Abstract: A biopolymer composition, a preparation method for the same, and a bioplastic using the same, the biopolymer composition comprising at least 83.5 weight % of a copolymer resin of lactic acid (LA) and 3-hydroxypropionate (3HP), an antioxidant, and a lubricant, and the composition having an elongation percentage of at least 90% but not greater than 500%.

Abstract: A motion assistance apparatus includes a force transmitting frame configured to support a distal part of a user, a slider configured to slide in the force transmitting frame, and a driving frame connected to the slider and configured to slide with respect to a proximal part of the user.

Abstract: A poly(lactic acid-b-3-hydroxypropionic acid) block copolymer characterized in that mechanical properties of the block copolymer are excellent by introducing a lactide optical isomer-derived repeating unit and a poly(3-hydroxypropionic acid) repeating unit at the same time, and thus its application fields can be expanded.

Abstract: The present specification relates to a resin including a poly (lactic acid-b-3-hydroxypropionic acid) block co-polymer, a resin composition including the same, and a resin molded article.

Abstract: Provided is a biopolymer composition, a preparation method for the same, and a bioplastic using the same, the biopolymer composition comprising at least 83.5 weight % of a copolymer resin of lactic acid (LA) and 3-hydroxypropionate (3HP), an antioxidant, and a lubricant, and the composition having an elongation percentage of at least 90% but not greater than 500%.

Abstract: A motion assistance apparatus includes a force transmitting frame configured to support a distal part of a user, a slider configured to slide in the force transmitting frame, and a driving frame connected to the slider and configured to slide with respect to a proximal part of the user.

Abstract: Provided is a novel branched poly(lactic acid-3-hydroxypropionic acid) copolymer of Chemical Formula 1: wherein: R is a trivalent or higher functional group derived from a polyfunctional monomer, A is a direct bond, or a linking group derived from ether, sulfide, ester, thioester, ketone, sulfoxide, sulfone, sulfonate ester, amine, amide, imine, imide, or urethane, and B is a substituent of Chemical Formula 1-1 or Chemical Formula 1-2, where * is a moiety connected to A, k is an integer of 3 or more, n is an integer of 1 to 700, and m is an integer of 10 to 5,000. The copolymer can realize an excellent production yield while maintaining the intrinsic physical properties of poly(3-hydroxypropionic acid). Also provided is a method for preparing the copolymer.

Abstract: A novel branched poly(3-hydroxypropionic acid)polymer of Chemical Formula 1: R-[A-(B)n]k??[Chemical Formula 1] wherein: R is a trivalent or higher functional group derived from a polyfunctional monomer: A is a direct bond, or a linking group derived from ether, sulfide, ester, thioester, ketone, sulfoxide, sulfone, sulfonate ester, amine, amide, imine, imide, or urethane; B is a substituent of Chemical Formula 1-1 or Chemical Formula 1-2: * is a moiety connected to A; k is an integer of 3 or more: and n is an integer of 1 to 700, and a method for preparation thereof, which makes it possible to effectively prepare a polymer that achieves an excellent production yield while maintaining the intrinsic physical properties of poly(3-hydroxypropionic acid).

Abstract: Provided is a novel branched poly(3-hydroxypropionic acid)polymer.

Abstract: Provided is a novel a copolymer with structures including a branched poly(3-hydroxypropionic acid) and a poly(lactic acid).

Abstract: Provided is a block copolymer of Formula 1: wherein in Formula 1: R1 and R2 are each independently hydrogen, N, O, S, or substituted or unsubstituted C1-20 alkyl: X1 and X2 are each independently a direct bond, —COO—, —NR?CO—, —(NR?)(COO)—, —R?NCONR?—, or —OCOO—, wherein the R's are each independently hydrogen or C1-20 alkyl; L is a direct bond, substituted or unsubstituted C1-10 alkylene, substituted or unsubstituted C6-60 arylene, or substituted or unsubstituted C2-60 heteroarylene containing one or more heteroatoms selected from the group consisting of N, O, and S; and n and m are each independently an integer of 1 to 10,000. The block copolymer has excellent mechanical properties along with environmental friendliness and biodegradability.

Abstract: The present invention relates to a novel 3-hydroxypropionate-lactate block copolymer [P(3HP-b-LA)], and a method for preparing same, and more specifically, provides a method for preparing a 3-hydroxypropionate-lactate block copolymer, and a 3-hydroxypropionate-lactate block copolymer produced thereby, the method comprising: a first culture step in which, by using recombinant E. coli improved so as to be incapable of biosynthesizing lactic acid, P(3HP) is biosynthesized at the early stage of culturing by having glycerol as a carbon source and through 3-hydroxypropionate-generating genes and an enhanced PHA synthase; and a second culture step in which P(3HP) production is inhibited by using a carbon catabolic repression system for selectively introducing only glucose into E.

Abstract: Provided is a method for preparing a block copolymer, the method comprising subjecting a lactide monomer to a ring-opening polymerization in the presence of a poly(3-hydroxypropionate) initiator to prepare a polylactide-poly(3-hydroxypropionate)block copolymer.

Abstract: Provided is a triblock copolymer comprising a poly(3-hydroxypropionate) block, and polylactide blocks bonded to both ends of the poly(3-hydroxypropionate) block. Also provided is a method for preparing a triblock copolymer by ring-opening polymerization of lactide monomers in the presence of a poly(3-hydroxypropionate) initiator having hydroxy groups at both ends.

Abstract: Provided is a lactic acid-based block copolymer which is biodegradable while having excellent mechanical properties.

Abstract: Provided is a poly(lactic acid-b-3-hydroxypropionic acid) block copolymer, in which various physical properties of polylactic acid, such as tensile strength, etc., are improved by introducing a 3-hydroxypropionic acid-derived monomer into polylactic acid, and thus the application fields in which the polylactic acid can be used is expanded.

Abstract: Provided is a poly(lactic acid-b-3-hydroxypropionic acid) block copolymer in which transparency is improved by introducing a 3-hydroxypropionic acid-derived monomer into a polylactic acid, and thus its application field can be expanded.

Abstract: Provided is a copolymer comprising an irregularly arranged structure of a repeating unit of the following Chemical Formula 1 and a repeating unit of the following Chemical Formula 2, and a repeating unit of the following Chemical Formula 3 present at least at one end of the structure: and is characterized by having an improved elongation and also having a high weight average molecular weight while maintaining intrinsic properties of a polylactic acid. Also provided are methods of preparing the copolymer.

Abstract: Provided are a polylactate stereocomplex exhibiting excellent heat resistance and remarkably improved elongation characteristics while maintaining biodegradability, and a preparation method thereof.

Abstract: Provided is a biopolymer composition, a preparation method for the same, and a bioplastic using the same, the biopolymer composition comprising at least 83.5 weight% of a copolymer resin of lactic acid (LA) and 3- hydroxypropionate (3HP), an antioxidant, and a lubricant, and the composition having an elongation percentage of at least 90% but not greater than 500%.