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Synthesis of a novel compound based on chitosan and ammonium polyphosphate for flame retardancy applications

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  1. Article

    Optical Properties of Polyimide Thin Films. Effect of Chemical Structure and Morphology

    The optical properties of polyimide (PI) thin films with various backbone structures were investigated with prism coupler. PI films were prepared from two types of dianhydrides: pyromellitic dianhydride (PMDA)...

    Choonkeun Lee, Jongchul Seo, Yonggun Shul, Haksoo Han in Polymer Journal (2003)

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  2. Article

    Effects of Diamines (1,4-Phenylene Diamine and 4,4′-Oxydianiline) on Water Sorption Behavior of Polyimide Thin Film

    Several polyimide thin films based on two widely commercialized diamines, 1,4-phenylene diamine (PDA) and 4,4′-oxydianiline (ODA), were prepared from respective poly(amic acid) precursors. Water sorption behav...

    Jongchul Seo, Anna Lee, Junseok Oh, Haksoo Han in Polymer Journal (2000)

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  3. Article

    Effect of Isomeric Oxydiphenylene Diamine on the Water Sorption Behavior of High Temperature Polyimide Thin Films

    The effects of isomeric oxydiphenylene diamines (ODA), 3,4′ODA and 4,4′ODA, on the water sorption behavior in pyromellitic dianhydride (PMDA)-ODA, biphenyltetracarboxylic dianhydride (BPDA)-ODA, 3,3′,4,4′-benz...

    Jongchul Seo, Haksoo Han, Anna Lee, Jungsoo Han in Polymer Journal (1999)

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  4. Article

    The Effect of Amic Ester Precursor on the Water Sorption Behavior and the Stress Relaxation of High Temperature Polyimide Thin Films

    Poly(4,4′-oxydiphenylene pyromellitimide) (PMDA-ODA) and poly(1,4-phenylene pyromellitimide) (PMDA-PDA) polyimides were prepared from poly(amic acid) (PAA) and poly(amic ester) (PAE) precursors, respectively. ...

    Jongchul Seo, Haksoo Han, Seung** Kim, Hyunsoo Chung, Yung-II Joe in Polymer Journal (1999)

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