COMPOSITION FOR PREPARING TRANSPARENT POLYMER FILM, TRANSPARENT POLYMER FILM, AND ELECTRONIC DEVICE INCLUDING SAME
申请人:Samsung Electronics Co., Ltd.
公开号:EP3187528A1
公开(公告)日:2017-07-05
A composition for preparing a polyimide or poly(imide-amide) copolymer, including (1) at least one of (i) a polyimide, a polyamic acid, or a poly(imide-amic acid) including at least one selected from a structural unit represented by Chemical Formula 1 and a structural unit represented by Chemical Formula 2; and (ii) a poly(imide-amide) copolymer, a poly(amic acid-amide) copolymer, or a poly(imide and amic acid-amide) copolymer including at least one selected from a structural unit represented by Chemical Formula 1 and a structural unit represented by Chemical Formula 2, and a structural unit represented by Chemical Formula 3, and (2) a compound having a maximum absorption wavelength at about 570 nm or more in a visible radiation region:
wherein in Chemical Formulae 1 to 3, A, B, D, and E are the same as defined in the detailed description.
Poly(amide-imide) copolymer, method of manufacturing the same, poly(amide-imide) copolymer film, window for display device, and display device
申请人:SAMSUNG ELECTRONICS CO., LTD.
公开号:US10738164B2
公开(公告)日:2020-08-11
A poly(amide-imide) copolymer including an amide structural unit having an amide bond in a polymer main chain and an imide structural unit having an imide bond in a polymer main chain, wherein at least one imide structural unit includes a moiety cross-linked to an adjacent polymer main chain through an amide bond.
POLYMERS, POLYMER MEMBRANES AND METHODS OF PRODUCING THE SAME
申请人:Air Products and Chemicals, Inc.
公开号:EP2880080B1
公开(公告)日:2018-07-04
HOLLOW FIBER, DOPE COMPOSITION FOR FORMING HOLLOW FIBER, AND METHOD OF PREPARING HOLLOW FIBER USING THE SAME
申请人:JUNG Chul-Ho
公开号:US20090282982A1
公开(公告)日:2009-11-19
Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyamic acid, and the polyamic acid includes a repeating unit obtained from aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and dianhydride.