• Applied Chemistry for Engineering
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• v.10 no.5
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• pp.707-710
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• 1999

Moisture content and intrinsic viscosity of antistatic polyethyleneterephthalate(PET) depending on the thermal stabilizer content was studied. The terminal moisture content of antistatic PET was a function of drying temperature rather than drying time. Intrinsic viscosity drop of antistatic PET after melt spinning increased with increasing moisture content of it. After melt spinning, intrinsic viscosity of antistatic PET was decreased due to the thermal degradation of polyoxyalkyleneglycol(POAG) component of antistatic agent. Triphenylphosphate(TPP) was more effective as a thermal stabilizer than trimethylphosphate(TMP). A little intrinsic viscosity drop after melt spinning was found in PET containing 300 ppm of TPP as a thermal stabilizer.

• The monthly packaging world
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• s.94
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• pp.127-133
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• 2001

• Polymer Science and Technology
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• v.3 no.2
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• pp.77-84
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• 1992

• The monthly packaging world
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• s.176
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• pp.126-129
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• 2007

식품의약안전청은 PET용기에 대한 안전관리를 위해 테레프탈산 및 이소프탈산에 대한 용출규격을 신설하여 기구 및 용기.포장의 안전관리를 도모하고자 기구 및 용기.포장의 기준.규격 중 개정안을 발표하고 폴리에틸렌테레프탈레이트(polyethyleneterephthalate:PET)중 테레프탈산 및 이소프탈산 용출규격, 시험방법을 신설했다. 본 고에서는 주요내용을 살펴보고 신구조문을 비교해 보도록 한다.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.10 no.3
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• pp.78-85
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• 1996

This paper experience the mechanism for the electret of polyethyleneterephthalate(PET) by using surface potentail measurement means. We investigated the internal charge production and becoming week by evaporating electrode in sample structure of electret coexist with hetero charge and homo charge, as the study based on two charge theory. We expects that the hetero charge consists of the dipole and ion displacement of internality, the homo charge consists of injected charge of externality.

• Proceedings of the Membrane Society of Korea Conference
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• 1994.03a
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• pp.113-129
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• 1994

수소는 여러 기체중에서 분자의 크기가 가장 작고, 막에 의한 분리가 쉬워 기체 막분리 공정 중에서 제일 먼저 개발 상업화 되었다. 기체분리막의 발전 역사를 살펴보면 1965년 Du Pont 사가 polyethyleneterephthalate(PET) 중공사 기체분리 장치를 만든 것이 최초이다. 그러나 이 장치는 시판되지 않았다. 1979년 Monsanto사가 다공성 polysulfone 중공사에 polyimethylsiloxane계 고분자를 박막형태로 도포한 복합막을 개발하여 이것을 이용한 공업적 규모의 수소분리장치(Prism separator) 를 개발하였는데 이 장치가 널리 퍼지게 되었다. 이 분리막은 현재 석유화학 및 석유정제공업 플랜트 폐가스로부터 수소회수, Oxo합성 기체중의 CO/H$_{2}$ 몰비 조절등의 분야에서 사용되고 있다. 본 논문에서는 수소 분리 회수용 고분자기체막을 중심으로 분자설계, 공정현화 및 최근 연구동향 등을 살펴보고자 한다.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.33 no.1
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• pp.21-27
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• 1984

Both of the isother mally and thermally stimulated surface potential decay characteristics(SPDC) have been investigated not only in corona charged polysulfone(PSF) which is one of heat resistant polymer, but also in corona charged polyethyleneterephthalate(PET) and polyfluoroethylene propylene(Teflon FEP) under the same experimental condition. PSF and PET shows similar SPDC in the high teperature region. Also the effect of polarity on SPDC observed from PSF and Teflon FEP shows almost the same phenomenon. From these results, we suggest that the mechanism on SPDC of PSF could be explained as the bulk conductivity from the characteristic analysis concerning PET and electron affivity from characteristic analysis concerning Teflon FEP.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.8 no.2
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• pp.39-43
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• 2002

Increasing use of plastics in food packaging materials has led to the issue of food-plastic packaging materials's mutual interactions. Although the plastic packaging materials are generally considered as inert, migration and sorption of fatty materials are some of the problems associated with their use. So, this work investigated the compatibility of three structurally different polymers, polypropylene (PP), polyethyleneterephthalate (PET) and ethylene vinyl alcohol copolymer (EVOH) with some structurally different food fats. The main goal was to study the sorption of food fats by the plastic films and to see what extent mechanical properties of the plastic films was affected by plasticization effect due to sorption of fatty materials. PP, PET, and EVOH films was immersed in pure triglycerides, and then extracted with hexane and analyzed for the amounts of fat migrated. The sorbed films were also investigated for change in mechanical properties. Result showed that structural factor of the films and fatty materials plays important role in th migration process. The fat with the simplest structure are migrated more easily that the fat with more complex structure. However, structural effect of migration was varied according to degree of crystallinity and density of plastic films. In addition to that, polarity of plastic film was affected migration of fatty materials significantly. Additional research is needed to justify the reason why migration of fatty materials into the films was affected by polarity and structural integrity.

• Bulletin of the Korean Chemical Society
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• v.27 no.10
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• pp.1633-1637
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• 2006

We demonstrate a selective vapor-phase deposition of conductive poly(3,4-ethylenedioxythiophene) (PEDOT) thin films on patterned $FeCl_3$. The PEDOT thin films were grown on various substrates by using the vapor-phase polymerization of ethylenedioxythiophene (EDOT) with $FeCl_3$ catalytic layers at 325 K. The selective deposition of the PEDOT thin films using vapor-phase polymerization was accomplished with patterned $FeCl_3$ layers as templates. Microcontact printing was done to prepare patterned $FeCl_3$ on polyethyleneterephthalate (PET) substrates. The selective vapor-phase deposition is based on the fact that the PEDOT thin films are selectively deposited only on the regions exposing $FeCl_3$ of the PET substrates, because the EDOT monomer can be polymerized only in the presence of oxidants, such as $FeCl_3$, Fe($CIO_4$), and iron(II) salts of organic acids/inorganic acids containing organic radicals.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.988-991
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• 2004

In the present investigation, we tried AR coating simulation by using the "Essential Macleod optical coating design and analysis" program. After various run of the program we selected appropriate materials which have specific refractive indices and for that thickness was optimized to get the low reflectance. By comparing the simulated results for the different materials,we found that $SiO_2$ and TiN are the appropriate materials for this Flat panel device (FPD) application. Thin films of these materials were deposited using RF magnetron sputtering and Inductively Coupled Plasma Chemical Vapour Deposition (ICPCVD) methods on Polyethyleneterephthalate (PET) substrates. Spectroscopic ellipsometer (SE MF-1000) and UV-Vis spectrophotometer (SCINCO) were used for the optical characterization. The obtained experimental results are in good agreement with the simulation results.