of IUD resulting from the burst release and the deposit formation.
Published Version
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