Abstract:
PURPOSE: Provided are nano-sized metals or metal salts thereof stabilized by semi-telechelic or telechelic polymers obtained by living anionic polymerization, which has excellent stability in air and forms a nano-structure by simply mixing with a block copolymer. CONSTITUTION: The nano-sized metal particles or metal salts thereof present in a polymer matrix having a functional group at the end of the polymer chain and a molecular weight of 1000-10000, is stable in air, and is represented by the formula selected from the group consisting of the following formulae 1-5, wherein each of R1 and R2 is H, methyl or t-butyl; each of X1 and X2 is independently a carboxyl, hydroxyl, sulfonate, anhydride or thiol group; n is an integer of 10-5000; each of R3 and R4 is H or methyl; each of X2 and X3 is independently a hydroxyl, carboxyl, sulfonate, thiol, amine, tertiary amine or anhydride group; m is an integer of 20-10000; X4 is a hydroxyl, amine or tertiary amine group; Y2 is a hydroxyl, carboxyl, sulfonate, thiol, amine, tertiary amine or anhydride group; A1 is a styrene monomer; B1 is a methyl methacrylate, vinylpyridine or diene monomer; and each of o and p is an integer of 10-5000.
Abstract:
PURPOSE: A method for preparing a polystyrene grafted copolymer having a functional group is provided, to allow various functional groups to be introduced into the side chain of a syndiotactic polystyrene, thereby preparing the polymer with improved strength and processability. CONSTITUTION: The method comprises the steps of: protecting a functional group of a benzophenol derivative with a silane protecting group and methylating it to obtain a diphenylethylene derivative; reacting the diphenylethylene derivative with an alkyl alkali metal initiator quantitatively, and polymerizing the obtained one with styrene and/or a diene-based monomer in a non-polar solvent or a non-polar/polar solvent mixture, to obtain a styrene and/or diene living polymer having a functional group; reacting the living polymer with 4-chloromethylstyrene to obtain a styrene and/or diene-chained a styrene macromonomer having a functional group; and copolymerizing the macromonomer and styrene monomer by using a titanocene catalyst system, to obtain a polystyrene grafted copolymer. The macromonomer is represented by the formula 5 or 6. In the formula 5, R is a normal butyl group or a secondary butyl group; R1 is H, -CH3, -OCH3, -N(CH3)2, -OSi(t-C4H9)(CH3)2, -N(Si(CH3)3)2 or -C(CH3); X1 and X2 are independent each other, are H, -OCH3, -N(CH3)2, -OSi(t-C4H9)(CH3)2 or -N(Si(CH3)3)2, and are not H simultaneously; and n is a degree of polymerization and is an integer of 5-100. In the formula 6, R is a normal butyl group or a secondary butyl group; R1 is H or -CH3; X1 and X2 are independent each other, are H, -OCH3, -N(CH3)2, -OSi(t-C4H9)(CH3)2 or -N(Si(CH3)3)2, and are not H simultaneously; and m and n are a degree of polymerization and are an integer of 5-100.
Abstract:
본 발명은, (a) p K a 값이 상이한 술폰아미드 스티렌계 또는 술폰아미드 아크릴계 단량체를 제공하고, (b) 열 응답성 폴리이소프로필아크릴아미드 또는 폴리메틸렌비스아크릴아미드를 제공하고, (c) 상기 (a) 단계는 합성된 단량체를 극성 또는 비극성 용매 중에서 조절/리빙 중합에 따라 폴리이소프로필아크릴아미드 또는 폴리메틸렌비스아크릴아미드와 공중합시킴으로써, 분자량이 조절되고 열 및 pH에 대한 이중 자극 응답성 (Dual Stimuli-Responsive)을 갖는 하이드로젤의 랜덤 및 블록 공중합체를 제조하는 방법에 관한 것이다.
Abstract:
본 발명에 따라, 사슬 말단에 관능기를 갖는 폴리스티렌 및(또는) 폴리디엔 구조를 갖는 스티렌계 마크로모노머를 합성하고, 이를 다시, 티타노센 촉매 시스템을 이용하여 스티렌계 단량체와 공중합함으로써 관능기를 갖는 결정성 신디오탁틱 폴리스티렌-그래프트-무정형 폴리스티렌, 또는 결정성 신디오탁틱 폴리스티렌-그래프트-무정형 폴리디엔 공중합체를 제조하는 방법이 개시된다. 또한, 본 발명에 따라 다양한 관능기를 신디오탁틱 폴리스티렌 곁 사슬에 도입할 수 있기 때문에 다양한 고분자 물질과의 블렌딩을 통하여 강인성 또는 가공성이 뛰어난 고분자 물질을 제조할 수 있는 공중합체 물질이 수득된다.
Abstract:
PURPOSE: A method for preparing a styrene derivative having a various functional group, a syndiotactic polystyrene and styrene/olefin copolymer using thereof which are able to enlarge the application fields as new high molecular materials and a method for preparing thereof are provided. CONSTITUTION: A styrene derivative having the protected functional group of the following formula 4, where X is either -O-SiR2R3R4R5 or -NR6R7, where all R2, R3 and R4 are CH3; or R2 and R3 are CH3 and R4 is tertiary butyl group; and each R6 and R7 is one selected from the group consisting of CH3, -Si(CH3)3 and -Si(CH3)2(tertiary-butyl), is prepared by: (i) protecting hydroxyl group or amine group of benzene aldehyde of the following formula 3, where X is either OH or NH2, with silane; and (ii) methylenating the aldehyde group by using 'Tebbe' material. The syndiotactic polystyrene and styrene/olefin copolymer are prepared by polymerizing more than one styrene derivative having the protected functional group of the formula 4, where X, R2, R3, R4, R6 and R7 are same as defined above, or copolymerizing the styrene derivative either with more than one styrene monomer of the following formula 5, where R1 is either H or CH3 and R2 is one selected from the group consisting of H, CH3, tertiary butyl, Cl and CH2Cl, or with more than one olefin monomer of the following formula 6, where all R1 and R2 are H; or R1 is H and R2 is CH3.
