Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Hwan Kwang Lee"'
Publikováno v:
Macromolecular Research. 16:631-636
The intrinsic viscosities were determined for poly(DL-lactic acid) (PDLLA) solutions in 1,2-dialkyl phthalate at temperatures ranging from 30 to 60 °C. A series of dialkyl phthalate, in which the alkyl group was changed from methyl to propyl, was us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c73d817d3e624464b02e15cae539c75
https://doi.org/10.1007/bf03218572
https://doi.org/10.1007/bf03218572
Autor:
Hwan-Kwang Lee
Publikováno v:
Journal of the Korea Academia-Industrial cooperation Society. 9:182-188
The compounds of recycled polyethylene(PE) and fly-ashes were prepared. Polymers used were sorted PE from mixed plastics of household waste and Low Density Polyethylene(LDPE) and Linear Low Density Polyethylene(LLDPE) recycled from the scrap of packa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::977b5a0a500d34b5305a58010f821a33
https://doi.org/10.5762/kais.2008.9.1.182
https://doi.org/10.5762/kais.2008.9.1.182
Publikováno v:
Polymer. 45:4491-4498
Some of thermodynamic parameters for poly(lactic acid) (PLA)/dialkyl phthalate systems have been investigated. Both poly( dl -lactic acid) (PDLLA) and poly( l -lactic acid) (PLLA), which are stereoisomers of PLA, were used and a series of 1,2-dialkyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a295a469febd8af6a0bbdad5115801b
https://doi.org/10.1016/j.polymer.2004.04.036
https://doi.org/10.1016/j.polymer.2004.04.036
Publikováno v:
Journal of Applied Polymer Science. 88:2224-2232
Thermally induced phase separation in poly(lactic acid)/dialkyl phthalate systems was investigated. Poly(DL-lactic acid) (PDLLA) and poly(L-lactic acid) (PLLA) with different molecular weights were used. A series of dialkyl phthalates, with different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d6f6e50831b81d36af63710af80e7dc
https://doi.org/10.1002/app.11939
https://doi.org/10.1002/app.11939
Publikováno v:
Journal of Membrane Science. 190:69-77
Mass transfer process involved in the immersion precipitation of polyurethane/dimethylformamide (DMF)/water system was investigated. The set of diffusion equations describing the local composition of the membrane solution as a function of space coord
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5e748daabaf3a3e31afd77e3701a682
https://doi.org/10.1016/s0376-7388(01)00420-3
https://doi.org/10.1016/s0376-7388(01)00420-3
Publikováno v:
Polymer. 42:3893-3900
A series of segmented polyurethanes (SPUs) using poly(tetramethylene oxide) (PTMO), 4,4′-methylenebis (phenyl isocyanate) (MDI), and ethylene glycol (EG) with different molar ratios of MDI and PTMO were prepared to study the effects of the hard seg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ce5e810b9383741b4da3351798e0b30
https://doi.org/10.1016/s0032-3861(00)00707-2
https://doi.org/10.1016/s0032-3861(00)00707-2
Publikováno v:
Korean Journal of Chemical Engineering. 17:564-569
The cloud point curves for a ternary system of PSf/NMP/water were determined by a titration method at 15 ‡C, 30 ‡C, 45 ‡C and 60 ‡C. A small amount of water (3–10 wt% water) was needed to achieve liquid-liquid phase separation and the tempe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4462c5ca7a6d96bf2879b4dce7b740cb
https://doi.org/10.1007/bf02707167
https://doi.org/10.1007/bf02707167
Publikováno v:
Journal of Applied Polymer Science. 74:2124-2132
Polyurethane membranes were prepared by an immersion precipitation process. The effects of dope concentration, coagulation bath composition, and the chemical structure of the polyurethane on the morphology of the membranes were studied. The degree of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26a3dcf9886b8fcb807bd10c41ad1d56
https://doi.org/10.1002/(sici)1097-4628(19991128)74:9<2124::aid-app2>3.0.co
https://doi.org/10.1002/(sici)1097-4628(19991128)74:9<2124::aid-app2>3.0.co
Publikováno v:
Journal of Applied Polymer Science. 74:2113-2123
To construct a phase diagram of the polysulfone (PSF)/polyethersulfone (PES)/N-methyl-2-pyrrolidone (NMP)/water quaternary system, cloud point measurements were carried out by a titration method. The miscible region in the PSF/PES/NMP/water quaternar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d722e32bd676b5b5596b812d3b31ffac
https://doi.org/10.1002/(sici)1097-4628(19991128)74:9<2113::aid-app1>3.0.co
https://doi.org/10.1002/(sici)1097-4628(19991128)74:9<2113::aid-app1>3.0.co
Surface structure and phase separation mechanism of polysulfone membranes by atomic force microscopy
Publikováno v:
Journal of Membrane Science. 163:159-166
Atomic force microscopy (AFM) was used to investigate the surface of polysulfone (PSf) membranes. The AFM method provides information on both size and shape of pores or cavities on the surface as well as the roughness of the skin. The pore sizes obta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdd4ffd3aac4b675bcaaaa0e8542fbd5
https://doi.org/10.1016/s0376-7388(99)00164-7
https://doi.org/10.1016/s0376-7388(99)00164-7