• Elastomers and Composites
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• 제38권4호
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• pp.342-353
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• 2003

본 연구는 폴리에스터 가소제를 이용한 내제트유성 PVC계 실란트 개발에 관한 것이다. PVC 공중합체에 아디프산 글리콜 폴리에스터 가소제(Songcizer P-3000) 또는 DOP를 배합하여 연료유 함침 전후의 칩입도 변화, 용해도, 흐름성 및 인장 접착 신율을 측정하였다. 연료유 함침 전후 칩입도 변화 및 용해도를 측정한 결과 폴리에스터 가소제의 내제트유성이 DOP 가소제를 사용한 것 보다 작은 것으로 나타났다. PVC 공중합체에 Songcizer P-3000의 배합비를 중량비로 500 phr로 고정하고 접착성 향상제인 DCDP (dicyclopentadiene)계 석유수지를 400 phr까지 배합한 결과 첨가량에 비례하여 접착 신율이 감소하였다. 탄산칼슘은 연료유의 확산을 방지하였고 Songcizer P-3000을 사용한 경우 용해도를 감소시키는 결과를 얻었다.

• 한국추진공학회지
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• 제2권3호
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• pp.70-79
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• 1998

고에너지 및 무연 추진제의 바인더 중 프리폴리머로 PEG 및 PCP가 널리 사용되어왔다. 본 연구에서는 PEG 프리폴리머에 PCP0260 및 PCP1270을 혼합 사용한 경우와 PCP0260, PCP1270, PEG만을 각각 단독으로 사용한 경우에 또 가소제로는 BTTN/DEGDN, BTTN/TMETN계를 사용하여 PEG/ PCP의 함량 변화, Pl/Po의 함량 변화에 대한 점도 변화를 온도에 따라서 고찰하였고, 경화된 바인더로는 PEG/PCP의 함량 변화, Pl/Po의 함량 변화에 따라 기계적 특성, 유리전이 온도를 고찰하였다. 그 결과 PCP의 함량이 증가함에 따라 점도는 상승하나, 유리전이 온도가 낮아지므로 저온물성이 좋아지며, 기계적 특성이 우수한 장점을 지니고 있다. 또한 TMETN은 DEGDN에 비하여 유리전이 온도 및 점도의 상승을 보이는 단점을 나타내고 있다.

• Archives of Pharmacal Research
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• 제28권1호
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• pp.111-114
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• 2005

The antihistamine effects of the triprolidine were studied in rats to determine the feasibility of their enhanced transdermal delivery from the poly (4-methyl-1-pentene) (TPX) matrix system containing penetration enhancer and plasticizer. The antihistamine effects were determined by the Evans blue dye procedure by comparing the changes in vascular permeability increase following the transdermal administration. The vascular permeability increase was significantly reduced by transdermal administration of the triprolidine-TPX system containing triethyl citrate (TEC) and polyoxyethylene-2-oleyl ether (POE). Both the plasticizer and penetration enhancer played an important role in the skin permeation of triprolidine and increased the antihistamine effects. These results showed that the triprolidine-TPX matrix system containing plasticizer and penetration enhancer could be a transdermal delivery system providing the increased antihistamine effects.

• 한국세라믹학회지
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• 제29권3호
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• pp.241-251
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• 1992

The effects of slip composition and processing conditions on the fabrication of ceramic heat exchanger cores by doctor blade process were investigated. Since the effects of those two variables were inter-dependent, the effects of binder system, binder plus plasticizer, were extensively studied for a limited range of processing conditions and a pre-determined ceramic composition. The content of binder system and the ratio of binder to plasticizer were identified as main variables to affect densities and mechanical properties of green sheets, compressive properties and bond strengths of laminates, and shrinkages and their anisotropy of sintered laminates. However, sintered densities and water absorptions of laminates were not influenced by either the content of binder system or the ratio of binder to plasticizer, when the debinded laminates had a relatively high density (relative density of >55% in this study).

• Food Science and Biotechnology
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• 제14권1호
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• pp.108-111
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• 2005

To improve water-resistance and physical properties of sodium alginate film, effects of sodium alginate and plasticizer concentrations, divalent cation types and concentrations, and immersion time of films into divalent cation solutions on sodium alginate films were evaluated, based on elongation strength (ES), elongation rate (E), water vapor permeability (WVP), and water solubility (WS). Film made from 1.5% sodium alginate solution (w/w) had low WVP and WS, which are optimal characteristics for application of film preparation. Addition of plasticizer increased E and WS. Less than 2% $CaCl_2$ addition and 15min immersion time reduced WVP, WS, and E significantly (p<0.05). Sodium alginate films treated with $CuCl_2$, and $ZnCl_2$ solutions had lower WVP and WS, whereas $MgCl_2$ had no influence on improving water resistance of films.