Abstract:
PURPOSE: Provided is a method for producing dual stimuli-responsive hydrogel copolymer, which is possible to control the molecular weight of thermoresponsive and pH-responsive hydrogel copolymer, provide resulting polymers with high polymerization yield comparing to the conventional radical polymerization, control the molecular weight and properties of the dual stimuli-responsive hydrogel copolymer, and easily remove residual catalysts after the polymerization due to selective use of polar or non-polar solvent. CONSTITUTION: The method for dual stimuli-responsive hydrogel copolymer responding to heat and pH, comprises the steps of: (a) providing a sulfonamide styrene monomer or sulfonamide acrylic monomer which has different pKa value; (b) providing a thermoresponsive polyisopropyl acrylamide or polymethylene bisacrylamide; (c) copolymerizing the monomer synthesized in the step (a) with polyisopropyl acrylamide or polymethylene bisacrylamide in a polar or non-polar solvent, wherein the steps (b) and (c) are conducted by controlled/living polymerization using a phosphine type catalyst or an amine type catalyst having amine ligand, and alkyl halide initiator. The random- or block hydrogel copolymer produced by the method is represented by the formula 1, 2,and 3, wherein R1 is selected from a group consisting of phenyl, isoxazole, acetyl, methizole, dimethoxine, diazine, methoxypyridazine, methazine, and pyridine, R2 is hydrogen or methyl, m is an integer of 5 to 500, n is an integer of 3 to 500, and y/x ratio is 2/98 to 8/92.
Abstract:
PURPOSE: Provided is a new polymer emitting blue light as light-emitting display device, which is fluorenene based derivative by performing a methylene of fluorenone based derivative having steric hindrance. CONSTITUTION: A preparation method of co-polymer emitting blue light comprises the following steps: (i) performing methylenation of 9-fluorenone of formula 1 and derivative thereof by using Tebbe to 9-fluorenene of formula 2 and derivative thereof; (ii) obtaining a living co-polymer whose mole number and molecular weight of fluorene based unit are controlled by co-polymerizing the 9-fluorenene and derivative thereof with vinyl based monomer through using alkyl lithium and alkali metal naphthalenide initiator in the presence of polar or non-polar solvent; (iii) obtaining a block co-polymer by co-polymerizing the living co-polymer obtained in step (ii) with monomer for manufacturing polymer electrolyte, R2 is H, F, Cl, N(CH3)2, OSi(CH3)2(t-Bu), R3 is H or Cl, R2 and R3 are not always same, R4 and R5 are H, F, N(CH3)2, OH or NH2 independently.
Abstract:
Disclosed are nano-sized metals and metal salts stabilized by using semi-telechelic and telechelic polymers prepared through living anionic polymerization, and their synthetic methods, and a nanostructure wherein the nano-sized particles are self-assembled by mixing block copolymers and film-casting. The present invention provides a new method for preparing nano-sized particles capable of easily accomplishing nano-structure by merely mixing, especially with block copolymers, and having excellent stability.
Abstract:
본 발명은 관능기를 갖는 스티렌계 유도체의 제조방법, 이를 이용한 기능성기를 갖는 신디오탁틱 폴리스티렌과 스티렌/올레핀 공중합체, 및 그의 제조방법에 관한 것이다. 본 발명의 관능기를 갖는 스티렌계 유도체의 제조방법은, 관능기를 갖는 벤젠알데히드 물질을 실란으로 보호화시킨 다음, 'Tebbe' 물질을 이용하여 메틸렌화시키는 것을 특징으로 하는 것이고, 본 발명의 기능성 신디오탁틱 폴리스티렌 및 스티렌/에틸렌 공중합체의 제조방법은 본 발명의 방법에 따라 제조된 1종 이상의 관능기를 갖는 스티렌 유도체를 단독으로 또는 스티렌계 및 올레핀계 중의 1종 이상의 단량체와 함께 메탈로센계 촉매를 이용하여 중합하는 것을 특징으로 하며, 이러한 중합방법에 의해 제조될 수 있는 본 발명의 신디오탁틱 폴리스티렌 및 스티렌/에틸렌 공중합체는 중합체 중에 여러 가지 기능성기를 갖고 있다. 본 발명에 따르면, 다양한 형태의 관능기를 갖는 스티렌계 유도체가 용이하게 제조될 수 있으며, 이 스티렌계 유도체를 사용하여 중합한 신디오탁틱 폴리스티렌 및 스티렌/에틸렌 공중합체는 기능성기가 다양하게 도입됨으로써 새로운 고분자 재료로서의 응용범위가 확대되고 다양한 용도 개발이 가능하게 되며, 특히 기존 엔지니어링 플라스틱과의 블렌드 및 알로이 제품을 만드는데 획기적인 공헌을 하게 된다.