Macromolecular Research

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Gas separation properties of 6FDA-based polyimide membranes with a polar group
Macromolecular Research - Tập 11 - Trang 157-162 - 2003
Sang-Hee Park, Kwang-Je Kim, Won-Wook So, Sang-Jin Moon, Soo-Bok Lee
6FDA-based polyimides were prepared from the thermal imidization reaction of 6FDA with diamines of BAPAF, DAP, and DABA having a polar group of hydroxyl or carboxyl. Properties of the dense polyimide membranes were characterized and their gas permeation properties for H2, CO2, O2, N2, and CH4 were investigated. Permeabilities, diffusion coefficients and diffusivity selectivities of polar group-con...... hiện toàn bộ
Single-step preparation of polythiophene bearing branched chains by dual initiation polymerization
Macromolecular Research - Tập 25 - Trang 243-248 - 2017
Jae Keun Hong, Yong Seok Kim, Wonseok Cho, Jung Hyun Kim
A facile approach for the single-step preparation of branched polythiophenes using a copper(II) catalyst via a dual initiation polymerization process is reported. The synthetic route of dual initiation polymerization involves both oxidative polymerization and metal-catalyzed radical polymerization. In this process, two kinds of polymerization can be performed concurrently as a one-pot reaction usi...... hiện toàn bộ
Molecularly doped polymeric network nanolayers for organic light-emitting devices
Macromolecular Research - Tập 14 - Trang 401-403 - 2006
Jihwan Keum, Chang-Sik Ha, Youngkyoo Kim
For a couple of decades a keen interest has been paid to organic light-emitting devices (OLED) that utilize organic semiconductors (small molecules or polymers) as an electrooptical medium.1–3 Recently the device efficiency issue, which was one of the crucial points for low power consumption displays in portable electronic applications, has been almost sorted out by making use of triplet emissions...... hiện toàn bộ
Thermoresponsive phase transitions of PLA-block-PEO-block-PLA triblock stereo-copolymers in aqueous solution
Macromolecular Research - Tập 10 - Trang 359-364 - 2002
Hyung Tak Lee, Doo Sung Lee
A series of PLA-PEO-PLA triblock stereo-copolymers with varying PLA/PEO and L-/DL-LA ratios were synthesized via ring opening polymerizations. Aqueous solutions of these copolymers undergo thermo-responsive phase transitions as the temperature monotonically increases. Further study shows that there is a critical gel concentration (CGC), and also lower and upper critical gel temperatures (CGTs), at...... hiện toàn bộ
Synthesis, end-functionalization and characterization of hyperbranched polysiloxysilanes from AB3 type monomer
Macromolecular Research - Tập 15 - Trang 147-153 - 2013
Yoshihito Ishida, Kazutoshi Yokomachi, Makoto Seino, Teruaki Hayakawa, Masa-aki Kakimoto
Hyperbranched polysiloxysilanes (HBPSs), with a variety of terminal functional groups (vinyl, epoxy, carboxyl and hydroxyl), were synthesized by the self-polymerization of an AB3 type monomer of tris(dimethylvinylsiloxy) silane, with subsequent end-functionalizations, such as epoxidation and radical addition reaction, respectively. The ratio of the α- and β-addition linkages in the HBPS polymerize...... hiện toàn bộ
Highly stretchable dielectric elastomer material based on acrylonitrile butadiene rubber
Macromolecular Research - Tập 22 - Trang 1170-1177 - 2014
Tien Dat Nguyen, Canh Toan Nguyen, Dong-hyuk Lee, Uikyum Kim, Choonghan Lee, Jae-do Nam, Hyouk Ryeol Choi
This study presents a highly stretchable dielectric elastomer material for transducers based on acrylonitrile butadiene rubber (NBR). The material has advantages in that its mechanical and electrical properties can be modified according to the requirements of applications by changing the content of additives such as carbon black (CB), multi-walled carbon nanotubes (MWCNT), and graphite (GP) in the...... hiện toàn bộ
Dual-Responsive Shape Memory and Thermally Reconfigurable Reduced Graphene Oxide-Vitrimer Composites
Macromolecular Research - - 2019
Guokang Chen, Kun Wu, Qian Zhang, Yan-cen Shi, Mangeng Lu
Controlled release of proteins from pluronic-based nano-carrier
Macromolecular Research - Tập 19 - Trang 639-642 - 2011
Won Il Choi, Young Ha Kim, Giyoong Tae
Development of a new micellar anticancer drug: Cationic polymer/vitamin A conjugate covered with hyaluronic acid
Macromolecular Research - Tập 18 - Trang 913-918 - 2010
Hyeona Yim, Eun Ae Jo, Kun Na
This study examined the development of a new micellar drug (MD) prepared from polyethylenimine (PEI)/vitamin A (all trans-retinoic acid; ATRA) conjugate (PeRA) for the treatment of cancer. To endow specific toxicity to cancer cells, PeRA was coated with hyaluronic acid (anionic polymer; HA), which enhanced the biocompatibility of PeRA and was easily degraded by the enzyme secreted from the tumor s...... hiện toàn bộ
Characterization of poly(ethylene oxide)-b-poly(L-lactide) block copolymer by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
Macromolecular Research - Tập 11 - Trang 341-346 - 2003
Jeongmin Hong, Donghyun Cho, Taihyun Chang, Woo Sun Shim, Doo Sung Lee
A poly(ethylene oxide)-b-poly(L-lactide) diblock copolymer (PEO-b-PLLA) is characterized by matrixassisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and a block length distribution map is constructed. Although the MALDI-TOF mass spectrum of PEO-b-PLLA is very complicated, most of the polymer species were identified by isolating the overlapped isotope patterns and ...... hiện toàn bộ
Tổng số: 2,158   
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