Abstract: A polylactide resin achieved by using a composition containing a polylactide resin, a phosphorus-based compound, an anhydride-based compound, and a compound of Chemical Formula 1: where R is as a branching agent resulting in a polylactide resin having a high degree of branching that has not been previously achieved, and the highly branched polylactide resin can be used in processes in which it was difficult to use conventional polylactide resins, such as expanded foam.

Abstract: A method for preparing a polylactic acid polymer excellent in color characteristics while having high molecular weight by using a combination of a tin-based catalyst and a phosphinite-based cocatalyst in a ring-opening polymerization reaction of a polylactic acid oligomer.

Abstract: A polylactide resin composition that includes a specific branching agent, a phosphorus compound, an organic acid anhydride, and a polylactide resin, resulting in a highly branched polylactide resin, which had not been previously achieved, is possible, exhibiting improved physical properties, especially melt strength, are improved compared to conventional polylactide resins, and it can be applied in processes that were difficult to apply conventional polylactide resins, such as expanded foam.

Abstract: The present disclosure provides a polyalkylene carbonate-based resin having excellent thermal stability, thereby having an improved heat shrinkage phenomenon, and a molded article produced using the same. The polyalkylene carbonate-based resin includes 100 parts by weight of a base resin including a polyalkylene carbonate resin and a polylactide resin, and 5 parts by weight to 10 parts by weight of a heat shrinkage prevention agent, wherein the base resin includes the polyalkylene carbonate resin and the polylactide resin in a weight ratio of 6:4 to 4:6, and the heat shrinkage prevention agent is one or more selected from the group consisting of a polyalkyl(meth)acrylate-based resin, a polyalphaolefin-vinyl acetate-based resin, and a polyoxyalkylene-based resin.

Abstract: The present disclosure relates to a method for separating an organozinc catalyst from a polyalkylene carbonate polymerization solution, and the method of the present disclosure includes: stirring and aging a polymerization solution including a polyalkylene carbonate resin, an organozinc catalyst, an alkylene oxide and a polymerization solvent; and filtering the polymerization solution after completing the aging.

Abstract: Provided is a method for preparing a polylactic acid polymer that has a desired high molecular weight by performing a ring-opening polymerization reaction of lactide in the presence of a SnHPO3 catalyst to prepare the polylactic acid polymer. The method exhibits excellent activity without decomposing the SnHPO3 catalyst even when the polymerization reaction proceeds at high temperature.

Abstract: The present disclosure provides a polyalkylene carbonate-based resin having excellent thermal stability, thereby having an improved heat shrinkage phenomenon, and a molded article produced using the same. The polyalkylene carbonate-based resin includes 100 parts by weight of a base resin including a polyalkylene carbonate resin and a polylactide resin, and 5 parts by weight to 10 parts by weight of a heat shrinkage prevention agent, wherein the base resin includes the polyalkylene carbonate resin and the polylactide resin in a weight ratio of 6:4 to 4:6, and the heat shrinkage prevention agent is one or more selected from the group consisting of a polyalkyl(meth)acrylate-based resin, a polyalphaolefin-vinyl acetate-based resin, and a polyoxyalkylene-based resin.

Abstract: The present invention relates to a method for separating an organozinc catalyst from a polyalkylene carbonate polymerization solution, and the method of the present invention includes: stirring and aging a polymerization solution including a polyalkylene carbonate resin, an organozinc catalyst, an alkylene oxide and a polymerization solvent; and filtering the polymerization solution after completing the aging.

Abstract: An image interpolation apparatus includes a half pel interpolation unit that is configured to perform half pel interpolation on input data to provide half pel interpolation results. A data selection unit is configured to select a portion of the half pel interpolation results to provide a selected portion of the half pel interpolation results. A quarter pel interpolation unit is configured to perform a quarter pel interpolation on the selected portion of the half pel interpolation results, in response to a motion vector. The half pel interpolation unit can operate independent of the motion vector. The quarter pel interpolation unit can generate a data selection signal in response to the motion vector, and the data selection unit can be responsive to the data selection signal. Related methods also are disclosed.

Abstract: A sound processing apparatus includes a sound processor to process sound, a plurality of image generators to photograph an object and generate an image, respectively, and a controller to recognize a position of the object with the plurality of images generated by the plurality of image generators, and control the sound processor to adjust a property of the sound corresponding to the position of the object.

Abstract: An image interpolation apparatus includes a half pel interpolation unit that is configured to perform half pel interpolation on input data to provide half pel interpolation results. A data selection unit is configured to select a portion of the half pel interpolation results to provide a selected portion of the half pel interpolation results. A quarter pel interpolation unit is configured to perform a quarter pel interpolation on the selected portion of the half pel interpolation results, in response to a motion vector. The half pel interpolation unit can operate independent of the motion vector. The quarter pel interpolation unit can generate a data selection signal in response to the motion vector, and the data selection unit can be responsive to the data selection signal. Related methods also are disclosed.