Abstract: A ternary composite catalyst of diethylzinc and yttrium trifluoroacetate loaded on chitin for copolymerization of carbon dioxide, epoxy cyclohexane and ethylene oxide is provided. The ternary composite catalyst exhibits strong catalytic activity for the ternary copolymerization of carbon dioxide, cyclohexane oxide and ethylene oxide. A high molecular weight and content of ester chain is maintained. Conventional rare earth ternary catalysts leave residues in the polymer, and the polymer requires rinsing with hydrochloric acid. The ternary composite catalyst can be removed through filtration. The average molecular weight of the resulting polycarbonate is more than 100,000, and the ester chain content is more than 90%. The resulting polymer has a lower metal content. The ternary composite catalyst can be used in agricultural film, disposable packaging and other polymer materials.

Abstract: A cable termination includes a tubular body having an outer surface and a through aperture, and at least one shed extending from the outer surface. The shed includes an outer edge. A first support is coupled to the shed, extends between the outer surface of the tubular body and the outer edge of the shed, and is configured to increase the rigidity of the shed.

Abstract: A cable termination includes a tubular body having an outer surface and a through aperture, and at least one shed extending from the outer surface. The shed includes an outer edge. A first support is coupled to the shed, extends between the outer surface of the tubular body and the outer edge of the shed, and is configured to increase the rigidity of the shed.