A composition and method where a polymer is exposed to radiation in the presence of a sensitizer such that at least a portion of the triplet oxygen (ground-state oxygen) in the composition to convert to singlet oxygen by Dexter energy transfer mechanism so that polymer photodegradation occurs by singlet oxygen (.sup.1O.sub.2) photosensitization with oxidation occurring at CH sites and the polymer undergoing a predetermined structural transformation to a biodegradable polymer.

A composition and method where a polymer is exposed to radiation in the presence of a sensitizer such that at least a portion of the triplet oxygen (ground-state oxygen) in the composition to convert to singlet oxygen by Dexter energy transfer mechanism so that polymer photodegradation occurs by singlet oxygen (.sup.1O.sub.2) photosensitization with oxidation occurring at CH sites and the polymer undergoing a predetermined structural transformation to a biodegradable polymer.

A water-soluble film, comprising a first water-soluble film, wherein the first water soluble film disintegrates in water within less than about 24 hours and dissolves in water within less than about 48 hours as measured by the MSTM-205 at 20 C. The disclosure provides a water-soluble film comprising a first water-soluble film that disintegrates in water within less than 24 hours and dissolves in water within less than 48 hours as measured by MSTM-205 at 20 C. The first water-soluble film optionally may be further characterized in that it does not disintegrate in water for at least about 1 hour and does not dissolve in water for at least about 1 hour as measured by MSTM-205 at 20 C. The disclosure further provides a water-soluble film comprising a first water-soluble film characterized in that the degradation and/or dissolution of the first water-soluble film is adapted to be activated by consumer handling.

A water-soluble film, comprising a first water-soluble film, wherein the first water soluble film disintegrates in water within less than about 24 hours and dissolves in water within less than about 48 hours as measured by the MSTM-205 at 20 C. The disclosure provides a water-soluble film comprising a first water-soluble film that disintegrates in water within less than 24 hours and dissolves in water within less than 48 hours as measured by MSTM-205 at 20 C. The first water-soluble film optionally may be further characterized in that it does not disintegrate in water for at least about 1 hour and does not dissolve in water for at least about 1 hour as measured by MSTM-205 at 20 C. The disclosure further provides a water-soluble film comprising a first water-soluble film characterized in that the degradation and/or dissolution of the first water-soluble film is adapted to be activated by consumer handling.

Process for producing a polypropylene comprising the steps of polymerizing the polypropylene in the presence of a metallocene catalyst, visbreaking said polypropylene and subsequently aerating the polypropylene at elevated temperature.

Process for producing a polypropylene comprising the steps of polymerizing the polypropylene in the presence of a metallocene catalyst, visbreaking said polypropylene and subsequently aerating the polypropylene at elevated temperature.

A method for depolymerizing a polyester may comprise heating a polyester at a temperature and for a period of time in the presence of a supported metal-dioxo catalyst, optionally, in the presence of H.sub.2, to induce hydrogenolysis of ester groups in the polyester and provide monomers of the polyester.

A method for depolymerizing a polyester may comprise heating a polyester at a temperature and for a period of time in the presence of a supported metal-dioxo catalyst, optionally, in the presence of H.sub.2, to induce hydrogenolysis of ester groups in the polyester and provide monomers of the polyester.