Abstract:
PURPOSE: A poly(amide-imide) block copolymer is provided to be able to improve the optical properties of a molded article including the transparency, heat resistance, mechanical strength and flexibility by including a first segment with an excellent solvent solubility, workability and optical characteristic, and a second segment with an excellent heat resistance and mechanical strength. CONSTITUTION: A poly (amide-imide) block copolymer comprises a first segment including a repeating unit represented by Chemical formula 1; and a second segment including a repeating unit represented by Chemical formula 2. The first segment includes 1-1000 repeating units which are identical or different and represented by Chemical formula 1, independently. The second segment includes 1-1000 repeating units which are identical or different and represented by Chemical formula 2, independently. The first and second segments have the weight average molecular weight of 500-50,000 g/mol.
Abstract:
분자 내에 아라미드 구조를 포함하는 디아민, 및 상기 디아민과 디언하이드라이드를 반응시켜 제조되는 폴리(이미드-아미드) 코폴리머, 상기 폴리(이미드-아미드) 코폴리머의 제조 방법, 및 상기 제조된 폴리(이미드-아미드) 코폴리머를 포함하는 성형품이 제공된다.
Abstract:
Provided are a poly(amide-imide) copolymer composition, a poly(amide-imide) copolymer produced from the same, and a molded product including the copolymer, wherein the poly(amide-imide) copolymer composition includes an oligomer having at least one amine terminal and an oligomer having at least one anhydride terminal, and at least a partial amine terminal of the oligomer having at least one amine terminal includes an oligomer substituted by diamine having a pKa value of 3 or less at 25°C.
Abstract:
The present invention provides a complex composition of a polyimide copolymer and inorganic particles, which comprises the following: the copolymer which includes a first recurring unit or a second recurring unit including an imide recurring unit or an amide acid recurring unit forming the imide recurring unit by imidization, and a third recurring unit including an amide recurring unit, in which at least one end of the copolymer is substituted by a substituted or non-substituted siloxane or silanol group; and the inorganic particles or precursors thereof.
Abstract:
The present invention provides the following: a material for an optical film containing a compound denoted by chemical formula 1; a polymer containing a reoccurring unit denoted by chemical formula 10; a polymer containing a reoccurring unit denoted by chemical formula 20 or chemical formula 21; an article prepared by using the polymers; and a display device including the article.
Abstract:
PURPOSE: A polyamide mixture is provided to have excellent transparency, thermal resistance, and mechanical strength by comprising a first polyamide with a relatively rigid structure, and a second polyamide with a relatively flexible structure. CONSTITUTION: A polyamide mixture comprises a first polyamide comprising a repeating unit in chemical formula 1, and a repeating unit in chemical formula 2, or a combination thereof, and a second polyamide comprising a repeating unit in chemical formula 3. The first polyamide has a weight average molecular weight(Mw) of 20,000-400,00 g/mol. The second polyamide has a weight average molecular weight of 20,000-400,000 g/mol. The weight ratio of the first polyamide and the second polyamide is 1:99-60:40.