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폴리이미드의 제조와 성질에 관한 연구 : Ⅳ . 6FDA 계 폴리이미드
이동호,김승환,유태욱,구승영 ( Dong Ho Lee,Seung Hwan Kim,Tae Wook Yoo,Seung Young Koo ) 한국공업화학회 1994 공업화학 Vol.5 No.5
2,2-Bis-(3,4-dicarboxyphenyl)hexafluoropropane dianhydride(6FDA), 2,2-bis-[4-(4-aminophenoxy)phenyl]hexafluoropropane 및 4,4-diaminodiphenyl ether 등을 이용하여 단독폴리아믹산, 공폴리아믹산 및 폴리아믹산의 블렌드를 만들고, 열이미드화로 각각의 폴리이미드를 제조하여 구조와 성질을 조사하였다. 그 결과로 열이미드화 동안에 폴리아믹산 간의 교환반응이 일어난다는 것을 알았다. 그리고 공중합이나 폴리아믹산의 블렌드 방법으로 폴리이미드의 분자복합체를 얻을 수 있었다. Using 2,2-Bis-(3,4-dicarboxyphenyl)hexafluoropropane dianhydride, 2,2-bis-[4-(4-aminophenoxy)phenyl]hexafluoropropane and 4,4-diaminodiphenyl ether, the homopolyamic acids, copolyamic acids and blend of homopolyamic acids were prepared and converted to polyimide(PI)s by thermal imidization. In results, it has been found that a exchange reaction of polyamic acids can be occurred during thermal imidization. With measurement of mechanical properties, it was suggested that PI/PI molecular composite can be obtained by copolymerization or physical blending of homopolyamic acids.
李東鎬,具承榮 慶北大學校 1985 論文集 Vol.39 No.-
The reduction reaction of poly(p-bromostyrene) with the reducing system, bis(cyclopen tadienyl) titanium dichloride (Cp_2TiCl_2) and isopropyl magnesium bromide (i-PrMgBr) has been studied. This reducing system was very efficient in the reduction of polymer containing bromines as well as vinyl and aryl bromides. The structure of polymer assumed to be changed during the reaction with the observation that the viscosity of reacted polymer increased with conversion. The reduction rate of poly(p-bromostyrene) was found to be second order against both the concentration of Cp_2TiCl_2 and i-PrMgBr. The conversion was found to be decreased with increasing the concentration and the molecular weight of poly(p-bromostyrene). The activation energy obtained from the Arrhenius plot has been found to be 12K㎈/mole.