• Elastomers and Composites
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• 제27권4호
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• pp.247-254
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• 1992

The purpose of this dissertation is to study the vulcanization characteristics, compression set and other physical properties of NBR vulcanizates according to the various plasticizer and its content. Vulcanization characteristics were investigated by using cure that has obtained by means of rheometer and Mooney viscometer. The result of physical properties, vulcanization characteristics are as fellows. 1. The results of test for optimum cure time in vulcanization characteristics of NBR compounds indicated the rapidity of scorch time according to the increase of amounts of plasticizer. 2. In the test of compression set property, LCR was the best effect. 3. In the test of oil resistance, LCR was the best effect.

• 한국세라믹학회지
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• 제37권8호
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• pp.824-831
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• 2000

Alumina tapes, having various ratios of alumina to alumina＋binder＋plasticizer (a/(a＋o)) and binder to binder＋plasticizer(b/(b＋p)), were prepared by the tape casting method. The tapes were thermocompressed varying the thermocompression parameters such as temperature, pressure, and duration time. Among the parameters, the pressure was the most influential to the tape packing density. The packing density varied in two different ways depending on the a/(a＋o) ratio. For the tapes having low a/(a＋o) ratio, a saturation density was reached by applying very a low pressure of 1 MPa. For tapes with high a/(a＋o), on the contrary, the saturation density was obtained at a relatively high pressure. These different responses to the pressure are attributed to the fact that the rearrangement of alumina particles by the pressure becomes easy as an organic content in the tapes is high.

• Korean Journal of Chemical Engineering
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• 제35권11호
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• pp.2296-2302
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• 2018

Internally plasticized PVC was prepared via chemical reaction of azide PVC and alkynyl group containing castor oil methyl ester. The chemical structure of alkynyl group containing castor oil methyl ester and internally plasticized PVC was characterized with FT-IR and $^1H$ NMR. Properties of internally plasticized PVC, including thermal stability, tensile tests and resistance to extraction in different solvents, was investigated. The results showed that alkynyl group containing castor oil methyl ester, as internal plasticizer of PVC, not only decreased the $T_g$ of PVC from $84.6^{\circ}C$ to $41.6^{\circ}C$ efficiently, but also presented no plasticizer loss in five different solvents. The tensile tests showed that elongation at break and tensile strength of internally plasticized PVC was 353.8% and 18.1 MPa. The internally plasticized PVC has potential application in replacing the traditional PVC material in PVC products with high durability.

• 접착 및 계면
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• 제2권4호
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• pp.1-9
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• 2001

실리콘 실란트는 실리콘폴리머, 가소제(plasticizer), 가교제(crosslinker), 충전제(filler), 촉매(catalyst), 첨가제(additive) 등으로 제조할 수 있으며, 실란트의 실용특성에는 각 제조변수의 종류와 혼합비율이 크게 영향한다. 알코올형 실리콘 실란트는 최근들어 환경적인 이점 때문에 그 사용이 늘고 있다. 본 연구에서는 상온경화형 일액형 알코올형 실리콘 실란트를 PDMS(polydimethylsiloxane)의 점도를 달리하여 제조한 후 그 접착특성을 평가하였다. 또한 점도 20000과 80000 cps의 PDMS를 혼합 사용하고 가교제, 가소제, 촉매 등의 함량을 변화시켜가면서 실란트를 제조하고 접착특성을 평가하였다. 또한 각 실란트의 제조과정 중의 반응온도 변화를 기록하여 적절한 제조조건을 얻도록 하였다. 실란트 제조시 혼합물의 온도가 $40^{\circ}C$ 이하가 되도록 제조변수의 조성을 조절하여 적합한 물성의 실란트를 제조할 수 있었다. 피착재에 따라 접착력이 달라졌으며, 유리/유리 > 유리/알루미늄 > 알루미늄/알루미늄 순으로 나타났다. 실란트의 신장률은 폴리머 점도와 가소제의 함량 증가에 따라 증가하였으며, 강도는 가교제와 가소제 함량 감소와 촉매함량 증가에 따라 증가하였다.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2000년도 추계심포지움 및 학술발표회:바이오모니터링 기법을 이용한 환경위해성 평가
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• pp.56-56
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• 2000