摘要:
This disclosure relates to polyalkylene carbonate resin that inhibits decomposition of resin resulting from back-biting and the like when heat treated, and thus exhibits improved thermal stability, and a method for preparing the same. The polyalkylene carbonate resin may comprise a basic polyalkylene carbonate based repeat unit, a polyalkyleneglycol based repeat unit, and the polyalkylene carbonate repeat unit crosslinked by a specific compound.
摘要:
The present disclosure relates to an economical method of preparing a resin composition including a polyalkylene carbonate with improved thermal stability and processability. More specifically, the method of preparing a resin composition includes the steps of polymerizing carbon dioxide and an epoxide compound in the presence of a zinc-based catalyst and a solvent, recovering monomers, removing the catalyst and recovering raw materials, solution-blending with a thermostable resin to improve the thermal stability and processability, and removing the solvent and byproducts from the reaction mixture by using an agitated flash drum and an extrusion or kneader-type devolatilizer.
摘要:
This disclosure relates to a method for preparing polyalkylenecarbonate. More specifically, in the method for preparing polyalkylenecarbonate, by using a solution polymerization with a specific heterogeneous catalyst and a solvent in the polymerization process of an epoxide compound and carbon dioxide, the products of side-reaction are reduced, removal of metal residues and by-products from the products is facilitated, danger due to overheating of the reactants is minimized, and heat removal and process stability are improved, and thus, high molecular weight copolymer may be easily provided, and mass production and scale-up are easy.
摘要:
The present invention relates to a method of manufacturing polyalkylene carbonate. More specifically, the method of manufacturing polyalkylene carbonate includes solution-polymerizing an epoxide compound and carbon dioxide in the presence of a cobalt complex having a neutral singe-site as a catalyst and a solvent, thereby providing stability and adjusting degree of polymerization and being advantageous for performing a post-treatment process after polymerization.
摘要:
The present invention provides a thermoplastic resin composition which includes: a first copolymer including a core including a conjugated diene-based polymer and a shell including an aromatic vinyl-based monomer unit and a vinyl cyan-based monomer unit; and a second copolymer including an aromatic vinyl-based monomer unit and a vinyl cyan-based monomer unit, wherein the first copolymer has a degree of grafting of 32 to 50%, the second copolymer has a weight-average molecular weight of 85,000 to 115,000 g/mol, and the thermoplastic resin composition includes the first copolymer at 30 wt% or less and an oligomer residue at 1.1 wt% or less. Specifically, the thermoplastic resin composition can shorten an injection molding time.
摘要:
This disclosure relates to a method for preparing polyalkylenecarbonate. More specifically, in the method for preparing polyalkylenecarbonate, by using a solution polymerization with a specific heterogeneous catalyst and a solvent in the polymerization process of an epoxide compound and carbon dioxide, the products of side-reaction are reduced, removal of metal residues and by-products from the products is facilitated, danger due to overheating of the reactants is minimized, and heat removal and process stability are improved, and thus, high molecular weight copolymer may be easily provided, and mass production and scale-up are easy.