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  1. No Access

    Article

    Preparation of regenerated cellulose fiber via carbonation. I. Carbonation and dissolution in an aqueous NaOH solution

    Cellulose carbonate was prepared by the reaction of cellulose pulp and CO2 with treatment reagents, such as aqueous ZnCl2 (20–40 wt%) solution, acetone or ethyl acetate, at −5–0°C and 30–40 bar (CO2) for 2 hr. Am...

    Sang Youn Oh, Dong Il Yoo, Younsook Shin, Wha Seop Lee, Seong Mu Jo in Fibers and Polymers (2002)

  2. Article

    Effect of Thermal History on the Phase Behavior of N-Methyl Morpholine N-Oxide Hydrates and Their Solutions of Cellulose

    N-Methyl morpholine N-oxide (NMMO) hydrates, used in the preparation of cellulose spinning dope for lyocell manufacturing, have various crystal structures according to the hydration number (n). A single melting p...

    Dong Bok Kim, Wha Seop Lee, Seong Mu Jo, Young Moo Lee, Byoung Chul Kim in Polymer Journal (2001)

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  3. Article

    Phase Transition of Cellulose Solutions in N-Methyl Morpholine N-Oxide Hydrates

    Melting dissolution conditions of cellulose in N-methyl morpholine N-oxide(NMMO) hydrate had a profound effect on the phase behavior of cellulose/NMMO/H2O systems. Introducing an antioxidant, n-propyl gallate (PG...

    Dong Bok Kim, Wha Seop Lee, Seong Mu Jo, Young Moo Lee, Byoung Chul Kim in Polymer Journal (2001)

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  4. No Access

    Article

    New AB or ABA type block copolymers: atom transfer radical polymerization (ATRP) of methyl methacrylate using iodine-terminated PVDFs as (macro)initiators

    Seong-Mu Jo, Wha-Seop Lee, Byoung-Sung Ahn, Kun-You Park, Kyung-A Kim… in Polymer Bulletin (2000)

  5. No Access

    Article

    The efficient synthesis of poly(silapropynylenes) via condensation of NaCэCNa with R1R2SiCL2 activated by pyridine

    To efficiently prepare poly(silapropynylenes), the condensation of NaCэCNa with R1R2SiCl2 activated by pyridine were investigated. The condensation produced tactable polymers(Mw ca. 2100–9000) with significantly ...

    Seong-Mu Jo, Wha-Seop Lee, Hak-Su Lyu in Polymer Bulletin (1993)

  6. No Access

    Article

    Effect of heat treatment on structural changes and dynamic mechanical relaxation of polyacrylonitrile fibers

    The structural changes of polyacrylonitrile fibers have been studied through the effect of heat treatment on dynamic mechanical relaxation of undrawn and drawn fibers. It is generally accepted that polyacrylon...

    Seo Hyun Cho, Jong Su Park, Wha Seop Lee, In Jae Chung in Polymer Bulletin (1993)