• Proceedings of the Korean Fiber Society Conference
• /
• 1992.06b
• /
• pp.63-64
• /
• 1992

• Proceedings of the Korean Fiber Society Conference
• /
• 1995.04a
• /
• pp.43-43
• /
• 1995

• The monthly packaging world
• /
• s.289
• /
• pp.79-83
• /
• 2017

• Proceedings of the Korean Fiber Society Conference
• /
• 1994.10a
• /
• pp.83-84
• /
• 1994

• Proceedings of the Korean Fiber Society Conference
• /
• 1996.04a
• /
• pp.240-242
• /
• 1996

• Polymer Science and Technology
• /
• v.3 no.2
• /
• pp.96-106
• /
• 1992

• Journal of the Korean Magnetic Resonance Society
• /
• v.5 no.1
• /
• pp.19-28
• /
• 2001

Miscibility and morphology in blends of bisphenol-A type polycarbonate and poly (ester-ether) elastomer with different compositions are studied by solid-state NMR spectroscopy. $^{13}$ C Solid-state NMR of CP/MAS/TOSS/DD, CP/MAS/DD, inversion recovery CP/MAS/DD, and 2D rotor driven spin diffusion techniques are used to identify the miscibility, morphology, and transesterification in blends. The blends of PC /BT elastomer with 15% to 42% of soft segment seem to be single phase miscible mixing and those of PC/PBT and PC/PBT elastomer with 62% of soft segment are cocontinuous two phase immiscible mixing. No significant transesterification reactions are observed in blends with different compositions.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2005.03a
• /
• pp.1183-1190
• /
• 2005

본 논문에서는 백령도 사곶해수욕장의 지반지지력 변화를 알아보고자, 평판재하시험(이하 PBT로 표시함)을 실시하였다. 시험에서 얻어진 데이터는 최대곡률법, logP-logs법, $P-{\triangle}s/{\triangle}(logt)$법을 종합적으로 분석 검토하여 결과값을 산출하였고, 시료를 채취하여 실내실험을 한 결과 통일분류법상 SP의 상태를 나타내었다. 재하시험과 실내실험의 데이터를 비교 분석한 결과, 물다짐의 상태에 따라 침하량의 차이가 2배 가까이 차이를 보였으며, 물다짐이 이루어진 곳의 침하량값이 작고, 허용지지력이 높은 것으로 산출 되었다.

• Proceedings of the KSME Conference
• /
• 2004.04a
• /
• pp.1576-1581
• /
• 2004

An experimental study has been carried out to investigate the frosting behaviors of thermally conductive plastic(PBT based resin) resin by comparing with those of aluminum and some plastic(PTFE based resin) test specimens. It is found that the frosting behavior of plastic specimens with 1 mm thickness show similar trend with aluminum except PTFE. The properties of frost formed on the specimens are affected by both thermal conductivityand surface characteristics (hydrophilic/hydrophobic) of the materials. It can be said that the heat and mass transfer rate of plastic materials are almost equivalent with those of aluminum.

• International Journal of Air-Conditioning and Refrigeration
• /
• v.13 no.3
• /
• pp.138-144
• /
• 2005

In order to select a new material for a heat exchanger, the frosting behavior of a thermally conductive plastic based on PBT was compared to the frosting behavior of aluminum and three types of plastics based on PTFE. The frosting behavior on the 1 mm thick PBT specimen was similar to that of the aluminum specimen but not that of the pure PTFE specimen. The properties of the frost formed on the specimens were affected by both the thermal conductivity and surface characteristics of the materials. The heat and mass transfer rates of the thermally conductive plastic were almost equivalent to those of the aluminum specimen.