Abstract: The present invention relates to an organic aerogel obtained by reacting an amine compound having at least two amine functionalities and a cyclic ether compound in the presence of a solvent. An organic aerogel according to the present invention is produced with a versatile process and provides good thermal and acoustic insulation and good mechanical properties.

Abstract: The present disclosure relates to a membrane for flue gas separation containing a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer prepared simply by heat-treating a membrane prepared from an o-hydroxypolyimide copolymer having carboxylic acid groups such that thermal crosslinking and thermal rearrangement occur simultaneously or a membrane for flue gas separation containing a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer having a benzoxazole group content of less than 80% in the polymer chain, prepared from transesterification crosslinking of an o-hydroxypolyimide copolymer having carboxylic acid groups and a diol-based compound followed by thermal rearrangement, and a method for preparing the same.

Abstract: The present disclosure relates to a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer membrane prepared simply by heat-treating a membrane prepared from an o-hydroxypolyimide copolymer having carboxylic acid groups such that thermal crosslinking and thermal rearrangement occur simultaneously or a gas separation membrane containing a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer having a benzoxazole group content of less than 80% in the polymer chain, prepared from transesterification crosslinking of an o-hydroxypolyimide copolymer having carboxylic acid groups and a diol-based compound followed by thermal rearrangement, and a method for preparing the same (a membrane for flue gas separation is excluded).

Abstract: The present disclosure relates to a membrane for flue gas separation containing a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer prepared simply by heat-treating a membrane prepared from an o-hydroxypolyimide copolymer having carboxylic acid groups such that thermal crosslinking and thermal rearrangement occur simultaneously or a membrane for flue gas separation containing a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer having a benzoxazole group content of less than 80% in the polymer chain, prepared from transesterification crosslinking of an o-hydroxypolyimide copolymer having carboxylic acid groups and a diol-based compound followed by thermal rearrangement, and a method for preparing the same.

Abstract: The present disclosure relates to a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer membrane prepared simply by heat-treating a membrane prepared from an o-hydroxypolyimide copolymer having carboxylic acid groups such that thermal crosslinking and thermal rearrangement occur simultaneously or a gas separation membrane containing a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer having a benzoxazole group content of less than 80% in the polymer chain, prepared from transesterification crosslinking of an o-hydroxypolyimide copolymer having carboxylic acid groups and a diol-based compound followed by thermal rearrangement, and a method for preparing the same (a membrane for flue gas separation is excluded).

Abstract: Provided is a crosslinked thermally rearranged poly(benzoxazole-co-imide) obtained through the transesterification crosslinking of an ortho-hydroxy polyimide copolymer and a diol compound, followed by thermal rearrangement, a gas separation membrane (excluding a membrane for flue gas separation), and a method for preparing the same. The crosslinked thermally rearranged poly(benzoxazole-co-imide) according to the present invention allows less packing of polymer chains and has a structure with a larger space, and thus shows increased possibility of permeation and diffusion of small molecules therethrough.

Abstract: Provided is a method for preparing a membrane for flue gas separation including a crosslinked thermally rearranged poly(benzoxazole-co-imide) through the transesterification crosslinking of an ortho-hydroxy polyimide copolymer and a diol compound, followed by thermal rearrangement. The membrane for flue gas separation including the crosslinked thermally rearranged poly(benzoxazole-co-imide) has excellent gas permeability and selectivity, and particularly provides gas separation quality corresponding to a level exceeding the so-called 2008 upper bound in terms of carbon dioxide/methane separation.

Abstract: Provided is a method for preparing a membrane for flue gas separation including a crosslinked thermally rearranged poly(benzoxazole-co-imide) through the transesterification crosslinking of an ortho-hydroxy polyimide copolymer and a diol compound, followed by thermal rearrangement. The membrane for flue gas separation including the crosslinked thermally rearranged poly(benzoxazole-co-imide) has excellent gas permeability and selectivity, and particularly provides gas separation quality corresponding to a level exceeding the so-called 2008 upper bound in terms of carbon dioxide/methane separation.