• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1989년도 춘계학술대회 논문집
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• pp.15-18
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• 1989

본보고는 전기절연재료로 사용되고 있는 폴리에칠렌의 전기적특성의 연신효과에 관한 연구 결과이다. 전기적 특성으로서는 전기전도, 이동도, 절연파괴의 온도의존성을 파악한 것이다.

• 보존과학연구
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• 통권6호
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• pp.197-223
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• 1985

• 대한화장품학회지
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• 제5권1호
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• pp.13-20
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• 1975

• 한국잔디학회:학술대회논문집
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• 한국잔디학회 2005년도 학술대회지
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• pp.28-29
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• 2005

• Journal of Pharmaceutical Investigation
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• 제24권4호
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• pp.257-263
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• 1994

The interpenetrating polymer networks (IPNs) of polyacrylic acid (PAA)-polyethylene glycol (PEG) were synthesized via crosslinking of PEG and simultaneous free radical polymerization of PAA. The equilibrium swelling of the IPNs matrices, ranged from 40% to 95%, was varied to a great extent as compared with PAA homopolymer due to the interpolymer interaction between PAA and PEG. The drug release kinetics of drug loaded matrices was significantly affected by the charge of drugs as well as interpolymer complexation.

• 한국안전학회지
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• 제6권2호
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• pp.15-20
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• 1991

In this paper, we have investigated the effect of organic additives and prestressed D C. voltage on the impulse tree initiation in low density polyethylene. The five klnds of organic compounds was selected for the purpose of inhibiting tree initiation and 10 wt % of each additive was mixed in low density polyethylene. The positive or negative impulse voltage was applied after prestressed D.C. voltage was applied in order to investigate the effect of the space charge influenced on tree initiation. The lengths of tree initiation in case of belng same polarity between prestressed D.C. voltage and impulse voltage were longer than those in case of being different polarity between prestressed D.C. voltage and impulse voltage. When the polarity prestressed D.C. voltage was the different plarity of impulse voltage, the length of tree initiation increased with increasing the prestressed D.C. voltage and decreasing the rest time Among the organic additives used in this paper, the m-cresol can be shown to be the most effective inhibiter to tree initiation.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 제2회 학술대회 논문집 일렉트렛트 및 응용기술전문연구회
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• pp.64-67
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• 2000

In this study, the DC dielectric breakdown of polyethylene used for clothing material of cable was experimented and then its data were simulated by Weibull distribution probability. The dielectric breakdown characteristics in polyethylene were examined and various effects of the DC dielectric breakdown on polyethylene were also discussed.

• 한국연초학회지
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• 제11권1호
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• pp.19-25
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• 1989

Effect of removal time of mulched polyethylene film on the chlorine content of toP soil and on the chlorine absorption by burley tobacco Plants was investigated under the field condition in 1986 and 1987. Treatment consisted of 4 removal times (from 30 to 75 days after transplanting with IS days interval) and control (no removal). The chlorine content of top Boll at 15 days after removal of mulched polyethylene film(MPF) lowered temporarily, and the decrement of chlorine content of top soil was closely related to the sum of rainfalls after removal of MPF. The chlorine was accumulated much in upper leaves when the MPF being removed early, while the chlorine was accumulated much in lower loaves when the MPF being removed late, relatively. However, the removal of MPF had no effect on the chlorine content of whole leaf. The yield decreased with removal of MPF during growing period.

• Journal of Pharmaceutical Investigation
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• 제25권4호
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• pp.313-322
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• 1995

The covalent conjugation of human recombinant superoxide dismutase (hrSOD) with trichloros-triazine activated polyethylene glycol (PEG) 5000 formed soluble conjugates with molecular weight of 92KD, which retained $90{\sim}98%$ of original activity with a markedly prolonged plasma half-life of enzyme activity. The effect of hrSOD-PEG conjugates on acetaminophen (ACP)-induced hepatotoxicity was tested in male rats which were pretreated with 3-methylcholanthrene. HrSOD-PEG conjugates inhibited the hepatotoxicity produced by ACP, on the other hand, native hrSOD had no protective effect. The above results indicated that oxygen radicals might participate in the mechanism of the ACP-induced hepatotoxicity and that polymer conjugated-protein drugs with prolonged half-lives could be employed as an effective therapeutic agent.

• Journal of Pharmaceutical Investigation
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• 제18권4호
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• pp.169-174
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• 1988

The release of heparin from monolithic devices composed of different ratios of polyethylene oxide-polypropylene oxide (PEO-PPO) and hydrophobic polyurethane was investigated. The release rate of heparin could be controlled by varying the PEO-PPO content. The heparin release rate from the devices increased as the content of PEO-PPO in the devices increased. The release mechanism may be associated with creation of micro-channels and pores through the devices following the change in the physical structure of the polymer network. Hydrophobic polyurethane containing PEO-PPO can provide an antithrombogenic material for prolonged release of heparin from a heparin blended system.