Accession Number : AD0430649

Title :   DEVELOPMENT OF TRANSPARENT PLASTIC MOISTURE BARRIERS BY RADIATION-INDUCED GRAFT POLYMERIZATION.

Descriptive Note : Final rept., 1 Sep 62-31 Aug 63,

Corporate Author : RADIATION APPLICATIONS INC LONG ISLAND CITY N Y

Report Date : 05 SEP 1963

Pagination or Media Count : 52

Abstract : Grafting of various monomers to polyethylene for the purpose of improving moisture barrier properties of the polymer has been studied. Monomers employed were, primarily, vinylidene chloride, chlorotrifluoroethylene and bromotrifluoroethylene. Some co-grafting with vinylidene chloride and other monomers was also performed. Grafting was primarily initiated by gamma irradiation; some studies with ultraviolet and chemical initiation were undertaken. The moisture barrier properties were improved by ca. 50% with a high vinylidene chloride graft, with a low vinylidene chloride graft prepared in the presence of chain regulator, and with a vinylidene chloride copolymer graft (all prepared by gamma irradiation). Grafting of chlorotrifluoroethylene could be performed, but the WVTR decreased with increased grafting levels. (Author)

Descriptors :   (*POLYETHYLENE PLASTICS, MOISTUREPROOFING), (*MOISTUREPROOFING, PACKING MATERIALS), (*POLYMERIZATION, RADIATION CHEMISTRY), CHLORINE COMPOUNDS, FLUORINE COMPOUNDS, BROMINE COMPOUNDS, GAMMA RAYS, ULTRAVIOLET RADIATION, CRYSTAL STRUCTURE, HALOGENATED HYDROCARBONS, HALOCARBON PLASTICS, PHOTOCHEMICAL REACTIONS, HALOGENATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE