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Your search keyword '"Choi, Eui Jun"' showing total 23 results
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23 results on '"Choi, Eui Jun"'

21. Effect of P(<TOGGLE>l</TOGGLE>LA-<TOGGLE>co</TOGGLE>-ɛCL) on the compatibility and crystallization behavior of PCL/PLLA blends

Author

Kim, Chang-Hyeon, Cho, Kuk Young, Choi, Eui-Jun, and Park, Jung-Ki

Abstract

This article describes the compatibility of two semicrystalline polymers, poly(ɛ-caprolactone) (PCL) and poly(l-lactic acid) (PLLA). The compatibility of the PCL/PLLA blends was enhanced by the compatibilizing effect of the poly(l,l-lactide-co-ɛ-caprolactone) [P(lLA-co-ɛCL)]. A discussion details the effect of the concentration of the compatibilizing agent, the copolymer of l,l-lactide and ɛ-caprolactone of a 50/50 mol ratio [P(lLA-co-ɛCL)], on the compatibility and the crystallization behavior of the blends of PCL and PLLA. It was found that the addition of P(lLA-co-ɛCL) could suppress the crystallization of PLLA at its Tc and induced the concurrent crystallization of PLLA and PCL. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 226–231, 2000

Published
2000
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22. Structure–property relationship in PCL/starch blend compatibilized with starch-<TOGGLE>g</TOGGLE>-PCL copolymer

Author

Choi, Eui-Jun, Kim, Chang-Hyeon, and Park, Jung-Ki

Abstract

The polycaprolactone (PCL)/starch blends were prepared by using the starch-g-PCL (SGCL) graft copolymers as compatibilizers, and their mechanical properties were correlated with the compatibilizing effect of the SGCL copolymers having various molecular structures. The modulus and strength of the PCL/starch blend were decreased, whereas the percent elongation and the toughness were increased remarkably with the addition of SGCL having appropriate graft structure. These property changes were analyzed in terms of the PCL crystallinity and the interfacial adhesion between the PCL matrix and starch dispersion phases, which were dominated by the compatibilizing effects of the SGCL copolymers. © 1999 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 37: 2430–2438, 1999

Published
1999
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23. Filtering Bleb Size in the Early Postoperative Period Affects the Long-term Surgical Outcome after Trabeculectomy.

Author

Jang YK, Choi EJ, Son DO, Ahn BH, and Han JC

Subjects
Humans, Conjunctiva surgery, Intraocular Pressure, Retrospective Studies, Treatment Outcome, Glaucoma surgery, Trabeculectomy methods
Abstract

Purpose: To investigate whether postoperative filtering bleb size affects the surgical outcome after trabeculectomy., Methods: In this study, we retrospectively reviewed 145 medically uncontrolled glaucoma patients with intraocular pressure (IOP) values >21 mmHg before surgery and data from ≥2 years of follow-up. Postoperative IOP, filtering bleb size including extent and height, and other clinical factors were measured after trabeculectomy. We divided bleb extent into quadrants and bleb height by 0.5 intervals of corneal thickness. The main outcome measure was surgical success. We confirmed complete success when the IOP was ≤21 mmHg and decreased by >20% from baseline without medication or additional procedures. Qualified success used the same criteria but allowed for medication or additional procedures. Cases with reoperation or two consecutive IOP measurements <6 mmHg were considered failures., Results: A total of 145 eyes of 145 patients was included. The average observation period was 30.8 ± 10.9 months. During multivariate Cox regression analysis, a larger extent of filtering bleb revealed significantly low hazard ratios in both complete and surgical success (0.509 and 0.494, respectively); however, there was no significant relationship between bleb height and surgical outcome., Conclusions: The extent of the filtering bleb was associated with surgical outcomes of trabeculectomy in glaucoma patients.

Published
2023
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